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mariadb/sql/log_event.cc
unknown 22639a066c Bug #50914 mysqlbinlog not handling drop of current default database 
mysqlbinlog only prints "use $database" statements to its output stream
when the active default database changes between events. This will cause
"No Database Selected" error when dropping and recreating that database.

To fix the problem, we clear print_event_info->db when printing an event
of CREATE/DROP/ALTER database statements, so that the Query_log_event
after such statements will be printed with the use 'db' anyway except
transaction keywords.

mysql-test/r/mysqlbinlog.result:
  Test result for Bug#50914.
mysql-test/t/mysqlbinlog.test:
  Added test to verify if the approach of the mysqlbinlog prints
  "use $database" statements to its output stream will cause
  "No Database Selected" error when dropping and recreating
  that database.
sql/log_event.cc:
  Updated code to clear print_event_info->db when printing an event
  of CREATE/DROP/ALTER database statements, so that the Query_log_event
  after such statements will be printed with the use 'db' anyway except
  transaction keywords.
2010-12-29 11:52:57 +08:00

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/* Copyright 2000-2008 MySQL AB, 2008 Sun Microsystems, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#ifdef MYSQL_CLIENT
#include "mysql_priv.h"
#else
#ifdef USE_PRAGMA_IMPLEMENTATION
#pragma implementation // gcc: Class implementation
#endif
#include "mysql_priv.h"
#include "slave.h"
#include "rpl_rli.h"
#include "rpl_mi.h"
#include "rpl_filter.h"
#include "rpl_utility.h"
#include "rpl_record.h"
#include <my_dir.h>
#endif /* MYSQL_CLIENT */
#include <base64.h>
#include <my_bitmap.h>
#define log_cs &my_charset_latin1
#define FLAGSTR(V,F) ((V)&(F)?#F" ":"")
/*
Size of buffer for printing a double in format %.<PREC>g
optional '-' + optional zero + '.' + PREC digits + 'e' + sign +
exponent digits + '\0'
*/
#define FMT_G_BUFSIZE(PREC) (3 + (PREC) + 5 + 1)
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
static int rows_event_stmt_cleanup(Relay_log_info const *rli, THD* thd);
static const char *HA_ERR(int i)
{
switch (i) {
case HA_ERR_KEY_NOT_FOUND: return "HA_ERR_KEY_NOT_FOUND";
case HA_ERR_FOUND_DUPP_KEY: return "HA_ERR_FOUND_DUPP_KEY";
case HA_ERR_RECORD_CHANGED: return "HA_ERR_RECORD_CHANGED";
case HA_ERR_WRONG_INDEX: return "HA_ERR_WRONG_INDEX";
case HA_ERR_CRASHED: return "HA_ERR_CRASHED";
case HA_ERR_WRONG_IN_RECORD: return "HA_ERR_WRONG_IN_RECORD";
case HA_ERR_OUT_OF_MEM: return "HA_ERR_OUT_OF_MEM";
case HA_ERR_NOT_A_TABLE: return "HA_ERR_NOT_A_TABLE";
case HA_ERR_WRONG_COMMAND: return "HA_ERR_WRONG_COMMAND";
case HA_ERR_OLD_FILE: return "HA_ERR_OLD_FILE";
case HA_ERR_NO_ACTIVE_RECORD: return "HA_ERR_NO_ACTIVE_RECORD";
case HA_ERR_RECORD_DELETED: return "HA_ERR_RECORD_DELETED";
case HA_ERR_RECORD_FILE_FULL: return "HA_ERR_RECORD_FILE_FULL";
case HA_ERR_INDEX_FILE_FULL: return "HA_ERR_INDEX_FILE_FULL";
case HA_ERR_END_OF_FILE: return "HA_ERR_END_OF_FILE";
case HA_ERR_UNSUPPORTED: return "HA_ERR_UNSUPPORTED";
case HA_ERR_TO_BIG_ROW: return "HA_ERR_TO_BIG_ROW";
case HA_WRONG_CREATE_OPTION: return "HA_WRONG_CREATE_OPTION";
case HA_ERR_FOUND_DUPP_UNIQUE: return "HA_ERR_FOUND_DUPP_UNIQUE";
case HA_ERR_UNKNOWN_CHARSET: return "HA_ERR_UNKNOWN_CHARSET";
case HA_ERR_WRONG_MRG_TABLE_DEF: return "HA_ERR_WRONG_MRG_TABLE_DEF";
case HA_ERR_CRASHED_ON_REPAIR: return "HA_ERR_CRASHED_ON_REPAIR";
case HA_ERR_CRASHED_ON_USAGE: return "HA_ERR_CRASHED_ON_USAGE";
case HA_ERR_LOCK_WAIT_TIMEOUT: return "HA_ERR_LOCK_WAIT_TIMEOUT";
case HA_ERR_LOCK_TABLE_FULL: return "HA_ERR_LOCK_TABLE_FULL";
case HA_ERR_READ_ONLY_TRANSACTION: return "HA_ERR_READ_ONLY_TRANSACTION";
case HA_ERR_LOCK_DEADLOCK: return "HA_ERR_LOCK_DEADLOCK";
case HA_ERR_CANNOT_ADD_FOREIGN: return "HA_ERR_CANNOT_ADD_FOREIGN";
case HA_ERR_NO_REFERENCED_ROW: return "HA_ERR_NO_REFERENCED_ROW";
case HA_ERR_ROW_IS_REFERENCED: return "HA_ERR_ROW_IS_REFERENCED";
case HA_ERR_NO_SAVEPOINT: return "HA_ERR_NO_SAVEPOINT";
case HA_ERR_NON_UNIQUE_BLOCK_SIZE: return "HA_ERR_NON_UNIQUE_BLOCK_SIZE";
case HA_ERR_NO_SUCH_TABLE: return "HA_ERR_NO_SUCH_TABLE";
case HA_ERR_TABLE_EXIST: return "HA_ERR_TABLE_EXIST";
case HA_ERR_NO_CONNECTION: return "HA_ERR_NO_CONNECTION";
case HA_ERR_NULL_IN_SPATIAL: return "HA_ERR_NULL_IN_SPATIAL";
case HA_ERR_TABLE_DEF_CHANGED: return "HA_ERR_TABLE_DEF_CHANGED";
case HA_ERR_NO_PARTITION_FOUND: return "HA_ERR_NO_PARTITION_FOUND";
case HA_ERR_RBR_LOGGING_FAILED: return "HA_ERR_RBR_LOGGING_FAILED";
case HA_ERR_DROP_INDEX_FK: return "HA_ERR_DROP_INDEX_FK";
case HA_ERR_FOREIGN_DUPLICATE_KEY: return "HA_ERR_FOREIGN_DUPLICATE_KEY";
case HA_ERR_TABLE_NEEDS_UPGRADE: return "HA_ERR_TABLE_NEEDS_UPGRADE";
case HA_ERR_TABLE_READONLY: return "HA_ERR_TABLE_READONLY";
case HA_ERR_AUTOINC_READ_FAILED: return "HA_ERR_AUTOINC_READ_FAILED";
case HA_ERR_AUTOINC_ERANGE: return "HA_ERR_AUTOINC_ERANGE";
case HA_ERR_GENERIC: return "HA_ERR_GENERIC";
case HA_ERR_RECORD_IS_THE_SAME: return "HA_ERR_RECORD_IS_THE_SAME";
case HA_ERR_LOGGING_IMPOSSIBLE: return "HA_ERR_LOGGING_IMPOSSIBLE";
case HA_ERR_CORRUPT_EVENT: return "HA_ERR_CORRUPT_EVENT";
case HA_ERR_ROWS_EVENT_APPLY : return "HA_ERR_ROWS_EVENT_APPLY";
}
return 0;
}
/**
Error reporting facility for Rows_log_event::do_apply_event
@param level error, warning or info
@param ha_error HA_ERR_ code
@param rli pointer to the active Relay_log_info instance
@param thd pointer to the slave thread's thd
@param table pointer to the event's table object
@param type the type of the event
@param log_name the master binlog file name
@param pos the master binlog file pos (the next after the event)
*/
static void inline slave_rows_error_report(enum loglevel level, int ha_error,
Relay_log_info const *rli, THD *thd,
TABLE *table, const char * type,
const char *log_name, ulong pos)
{
const char *handler_error= HA_ERR(ha_error);
char buff[MAX_SLAVE_ERRMSG], *slider;
const char *buff_end= buff + sizeof(buff);
uint len;
List_iterator_fast<MYSQL_ERROR> it(thd->warn_list);
MYSQL_ERROR *err;
buff[0]= 0;
for (err= it++, slider= buff; err && slider < buff_end - 1;
slider += len, err= it++)
{
len= my_snprintf(slider, buff_end - slider,
" %s, Error_code: %d;", err->msg, err->code);
}
if (ha_error != 0)
rli->report(level, thd->is_error() ? thd->main_da.sql_errno() : 0,
"Could not execute %s event on table %s.%s;"
"%s handler error %s; "
"the event's master log %s, end_log_pos %lu",
type, table->s->db.str, table->s->table_name.str,
buff, handler_error == NULL ? "<unknown>" : handler_error,
log_name, pos);
else
rli->report(level, thd->is_error() ? thd->main_da.sql_errno() : 0,
"Could not execute %s event on table %s.%s;"
"%s the event's master log %s, end_log_pos %lu",
type, table->s->db.str, table->s->table_name.str,
buff, log_name, pos);
}
#endif
/*
Cache that will automatically be written to a dedicated file on
destruction.
DESCRIPTION
*/
class Write_on_release_cache
{
public:
enum flag
{
FLUSH_F
};
typedef unsigned short flag_set;
/*
Constructor.
SYNOPSIS
Write_on_release_cache
cache Pointer to cache to use
file File to write cache to upon destruction
flags Flags for the cache
DESCRIPTION
Class used to guarantee copy of cache to file before exiting the
current block. On successful copy of the cache, the cache will
be reinited as a WRITE_CACHE.
Currently, a pointer to the cache is provided in the
constructor, but it would be possible to create a subclass
holding the IO_CACHE itself.
*/
Write_on_release_cache(IO_CACHE *cache, FILE *file, flag_set flags = 0)
: m_cache(cache), m_file(file), m_flags(flags)
{
reinit_io_cache(m_cache, WRITE_CACHE, 0L, FALSE, TRUE);
}
~Write_on_release_cache()
{
copy_event_cache_to_file_and_reinit(m_cache, m_file);
if (m_flags | FLUSH_F)
fflush(m_file);
}
/*
Return a pointer to the internal IO_CACHE.
SYNOPSIS
operator&()
DESCRIPTION
Function to return a pointer to the internal cache, so that the
object can be treated as a IO_CACHE and used with the my_b_*
IO_CACHE functions
RETURN VALUE
A pointer to the internal IO_CACHE.
*/
IO_CACHE *operator&()
{
return m_cache;
}
private:
// Hidden, to prevent usage.
Write_on_release_cache(Write_on_release_cache const&);
IO_CACHE *m_cache;
FILE *m_file;
flag_set m_flags;
};
#ifndef DBUG_OFF
uint debug_not_change_ts_if_art_event= 1; // bug#29309 simulation
#endif
/*
pretty_print_str()
*/
#ifdef MYSQL_CLIENT
static void pretty_print_str(IO_CACHE* cache, const char* str, int len)
{
const char* end = str + len;
my_b_printf(cache, "\'");
while (str < end)
{
char c;
switch ((c=*str++)) {
case '\n': my_b_printf(cache, "\\n"); break;
case '\r': my_b_printf(cache, "\\r"); break;
case '\\': my_b_printf(cache, "\\\\"); break;
case '\b': my_b_printf(cache, "\\b"); break;
case '\t': my_b_printf(cache, "\\t"); break;
case '\'': my_b_printf(cache, "\\'"); break;
case 0 : my_b_printf(cache, "\\0"); break;
default:
my_b_printf(cache, "%c", c);
break;
}
}
my_b_printf(cache, "\'");
}
#endif /* MYSQL_CLIENT */
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
static void clear_all_errors(THD *thd, Relay_log_info *rli)
{
thd->is_slave_error = 0;
thd->clear_error();
rli->clear_error();
}
inline int idempotent_error_code(int err_code)
{
int ret= 0;
switch (err_code)
{
case 0:
ret= 1;
break;
/*
The following list of "idempotent" errors
means that an error from the list might happen
because of idempotent (more than once)
applying of a binlog file.
Notice, that binlog has a ddl operation its
second applying may cause
case HA_ERR_TABLE_DEF_CHANGED:
case HA_ERR_CANNOT_ADD_FOREIGN:
which are not included into to the list.
Note that HA_ERR_RECORD_DELETED is not in the list since
do_exec_row() should not return that error code.
*/
case HA_ERR_RECORD_CHANGED:
case HA_ERR_KEY_NOT_FOUND:
case HA_ERR_END_OF_FILE:
case HA_ERR_FOUND_DUPP_KEY:
case HA_ERR_FOUND_DUPP_UNIQUE:
case HA_ERR_FOREIGN_DUPLICATE_KEY:
case HA_ERR_NO_REFERENCED_ROW:
case HA_ERR_ROW_IS_REFERENCED:
ret= 1;
break;
default:
ret= 0;
break;
}
return (ret);
}
/**
Ignore error code specified on command line.
*/
inline int ignored_error_code(int err_code)
{
#ifdef HAVE_NDB_BINLOG
/*
The following error codes are hard-coded and will always be ignored.
*/
switch (err_code)
{
case ER_DB_CREATE_EXISTS:
case ER_DB_DROP_EXISTS:
return 1;
default:
/* Nothing to do */
break;
}
#endif
return ((err_code == ER_SLAVE_IGNORED_TABLE) ||
(use_slave_mask && bitmap_is_set(&slave_error_mask, err_code)));
}
/*
This function converts an engine's error to a server error.
If the thread does not have an error already reported, it tries to
define it by calling the engine's method print_error. However, if a
mapping is not found, it uses the ER_UNKNOWN_ERROR and prints out a
warning message.
*/
int convert_handler_error(int error, THD* thd, TABLE *table)
{
uint actual_error= (thd->is_error() ? thd->main_da.sql_errno() :
0);
if (actual_error == 0)
{
table->file->print_error(error, MYF(0));
actual_error= (thd->is_error() ? thd->main_da.sql_errno() :
ER_UNKNOWN_ERROR);
if (actual_error == ER_UNKNOWN_ERROR)
if (global_system_variables.log_warnings)
sql_print_warning("Unknown error detected %d in handler", error);
}
return (actual_error);
}
inline bool concurrency_error_code(int error)
{
switch (error)
{
case ER_LOCK_WAIT_TIMEOUT:
case ER_LOCK_DEADLOCK:
case ER_XA_RBDEADLOCK:
return TRUE;
default:
return (FALSE);
}
}
inline bool unexpected_error_code(int unexpected_error)
{
switch (unexpected_error)
{
case ER_NET_READ_ERROR:
case ER_NET_ERROR_ON_WRITE:
case ER_QUERY_INTERRUPTED:
case ER_SERVER_SHUTDOWN:
case ER_NEW_ABORTING_CONNECTION:
return(TRUE);
default:
return(FALSE);
}
}
/*
pretty_print_str()
*/
static char *pretty_print_str(char *packet, const char *str, int len)
{
const char *end= str + len;
char *pos= packet;
*pos++= '\'';
while (str < end)
{
char c;
switch ((c=*str++)) {
case '\n': *pos++= '\\'; *pos++= 'n'; break;
case '\r': *pos++= '\\'; *pos++= 'r'; break;
case '\\': *pos++= '\\'; *pos++= '\\'; break;
case '\b': *pos++= '\\'; *pos++= 'b'; break;
case '\t': *pos++= '\\'; *pos++= 't'; break;
case '\'': *pos++= '\\'; *pos++= '\''; break;
case 0 : *pos++= '\\'; *pos++= '0'; break;
default:
*pos++= c;
break;
}
}
*pos++= '\'';
return pos;
}
#endif /* !MYSQL_CLIENT */
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
/**
Creates a temporary name for load data infile:.
@param buf Store new filename here
@param file_id File_id (part of file name)
@param event_server_id Event_id (part of file name)
@param ext Extension for file name
@return
Pointer to start of extension
*/
static char *slave_load_file_stem(char *buf, uint file_id,
int event_server_id, const char *ext)
{
char *res;
fn_format(buf,PREFIX_SQL_LOAD,slave_load_tmpdir, "", MY_UNPACK_FILENAME);
to_unix_path(buf);
buf = strend(buf);
buf = int10_to_str(::server_id, buf, 10);
*buf++ = '-';
buf = int10_to_str(event_server_id, buf, 10);
*buf++ = '-';
res= int10_to_str(file_id, buf, 10);
strmov(res, ext); // Add extension last
return res; // Pointer to extension
}
#endif
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
/**
Delete all temporary files used for SQL_LOAD.
*/
static void cleanup_load_tmpdir()
{
MY_DIR *dirp;
FILEINFO *file;
uint i;
char fname[FN_REFLEN], prefbuf[31], *p;
if (!(dirp=my_dir(slave_load_tmpdir,MYF(0))))
return;
/*
When we are deleting temporary files, we should only remove
the files associated with the server id of our server.
We don't use event_server_id here because since we've disabled
direct binlogging of Create_file/Append_file/Exec_load events
we cannot meet Start_log event in the middle of events from one
LOAD DATA.
*/
p= strmake(prefbuf, STRING_WITH_LEN(PREFIX_SQL_LOAD));
p= int10_to_str(::server_id, p, 10);
*(p++)= '-';
*p= 0;
for (i=0 ; i < (uint)dirp->number_off_files; i++)
{
file=dirp->dir_entry+i;
if (is_prefix(file->name, prefbuf))
{
fn_format(fname,file->name,slave_load_tmpdir,"",MY_UNPACK_FILENAME);
my_delete(fname, MYF(0));
}
}
my_dirend(dirp);
}
#endif
/*
write_str()
*/
static bool write_str(IO_CACHE *file, const char *str, uint length)
{
uchar tmp[1];
tmp[0]= (uchar) length;
return (my_b_safe_write(file, tmp, sizeof(tmp)) ||
my_b_safe_write(file, (uchar*) str, length));
}
/*
read_str()
*/
static inline int read_str(const char **buf, const char *buf_end,
const char **str, uint8 *len)
{
if (*buf + ((uint) (uchar) **buf) >= buf_end)
return 1;
*len= (uint8) **buf;
*str= (*buf)+1;
(*buf)+= (uint) *len+1;
return 0;
}
/**
Transforms a string into "" or its expression in 0x... form.
*/
char *str_to_hex(char *to, const char *from, uint len)
{
if (len)
{
*to++= '0';
*to++= 'x';
to= octet2hex(to, from, len);
}
else
to= strmov(to, "\"\"");
return to; // pointer to end 0 of 'to'
}
#ifndef MYSQL_CLIENT
/**
Append a version of the 'from' string suitable for use in a query to
the 'to' string. To generate a correct escaping, the character set
information in 'csinfo' is used.
*/
int
append_query_string(CHARSET_INFO *csinfo,
String const *from, String *to)
{
char *beg, *ptr;
uint32 const orig_len= to->length();
if (to->reserve(orig_len + from->length()*2+3))
return 1;
beg= to->c_ptr_quick() + to->length();
ptr= beg;
if (csinfo->escape_with_backslash_is_dangerous)
ptr= str_to_hex(ptr, from->ptr(), from->length());
else
{
*ptr++= '\'';
ptr+= escape_string_for_mysql(csinfo, ptr, 0,
from->ptr(), from->length());
*ptr++='\'';
}
to->length(orig_len + ptr - beg);
return 0;
}
#endif
/**
Prints a "session_var=value" string. Used by mysqlbinlog to print some SET
commands just before it prints a query.
*/
#ifdef MYSQL_CLIENT
static void print_set_option(IO_CACHE* file, uint32 bits_changed,
uint32 option, uint32 flags, const char* name,
bool* need_comma)
{
if (bits_changed & option)
{
if (*need_comma)
my_b_printf(file,", ");
my_b_printf(file,"%s=%d", name, test(flags & option));
*need_comma= 1;
}
}
#endif
/**************************************************************************
Log_event methods (= the parent class of all events)
**************************************************************************/
/**
@return
returns the human readable name of the event's type
*/
const char* Log_event::get_type_str(Log_event_type type)
{
switch(type) {
case START_EVENT_V3: return "Start_v3";
case STOP_EVENT: return "Stop";
case QUERY_EVENT: return "Query";
case ROTATE_EVENT: return "Rotate";
case INTVAR_EVENT: return "Intvar";
case LOAD_EVENT: return "Load";
case NEW_LOAD_EVENT: return "New_load";
case SLAVE_EVENT: return "Slave";
case CREATE_FILE_EVENT: return "Create_file";
case APPEND_BLOCK_EVENT: return "Append_block";
case DELETE_FILE_EVENT: return "Delete_file";
case EXEC_LOAD_EVENT: return "Exec_load";
case RAND_EVENT: return "RAND";
case XID_EVENT: return "Xid";
case USER_VAR_EVENT: return "User var";
case FORMAT_DESCRIPTION_EVENT: return "Format_desc";
case TABLE_MAP_EVENT: return "Table_map";
case PRE_GA_WRITE_ROWS_EVENT: return "Write_rows_event_old";
case PRE_GA_UPDATE_ROWS_EVENT: return "Update_rows_event_old";
case PRE_GA_DELETE_ROWS_EVENT: return "Delete_rows_event_old";
case WRITE_ROWS_EVENT: return "Write_rows";
case UPDATE_ROWS_EVENT: return "Update_rows";
case DELETE_ROWS_EVENT: return "Delete_rows";
case BEGIN_LOAD_QUERY_EVENT: return "Begin_load_query";
case EXECUTE_LOAD_QUERY_EVENT: return "Execute_load_query";
case INCIDENT_EVENT: return "Incident";
default: return "Unknown"; /* impossible */
}
}
const char* Log_event::get_type_str()
{
return get_type_str(get_type_code());
}
/*
Log_event::Log_event()
*/
#ifndef MYSQL_CLIENT
Log_event::Log_event(THD* thd_arg, uint16 flags_arg, bool using_trans)
:log_pos(0), temp_buf(0), exec_time(0), flags(flags_arg), thd(thd_arg)
{
server_id= thd->server_id;
when= thd->start_time;
cache_stmt= using_trans;
}
/**
This minimal constructor is for when you are not even sure that there
is a valid THD. For example in the server when we are shutting down or
flushing logs after receiving a SIGHUP (then we must write a Rotate to
the binlog but we have no THD, so we need this minimal constructor).
*/
Log_event::Log_event()
:temp_buf(0), exec_time(0), flags(0), cache_stmt(0),
thd(0)
{
server_id= ::server_id;
/*
We can't call my_time() here as this would cause a call before
my_init() is called
*/
when= 0;
log_pos= 0;
}
#endif /* !MYSQL_CLIENT */
/*
Log_event::Log_event()
*/
Log_event::Log_event(const char* buf,
const Format_description_log_event* description_event)
:temp_buf(0), cache_stmt(0)
{
#ifndef MYSQL_CLIENT
thd = 0;
#endif
when = uint4korr(buf);
server_id = uint4korr(buf + SERVER_ID_OFFSET);
data_written= uint4korr(buf + EVENT_LEN_OFFSET);
if (description_event->binlog_version==1)
{
log_pos= 0;
flags= 0;
return;
}
/* 4.0 or newer */
log_pos= uint4korr(buf + LOG_POS_OFFSET);
/*
If the log is 4.0 (so here it can only be a 4.0 relay log read by
the SQL thread or a 4.0 master binlog read by the I/O thread),
log_pos is the beginning of the event: we transform it into the end
of the event, which is more useful.
But how do you know that the log is 4.0: you know it if
description_event is version 3 *and* you are not reading a
Format_desc (remember that mysqlbinlog starts by assuming that 5.0
logs are in 4.0 format, until it finds a Format_desc).
*/
if (description_event->binlog_version==3 &&
buf[EVENT_TYPE_OFFSET]<FORMAT_DESCRIPTION_EVENT && log_pos)
{
/*
If log_pos=0, don't change it. log_pos==0 is a marker to mean
"don't change rli->group_master_log_pos" (see
inc_group_relay_log_pos()). As it is unreal log_pos, adding the
event len's is nonsense. For example, a fake Rotate event should
not have its log_pos (which is 0) changed or it will modify
Exec_master_log_pos in SHOW SLAVE STATUS, displaying a nonsense
value of (a non-zero offset which does not exist in the master's
binlog, so which will cause problems if the user uses this value
in CHANGE MASTER).
*/
log_pos+= data_written; /* purecov: inspected */
}
DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));
flags= uint2korr(buf + FLAGS_OFFSET);
if ((buf[EVENT_TYPE_OFFSET] == FORMAT_DESCRIPTION_EVENT) ||
(buf[EVENT_TYPE_OFFSET] == ROTATE_EVENT))
{
/*
These events always have a header which stops here (i.e. their
header is FROZEN).
*/
/*
Initialization to zero of all other Log_event members as they're
not specified. Currently there are no such members; in the future
there will be an event UID (but Format_description and Rotate
don't need this UID, as they are not propagated through
--log-slave-updates (remember the UID is used to not play a query
twice when you have two masters which are slaves of a 3rd master).
Then we are done.
*/
return;
}
/* otherwise, go on with reading the header from buf (nothing now) */
}
#ifndef MYSQL_CLIENT
#ifdef HAVE_REPLICATION
int Log_event::do_update_pos(Relay_log_info *rli)
{
/*
rli is null when (as far as I (Guilhem) know) the caller is
Load_log_event::do_apply_event *and* that one is called from
Execute_load_log_event::do_apply_event. In this case, we don't
do anything here ; Execute_load_log_event::do_apply_event will
call Log_event::do_apply_event again later with the proper rli.
Strictly speaking, if we were sure that rli is null only in the
case discussed above, 'if (rli)' is useless here. But as we are
not 100% sure, keep it for now.
Matz: I don't think we will need this check with this refactoring.
*/
if (rli)
{
/*
bug#29309 simulation: resetting the flag to force
wrong behaviour of artificial event to update
rli->last_master_timestamp for only one time -
the first FLUSH LOGS in the test.
*/
DBUG_EXECUTE_IF("let_first_flush_log_change_timestamp",
if (debug_not_change_ts_if_art_event == 1
&& is_artificial_event())
{
debug_not_change_ts_if_art_event= 0;
});
#ifndef DBUG_OFF
rli->stmt_done(log_pos,
is_artificial_event() &&
debug_not_change_ts_if_art_event > 0 ? 0 : when);
#else
rli->stmt_done(log_pos, is_artificial_event()? 0 : when);
#endif
DBUG_EXECUTE_IF("let_first_flush_log_change_timestamp",
if (debug_not_change_ts_if_art_event == 0)
{
debug_not_change_ts_if_art_event= 2;
});
}
return 0; // Cannot fail currently
}
Log_event::enum_skip_reason
Log_event::do_shall_skip(Relay_log_info *rli)
{
DBUG_PRINT("info", ("ev->server_id=%lu, ::server_id=%lu,"
" rli->replicate_same_server_id=%d,"
" rli->slave_skip_counter=%d",
(ulong) server_id, (ulong) ::server_id,
rli->replicate_same_server_id,
rli->slave_skip_counter));
if ((server_id == ::server_id && !rli->replicate_same_server_id) ||
(rli->slave_skip_counter == 1 && rli->is_in_group()))
return EVENT_SKIP_IGNORE;
else if (rli->slave_skip_counter > 0)
return EVENT_SKIP_COUNT;
else
return EVENT_SKIP_NOT;
}
/*
Log_event::pack_info()
*/
void Log_event::pack_info(Protocol *protocol)
{
protocol->store("", &my_charset_bin);
}
/**
Only called by SHOW BINLOG EVENTS
*/
int Log_event::net_send(Protocol *protocol, const char* log_name, my_off_t pos)
{
const char *p= strrchr(log_name, FN_LIBCHAR);
const char *event_type;
if (p)
log_name = p + 1;
protocol->prepare_for_resend();
protocol->store(log_name, &my_charset_bin);
protocol->store((ulonglong) pos);
event_type = get_type_str();
protocol->store(event_type, strlen(event_type), &my_charset_bin);
protocol->store((uint32) server_id);
protocol->store((ulonglong) log_pos);
pack_info(protocol);
return protocol->write();
}
#endif /* HAVE_REPLICATION */
/**
init_show_field_list() prepares the column names and types for the
output of SHOW BINLOG EVENTS; it is used only by SHOW BINLOG
EVENTS.
*/
void Log_event::init_show_field_list(List<Item>* field_list)
{
field_list->push_back(new Item_empty_string("Log_name", 20));
field_list->push_back(new Item_return_int("Pos", MY_INT32_NUM_DECIMAL_DIGITS,
MYSQL_TYPE_LONGLONG));
field_list->push_back(new Item_empty_string("Event_type", 20));
field_list->push_back(new Item_return_int("Server_id", 10,
MYSQL_TYPE_LONG));
field_list->push_back(new Item_return_int("End_log_pos",
MY_INT32_NUM_DECIMAL_DIGITS,
MYSQL_TYPE_LONGLONG));
field_list->push_back(new Item_empty_string("Info", 20));
}
/*
Log_event::write()
*/
bool Log_event::write_header(IO_CACHE* file, ulong event_data_length)
{
uchar header[LOG_EVENT_HEADER_LEN];
ulong now;
DBUG_ENTER("Log_event::write_header");
/* Store number of bytes that will be written by this event */
data_written= event_data_length + sizeof(header);
/*
log_pos != 0 if this is relay-log event. In this case we should not
change the position
*/
if (is_artificial_event())
{
/*
Artificial events are automatically generated and do not exist
in master's binary log, so log_pos should be set to 0.
*/
log_pos= 0;
}
else if (!log_pos)
{
/*
Calculate position of end of event
Note that with a SEQ_READ_APPEND cache, my_b_tell() does not
work well. So this will give slightly wrong positions for the
Format_desc/Rotate/Stop events which the slave writes to its
relay log. For example, the initial Format_desc will have
end_log_pos=91 instead of 95. Because after writing the first 4
bytes of the relay log, my_b_tell() still reports 0. Because
my_b_append() does not update the counter which my_b_tell()
later uses (one should probably use my_b_append_tell() to work
around this). To get right positions even when writing to the
relay log, we use the (new) my_b_safe_tell().
Note that this raises a question on the correctness of all these
DBUG_ASSERT(my_b_tell()=rli->event_relay_log_pos).
If in a transaction, the log_pos which we calculate below is not
very good (because then my_b_safe_tell() returns start position
of the BEGIN, so it's like the statement was at the BEGIN's
place), but it's not a very serious problem (as the slave, when
it is in a transaction, does not take those end_log_pos into
account (as it calls inc_event_relay_log_pos()). To be fixed
later, so that it looks less strange. But not bug.
*/
log_pos= my_b_safe_tell(file)+data_written;
}
now= (ulong) get_time(); // Query start time
/*
Header will be of size LOG_EVENT_HEADER_LEN for all events, except for
FORMAT_DESCRIPTION_EVENT and ROTATE_EVENT, where it will be
LOG_EVENT_MINIMAL_HEADER_LEN (remember these 2 have a frozen header,
because we read them before knowing the format).
*/
int4store(header, now); // timestamp
header[EVENT_TYPE_OFFSET]= get_type_code();
int4store(header+ SERVER_ID_OFFSET, server_id);
int4store(header+ EVENT_LEN_OFFSET, data_written);
int4store(header+ LOG_POS_OFFSET, log_pos);
int2store(header+ FLAGS_OFFSET, flags);
DBUG_RETURN(my_b_safe_write(file, header, sizeof(header)) != 0);
}
/**
This needn't be format-tolerant, because we only read
LOG_EVENT_MINIMAL_HEADER_LEN (we just want to read the event's length).
*/
int Log_event::read_log_event(IO_CACHE* file, String* packet,
pthread_mutex_t* log_lock)
{
ulong data_len;
int result=0;
char buf[LOG_EVENT_MINIMAL_HEADER_LEN];
DBUG_ENTER("Log_event::read_log_event");
if (log_lock)
pthread_mutex_lock(log_lock);
if (my_b_read(file, (uchar*) buf, sizeof(buf)))
{
/*
If the read hits eof, we must report it as eof so the caller
will know it can go into cond_wait to be woken up on the next
update to the log.
*/
DBUG_PRINT("error",("file->error: %d", file->error));
if (!file->error)
result= LOG_READ_EOF;
else
result= (file->error > 0 ? LOG_READ_TRUNC : LOG_READ_IO);
goto end;
}
data_len= uint4korr(buf + EVENT_LEN_OFFSET);
if (data_len < LOG_EVENT_MINIMAL_HEADER_LEN ||
data_len > current_thd->variables.max_allowed_packet)
{
DBUG_PRINT("error",("data_len: %ld", data_len));
result= ((data_len < LOG_EVENT_MINIMAL_HEADER_LEN) ? LOG_READ_BOGUS :
LOG_READ_TOO_LARGE);
goto end;
}
/* Append the log event header to packet */
if (packet->append(buf, sizeof(buf)))
{
/* Failed to allocate packet */
result= LOG_READ_MEM;
goto end;
}
data_len-= LOG_EVENT_MINIMAL_HEADER_LEN;
if (data_len)
{
/* Append rest of event, read directly from file into packet */
if (packet->append(file, data_len))
{
/*
Fatal error occured when appending rest of the event
to packet, possible failures:
1. EOF occured when reading from file, it's really an error
as data_len is >=0 there's supposed to be more bytes available.
file->error will have been set to number of bytes left to read
2. Read was interrupted, file->error would normally be set to -1
3. Failed to allocate memory for packet, my_errno
will be ENOMEM(file->error shuold be 0, but since the
memory allocation occurs before the call to read it might
be uninitialized)
*/
result= (my_errno == ENOMEM ? LOG_READ_MEM :
(file->error >= 0 ? LOG_READ_TRUNC: LOG_READ_IO));
/* Implicit goto end; */
}
}
end:
if (log_lock)
pthread_mutex_unlock(log_lock);
DBUG_RETURN(result);
}
#endif /* !MYSQL_CLIENT */
#ifndef MYSQL_CLIENT
#define UNLOCK_MUTEX if (log_lock) pthread_mutex_unlock(log_lock);
#define LOCK_MUTEX if (log_lock) pthread_mutex_lock(log_lock);
#else
#define UNLOCK_MUTEX
#define LOCK_MUTEX
#endif
#ifndef MYSQL_CLIENT
/**
@note
Allocates memory; The caller is responsible for clean-up.
*/
Log_event* Log_event::read_log_event(IO_CACHE* file,
pthread_mutex_t* log_lock,
const Format_description_log_event
*description_event)
#else
Log_event* Log_event::read_log_event(IO_CACHE* file,
const Format_description_log_event
*description_event)
#endif
{
DBUG_ENTER("Log_event::read_log_event");
DBUG_ASSERT(description_event != 0);
char head[LOG_EVENT_MINIMAL_HEADER_LEN];
/*
First we only want to read at most LOG_EVENT_MINIMAL_HEADER_LEN, just to
check the event for sanity and to know its length; no need to really parse
it. We say "at most" because this could be a 3.23 master, which has header
of 13 bytes, whereas LOG_EVENT_MINIMAL_HEADER_LEN is 19 bytes (it's
"minimal" over the set {MySQL >=4.0}).
*/
uint header_size= min(description_event->common_header_len,
LOG_EVENT_MINIMAL_HEADER_LEN);
LOCK_MUTEX;
DBUG_PRINT("info", ("my_b_tell: %lu", (ulong) my_b_tell(file)));
if (my_b_read(file, (uchar *) head, header_size))
{
DBUG_PRINT("info", ("Log_event::read_log_event(IO_CACHE*,Format_desc*) \
failed my_b_read"));
UNLOCK_MUTEX;
/*
No error here; it could be that we are at the file's end. However
if the next my_b_read() fails (below), it will be an error as we
were able to read the first bytes.
*/
DBUG_RETURN(0);
}
uint data_len = uint4korr(head + EVENT_LEN_OFFSET);
char *buf= 0;
const char *error= 0;
Log_event *res= 0;
#ifndef max_allowed_packet
THD *thd=current_thd;
uint max_allowed_packet= thd ? thd->variables.max_allowed_packet : ~(ulong)0;
#endif
if (data_len > max_allowed_packet)
{
error = "Event too big";
goto err;
}
if (data_len < header_size)
{
error = "Event too small";
goto err;
}
// some events use the extra byte to null-terminate strings
if (!(buf = (char*) my_malloc(data_len+1, MYF(MY_WME))))
{
error = "Out of memory";
goto err;
}
buf[data_len] = 0;
memcpy(buf, head, header_size);
if (my_b_read(file, (uchar*) buf + header_size, data_len - header_size))
{
error = "read error";
goto err;
}
if ((res= read_log_event(buf, data_len, &error, description_event)))
res->register_temp_buf(buf);
err:
UNLOCK_MUTEX;
if (!res)
{
DBUG_ASSERT(error != 0);
sql_print_error("Error in Log_event::read_log_event(): "
"'%s', data_len: %d, event_type: %d",
error,data_len,head[EVENT_TYPE_OFFSET]);
my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
/*
The SQL slave thread will check if file->error<0 to know
if there was an I/O error. Even if there is no "low-level" I/O errors
with 'file', any of the high-level above errors is worrying
enough to stop the SQL thread now ; as we are skipping the current event,
going on with reading and successfully executing other events can
only corrupt the slave's databases. So stop.
*/
file->error= -1;
}
DBUG_RETURN(res);
}
/**
Binlog format tolerance is in (buf, event_len, description_event)
constructors.
*/
Log_event* Log_event::read_log_event(const char* buf, uint event_len,
const char **error,
const Format_description_log_event *description_event)
{
Log_event* ev;
DBUG_ENTER("Log_event::read_log_event(char*,...)");
DBUG_ASSERT(description_event != 0);
DBUG_PRINT("info", ("binlog_version: %d", description_event->binlog_version));
DBUG_DUMP("data", (unsigned char*) buf, event_len);
/* Check the integrity */
if (event_len < EVENT_LEN_OFFSET ||
buf[EVENT_TYPE_OFFSET] >= ENUM_END_EVENT ||
(uint) event_len != uint4korr(buf+EVENT_LEN_OFFSET))
{
*error="Sanity check failed"; // Needed to free buffer
DBUG_RETURN(NULL); // general sanity check - will fail on a partial read
}
uint event_type= buf[EVENT_TYPE_OFFSET];
if (event_type > description_event->number_of_event_types &&
event_type != FORMAT_DESCRIPTION_EVENT)
{
/*
It is unsafe to use the description_event if its post_header_len
array does not include the event type.
*/
DBUG_PRINT("error", ("event type %d found, but the current "
"Format_description_log_event supports only %d event "
"types", event_type,
description_event->number_of_event_types));
ev= NULL;
}
else
{
/*
In some previuos versions (see comment in
Format_description_log_event::Format_description_log_event(char*,...)),
event types were assigned different id numbers than in the
present version. In order to replicate from such versions to the
present version, we must map those event type id's to our event
type id's. The mapping is done with the event_type_permutation
array, which was set up when the Format_description_log_event
was read.
*/
if (description_event->event_type_permutation)
{
IF_DBUG({
int new_event_type=
description_event->event_type_permutation[event_type];
DBUG_PRINT("info",
("converting event type %d to %d (%s)",
event_type, new_event_type,
get_type_str((Log_event_type)new_event_type)));
});
event_type= description_event->event_type_permutation[event_type];
}
switch(event_type) {
case QUERY_EVENT:
ev = new Query_log_event(buf, event_len, description_event, QUERY_EVENT);
break;
case LOAD_EVENT:
ev = new Load_log_event(buf, event_len, description_event);
break;
case NEW_LOAD_EVENT:
ev = new Load_log_event(buf, event_len, description_event);
break;
case ROTATE_EVENT:
ev = new Rotate_log_event(buf, event_len, description_event);
break;
#ifdef HAVE_REPLICATION
case SLAVE_EVENT: /* can never happen (unused event) */
ev = new Slave_log_event(buf, event_len, description_event);
break;
#endif /* HAVE_REPLICATION */
case CREATE_FILE_EVENT:
ev = new Create_file_log_event(buf, event_len, description_event);
break;
case APPEND_BLOCK_EVENT:
ev = new Append_block_log_event(buf, event_len, description_event);
break;
case DELETE_FILE_EVENT:
ev = new Delete_file_log_event(buf, event_len, description_event);
break;
case EXEC_LOAD_EVENT:
ev = new Execute_load_log_event(buf, event_len, description_event);
break;
case START_EVENT_V3: /* this is sent only by MySQL <=4.x */
ev = new Start_log_event_v3(buf, description_event);
break;
case STOP_EVENT:
ev = new Stop_log_event(buf, description_event);
break;
case INTVAR_EVENT:
ev = new Intvar_log_event(buf, description_event);
break;
case XID_EVENT:
ev = new Xid_log_event(buf, description_event);
break;
case RAND_EVENT:
ev = new Rand_log_event(buf, description_event);
break;
case USER_VAR_EVENT:
ev = new User_var_log_event(buf, description_event);
break;
case FORMAT_DESCRIPTION_EVENT:
ev = new Format_description_log_event(buf, event_len, description_event);
break;
#if defined(HAVE_REPLICATION)
case PRE_GA_WRITE_ROWS_EVENT:
ev = new Write_rows_log_event_old(buf, event_len, description_event);
break;
case PRE_GA_UPDATE_ROWS_EVENT:
ev = new Update_rows_log_event_old(buf, event_len, description_event);
break;
case PRE_GA_DELETE_ROWS_EVENT:
ev = new Delete_rows_log_event_old(buf, event_len, description_event);
break;
case WRITE_ROWS_EVENT:
ev = new Write_rows_log_event(buf, event_len, description_event);
break;
case UPDATE_ROWS_EVENT:
ev = new Update_rows_log_event(buf, event_len, description_event);
break;
case DELETE_ROWS_EVENT:
ev = new Delete_rows_log_event(buf, event_len, description_event);
break;
case TABLE_MAP_EVENT:
ev = new Table_map_log_event(buf, event_len, description_event);
break;
#endif
case BEGIN_LOAD_QUERY_EVENT:
ev = new Begin_load_query_log_event(buf, event_len, description_event);
break;
case EXECUTE_LOAD_QUERY_EVENT:
ev= new Execute_load_query_log_event(buf, event_len, description_event);
break;
case INCIDENT_EVENT:
ev = new Incident_log_event(buf, event_len, description_event);
break;
default:
DBUG_PRINT("error",("Unknown event code: %d",
(int) buf[EVENT_TYPE_OFFSET]));
ev= NULL;
break;
}
}
DBUG_PRINT("read_event", ("%s(type_code: %d; event_len: %d)",
ev ? ev->get_type_str() : "<unknown>",
buf[EVENT_TYPE_OFFSET],
event_len));
/*
is_valid() are small event-specific sanity tests which are
important; for example there are some my_malloc() in constructors
(e.g. Query_log_event::Query_log_event(char*...)); when these
my_malloc() fail we can't return an error out of the constructor
(because constructor is "void") ; so instead we leave the pointer we
wanted to allocate (e.g. 'query') to 0 and we test it in is_valid().
Same for Format_description_log_event, member 'post_header_len'.
SLAVE_EVENT is never used, so it should not be read ever.
*/
if (!ev || !ev->is_valid() || (event_type == SLAVE_EVENT))
{
DBUG_PRINT("error",("Found invalid event in binary log"));
delete ev;
#ifdef MYSQL_CLIENT
if (!force_opt) /* then mysqlbinlog dies */
{
*error= "Found invalid event in binary log";
DBUG_RETURN(0);
}
ev= new Unknown_log_event(buf, description_event);
#else
*error= "Found invalid event in binary log";
DBUG_RETURN(0);
#endif
}
DBUG_RETURN(ev);
}
#ifdef MYSQL_CLIENT
/*
Log_event::print_header()
*/
void Log_event::print_header(IO_CACHE* file,
PRINT_EVENT_INFO* print_event_info,
bool is_more __attribute__((unused)))
{
char llbuff[22];
my_off_t hexdump_from= print_event_info->hexdump_from;
DBUG_ENTER("Log_event::print_header");
my_b_printf(file, "#");
print_timestamp(file);
my_b_printf(file, " server id %lu end_log_pos %s ", (ulong) server_id,
llstr(log_pos,llbuff));
/* mysqlbinlog --hexdump */
if (print_event_info->hexdump_from)
{
my_b_printf(file, "\n");
uchar *ptr= (uchar*)temp_buf;
my_off_t size=
uint4korr(ptr + EVENT_LEN_OFFSET) - LOG_EVENT_MINIMAL_HEADER_LEN;
my_off_t i;
/* Header len * 4 >= header len * (2 chars + space + extra space) */
char *h, hex_string[LOG_EVENT_MINIMAL_HEADER_LEN*4]= {0};
char *c, char_string[16+1]= {0};
/* Pretty-print event common header if header is exactly 19 bytes */
if (print_event_info->common_header_len == LOG_EVENT_MINIMAL_HEADER_LEN)
{
char emit_buf[256]; // Enough for storing one line
my_b_printf(file, "# Position Timestamp Type Master ID "
"Size Master Pos Flags \n");
size_t const bytes_written=
my_snprintf(emit_buf, sizeof(emit_buf),
"# %8.8lx %02x %02x %02x %02x %02x "
"%02x %02x %02x %02x %02x %02x %02x %02x "
"%02x %02x %02x %02x %02x %02x\n",
(unsigned long) hexdump_from,
ptr[0], ptr[1], ptr[2], ptr[3], ptr[4], ptr[5], ptr[6],
ptr[7], ptr[8], ptr[9], ptr[10], ptr[11], ptr[12], ptr[13],
ptr[14], ptr[15], ptr[16], ptr[17], ptr[18]);
DBUG_ASSERT(static_cast<size_t>(bytes_written) < sizeof(emit_buf));
my_b_write(file, (uchar*) emit_buf, bytes_written);
ptr += LOG_EVENT_MINIMAL_HEADER_LEN;
hexdump_from += LOG_EVENT_MINIMAL_HEADER_LEN;
}
/* Rest of event (without common header) */
for (i= 0, c= char_string, h=hex_string;
i < size;
i++, ptr++)
{
my_snprintf(h, 4, "%02x ", *ptr);
h += 3;
*c++= my_isalnum(&my_charset_bin, *ptr) ? *ptr : '.';
if (i % 16 == 15)
{
/*
my_b_printf() does not support full printf() formats, so we
have to do it this way.
TODO: Rewrite my_b_printf() to support full printf() syntax.
*/
char emit_buf[256];
size_t const bytes_written=
my_snprintf(emit_buf, sizeof(emit_buf),
"# %8.8lx %-48.48s |%16s|\n",
(unsigned long) (hexdump_from + (i & 0xfffffff0)),
hex_string, char_string);
DBUG_ASSERT(static_cast<size_t>(bytes_written) < sizeof(emit_buf));
my_b_write(file, (uchar*) emit_buf, bytes_written);
hex_string[0]= 0;
char_string[0]= 0;
c= char_string;
h= hex_string;
}
else if (i % 8 == 7) *h++ = ' ';
}
*c= '\0';
if (hex_string[0])
{
char emit_buf[256];
size_t const bytes_written=
my_snprintf(emit_buf, sizeof(emit_buf),
"# %8.8lx %-48.48s |%s|\n",
(unsigned long) (hexdump_from + (i & 0xfffffff0)),
hex_string, char_string);
DBUG_ASSERT(static_cast<size_t>(bytes_written) < sizeof(emit_buf));
my_b_write(file, (uchar*) emit_buf, bytes_written);
}
/*
need a # to prefix the rest of printouts for example those of
Rows_log_event::print_helper().
*/
my_b_write(file, reinterpret_cast<const uchar*>("# "), 2);
}
DBUG_VOID_RETURN;
}
/**
Prints a quoted string to io cache.
Control characters are displayed as hex sequence, e.g. \x00
@param[in] file IO cache
@param[in] prt Pointer to string
@param[in] length String length
*/
static void
my_b_write_quoted(IO_CACHE *file, const uchar *ptr, uint length)
{
const uchar *s;
my_b_printf(file, "'");
for (s= ptr; length > 0 ; s++, length--)
{
if (*s > 0x1F)
my_b_write(file, s, 1);
else
{
uchar hex[10];
size_t len= my_snprintf((char*) hex, sizeof(hex), "%s%02x", "\\x", *s);
my_b_write(file, hex, len);
}
}
my_b_printf(file, "'");
}
/**
Prints a bit string to io cache in format b'1010'.
@param[in] file IO cache
@param[in] ptr Pointer to string
@param[in] nbits Number of bits
*/
static void
my_b_write_bit(IO_CACHE *file, const uchar *ptr, uint nbits)
{
uint bitnum, nbits8= ((nbits + 7) / 8) * 8, skip_bits= nbits8 - nbits;
my_b_printf(file, "b'");
for (bitnum= skip_bits ; bitnum < nbits8; bitnum++)
{
int is_set= (ptr[(bitnum) / 8] >> (7 - bitnum % 8)) & 0x01;
my_b_write(file, (const uchar*) (is_set ? "1" : "0"), 1);
}
my_b_printf(file, "'");
}
/**
Prints a packed string to io cache.
The string consists of length packed to 1 or 2 bytes,
followed by string data itself.
@param[in] file IO cache
@param[in] ptr Pointer to string
@param[in] length String size
@retval - number of bytes scanned.
*/
static size_t
my_b_write_quoted_with_length(IO_CACHE *file, const uchar *ptr, uint length)
{
if (length < 256)
{
length= *ptr;
my_b_write_quoted(file, ptr + 1, length);
return length + 1;
}
else
{
length= uint2korr(ptr);
my_b_write_quoted(file, ptr + 2, length);
return length + 2;
}
}
/**
Prints a 32-bit number in both signed and unsigned representation
@param[in] file IO cache
@param[in] sl Signed number
@param[in] ul Unsigned number
*/
static void
my_b_write_sint32_and_uint32(IO_CACHE *file, int32 si, uint32 ui)
{
my_b_printf(file, "%d", si);
if (si < 0)
my_b_printf(file, " (%u)", ui);
}
/**
Print a packed value of the given SQL type into IO cache
@param[in] file IO cache
@param[in] ptr Pointer to string
@param[in] type Column type
@param[in] meta Column meta information
@param[out] typestr SQL type string buffer (for verbose output)
@param[out] typestr_length Size of typestr
@retval - number of bytes scanned from ptr.
*/
static size_t
log_event_print_value(IO_CACHE *file, const uchar *ptr,
uint type, uint meta,
char *typestr, size_t typestr_length)
{
uint32 length= 0;
if (type == MYSQL_TYPE_STRING)
{
if (meta >= 256)
{
uint byte0= meta >> 8;
uint byte1= meta & 0xFF;
if ((byte0 & 0x30) != 0x30)
{
/* a long CHAR() field: see #37426 */
length= byte1 | (((byte0 & 0x30) ^ 0x30) << 4);
type= byte0 | 0x30;
goto beg;
}
switch (byte0)
{
case MYSQL_TYPE_SET:
case MYSQL_TYPE_ENUM:
case MYSQL_TYPE_STRING:
type= byte0;
length= byte1;
break;
default:
{
char tmp[5];
my_snprintf(tmp, sizeof(tmp), "%04X", meta);
my_b_printf(file,
"!! Don't know how to handle column type=%d meta=%d (%s)",
type, meta, tmp);
return 0;
}
}
}
else
length= meta;
}
beg:
switch (type) {
case MYSQL_TYPE_LONG:
{
int32 si= sint4korr(ptr);
uint32 ui= uint4korr(ptr);
my_b_write_sint32_and_uint32(file, si, ui);
my_snprintf(typestr, typestr_length, "INT");
return 4;
}
case MYSQL_TYPE_TINY:
{
my_b_write_sint32_and_uint32(file, (int) (signed char) *ptr,
(uint) (unsigned char) *ptr);
my_snprintf(typestr, typestr_length, "TINYINT");
return 1;
}
case MYSQL_TYPE_SHORT:
{
int32 si= (int32) sint2korr(ptr);
uint32 ui= (uint32) uint2korr(ptr);
my_b_write_sint32_and_uint32(file, si, ui);
my_snprintf(typestr, typestr_length, "SHORTINT");
return 2;
}
case MYSQL_TYPE_INT24:
{
int32 si= sint3korr(ptr);
uint32 ui= uint3korr(ptr);
my_b_write_sint32_and_uint32(file, si, ui);
my_snprintf(typestr, typestr_length, "MEDIUMINT");
return 3;
}
case MYSQL_TYPE_LONGLONG:
{
char tmp[64];
longlong si= sint8korr(ptr);
longlong10_to_str(si, tmp, -10);
my_b_printf(file, "%s", tmp);
if (si < 0)
{
ulonglong ui= uint8korr(ptr);
longlong10_to_str((longlong) ui, tmp, 10);
my_b_printf(file, " (%s)", tmp);
}
my_snprintf(typestr, typestr_length, "LONGINT");
return 8;
}
case MYSQL_TYPE_NEWDECIMAL:
{
uint precision= meta >> 8;
uint decimals= meta & 0xFF;
uint bin_size= my_decimal_get_binary_size(precision, decimals);
my_decimal dec;
binary2my_decimal(E_DEC_FATAL_ERROR, (uchar*) ptr, &dec,
precision, decimals);
int i, end;
char buff[512], *pos;
pos= buff;
pos+= sprintf(buff, "%s", dec.sign() ? "-" : "");
end= ROUND_UP(dec.frac) + ROUND_UP(dec.intg)-1;
for (i=0; i < end; i++)
pos+= sprintf(pos, "%09d.", dec.buf[i]);
pos+= sprintf(pos, "%09d", dec.buf[i]);
my_b_printf(file, "%s", buff);
my_snprintf(typestr, typestr_length, "DECIMAL(%d,%d)",
precision, decimals);
return bin_size;
}
case MYSQL_TYPE_FLOAT:
{
float fl;
float4get(fl, ptr);
char tmp[320];
sprintf(tmp, "%-20g", (double) fl);
my_b_printf(file, "%s", tmp); /* my_snprintf doesn't support %-20g */
my_snprintf(typestr, typestr_length, "FLOAT");
return 4;
}
case MYSQL_TYPE_DOUBLE:
{
double dbl;
float8get(dbl, ptr);
char tmp[320];
sprintf(tmp, "%-.20g", dbl); /* my_snprintf doesn't support %-20g */
my_b_printf(file, "%s", tmp);
strcpy(typestr, "DOUBLE");
return 8;
}
case MYSQL_TYPE_BIT:
{
/* Meta-data: bit_len, bytes_in_rec, 2 bytes */
uint nbits= ((meta >> 8) * 8) + (meta & 0xFF);
length= (nbits + 7) / 8;
my_b_write_bit(file, ptr, nbits);
my_snprintf(typestr, typestr_length, "BIT(%d)", nbits);
return length;
}
case MYSQL_TYPE_TIMESTAMP:
{
uint32 i32= uint4korr(ptr);
my_b_printf(file, "%d", i32);
my_snprintf(typestr, typestr_length, "TIMESTAMP");
return 4;
}
case MYSQL_TYPE_DATETIME:
{
size_t d, t;
uint64 i64= uint8korr(ptr); /* YYYYMMDDhhmmss */
d= i64 / 1000000;
t= i64 % 1000000;
my_b_printf(file, "%04d-%02d-%02d %02d:%02d:%02d",
d / 10000, (d % 10000) / 100, d % 100,
t / 10000, (t % 10000) / 100, t % 100);
my_snprintf(typestr, typestr_length, "DATETIME");
return 8;
}
case MYSQL_TYPE_TIME:
{
uint32 i32= uint3korr(ptr);
my_b_printf(file, "'%02d:%02d:%02d'",
i32 / 10000, (i32 % 10000) / 100, i32 % 100);
my_snprintf(typestr, typestr_length, "TIME");
return 3;
}
case MYSQL_TYPE_DATE:
{
uint i32= uint3korr(ptr);
my_b_printf(file , "'%04d:%02d:%02d'",
(i32 / (16L * 32L)), (i32 / 32L % 16L), (i32 % 32L));
my_snprintf(typestr, typestr_length, "DATE");
return 3;
}
case MYSQL_TYPE_YEAR:
{
uint32 i32= *ptr;
my_b_printf(file, "%04d", i32+ 1900);
my_snprintf(typestr, typestr_length, "YEAR");
return 1;
}
case MYSQL_TYPE_ENUM:
switch (length) {
case 1:
my_b_printf(file, "%d", (int) *ptr);
my_snprintf(typestr, typestr_length, "ENUM(1 byte)");
return 1;
case 2:
{
int32 i32= uint2korr(ptr);
my_b_printf(file, "%d", i32);
my_snprintf(typestr, typestr_length, "ENUM(2 bytes)");
return 2;
}
default:
my_b_printf(file, "!! Unknown ENUM packlen=%d", length);
return 0;
}
break;
case MYSQL_TYPE_SET:
my_b_write_bit(file, ptr , length * 8);
my_snprintf(typestr, typestr_length, "SET(%d bytes)", length);
return length;
case MYSQL_TYPE_BLOB:
switch (meta) {
case 1:
length= *ptr;
my_b_write_quoted(file, ptr + 1, length);
my_snprintf(typestr, typestr_length, "TINYBLOB/TINYTEXT");
return length + 1;
case 2:
length= uint2korr(ptr);
my_b_write_quoted(file, ptr + 2, length);
my_snprintf(typestr, typestr_length, "BLOB/TEXT");
return length + 2;
case 3:
length= uint3korr(ptr);
my_b_write_quoted(file, ptr + 3, length);
my_snprintf(typestr, typestr_length, "MEDIUMBLOB/MEDIUMTEXT");
return length + 3;
case 4:
length= uint4korr(ptr);
my_b_write_quoted(file, ptr + 4, length);
my_snprintf(typestr, typestr_length, "LONGBLOB/LONGTEXT");
return length + 4;
default:
my_b_printf(file, "!! Unknown BLOB packlen=%d", length);
return 0;
}
case MYSQL_TYPE_VARCHAR:
case MYSQL_TYPE_VAR_STRING:
length= meta;
my_snprintf(typestr, typestr_length, "VARSTRING(%d)", length);
return my_b_write_quoted_with_length(file, ptr, length);
case MYSQL_TYPE_STRING:
my_snprintf(typestr, typestr_length, "STRING(%d)", length);
return my_b_write_quoted_with_length(file, ptr, length);
default:
{
char tmp[5];
my_snprintf(tmp, sizeof(tmp), "%04x", meta);
my_b_printf(file,
"!! Don't know how to handle column type=%d meta=%d (%s)",
type, meta, tmp);
}
break;
}
*typestr= 0;
return 0;
}
/**
Print a packed row into IO cache
@param[in] file IO cache
@param[in] td Table definition
@param[in] print_event_into Print parameters
@param[in] cols_bitmap Column bitmaps.
@param[in] value Pointer to packed row
@param[in] prefix Row's SQL clause ("SET", "WHERE", etc)
@retval - number of bytes scanned.
*/
size_t
Rows_log_event::print_verbose_one_row(IO_CACHE *file, table_def *td,
PRINT_EVENT_INFO *print_event_info,
MY_BITMAP *cols_bitmap,
const uchar *value, const uchar *prefix)
{
const uchar *value0= value;
const uchar *null_bits= value;
uint null_bit_index= 0;
char typestr[64]= "";
value+= (m_width + 7) / 8;
my_b_printf(file, "%s", prefix);
for (size_t i= 0; i < td->size(); i ++)
{
int is_null= (null_bits[null_bit_index / 8]
>> (null_bit_index % 8)) & 0x01;
if (bitmap_is_set(cols_bitmap, i) == 0)
continue;
if (is_null)
{
my_b_printf(file, "### @%d=NULL", i + 1);
}
else
{
my_b_printf(file, "### @%d=", i + 1);
size_t size= log_event_print_value(file, value,
td->type(i), td->field_metadata(i),
typestr, sizeof(typestr));
if (!size)
return 0;
value+= size;
}
if (print_event_info->verbose > 1)
{
my_b_printf(file, " /* ");
if (typestr[0])
my_b_printf(file, "%s ", typestr);
else
my_b_printf(file, "type=%d ", td->type(i));
my_b_printf(file, "meta=%d nullable=%d is_null=%d ",
td->field_metadata(i),
td->maybe_null(i), is_null);
my_b_printf(file, "*/");
}
my_b_printf(file, "\n");
null_bit_index++;
}
return value - value0;
}
/**
Print a row event into IO cache in human readable form (in SQL format)
@param[in] file IO cache
@param[in] print_event_into Print parameters
*/
void Rows_log_event::print_verbose(IO_CACHE *file,
PRINT_EVENT_INFO *print_event_info)
{
Table_map_log_event *map;
table_def *td;
const char *sql_command, *sql_clause1, *sql_clause2;
Log_event_type type_code= get_type_code();
switch (type_code) {
case WRITE_ROWS_EVENT:
sql_command= "INSERT INTO";
sql_clause1= "### SET\n";
sql_clause2= NULL;
break;
case DELETE_ROWS_EVENT:
sql_command= "DELETE FROM";
sql_clause1= "### WHERE\n";
sql_clause2= NULL;
break;
case UPDATE_ROWS_EVENT:
sql_command= "UPDATE";
sql_clause1= "### WHERE\n";
sql_clause2= "### SET\n";
break;
default:
sql_command= sql_clause1= sql_clause2= NULL;
DBUG_ASSERT(0); /* Not possible */
}
if (!(map= print_event_info->m_table_map.get_table(m_table_id)) ||
!(td= map->create_table_def()))
{
my_b_printf(file, "### Row event for unknown table #%d", m_table_id);
return;
}
for (const uchar *value= m_rows_buf; value < m_rows_end; )
{
size_t length;
my_b_printf(file, "### %s %s.%s\n",
sql_command,
map->get_db_name(), map->get_table_name());
/* Print the first image */
if (!(length= print_verbose_one_row(file, td, print_event_info,
&m_cols, value,
(const uchar*) sql_clause1)))
goto end;
value+= length;
/* Print the second image (for UPDATE only) */
if (sql_clause2)
{
if (!(length= print_verbose_one_row(file, td, print_event_info,
&m_cols_ai, value,
(const uchar*) sql_clause2)))
goto end;
value+= length;
}
}
end:
delete td;
}
#ifdef MYSQL_CLIENT
void free_table_map_log_event(Table_map_log_event *event)
{
delete event;
}
#endif
void Log_event::print_base64(IO_CACHE* file,
PRINT_EVENT_INFO* print_event_info,
bool more)
{
const uchar *ptr= (const uchar *)temp_buf;
uint32 size= uint4korr(ptr + EVENT_LEN_OFFSET);
DBUG_ENTER("Log_event::print_base64");
size_t const tmp_str_sz= base64_needed_encoded_length((int) size);
char *const tmp_str= (char *) my_malloc(tmp_str_sz, MYF(MY_WME));
if (!tmp_str) {
fprintf(stderr, "\nError: Out of memory. "
"Could not print correct binlog event.\n");
DBUG_VOID_RETURN;
}
if (base64_encode(ptr, (size_t) size, tmp_str))
{
DBUG_ASSERT(0);
}
if (print_event_info->base64_output_mode != BASE64_OUTPUT_DECODE_ROWS)
{
if (my_b_tell(file) == 0)
my_b_printf(file, "\nBINLOG '\n");
my_b_printf(file, "%s\n", tmp_str);
if (!more)
my_b_printf(file, "'%s\n", print_event_info->delimiter);
}
if (print_event_info->verbose)
{
Rows_log_event *ev= NULL;
if (ptr[4] == TABLE_MAP_EVENT)
{
Table_map_log_event *map;
map= new Table_map_log_event((const char*) ptr, size,
glob_description_event);
print_event_info->m_table_map.set_table(map->get_table_id(), map);
}
else if (ptr[4] == WRITE_ROWS_EVENT)
{
ev= new Write_rows_log_event((const char*) ptr, size,
glob_description_event);
}
else if (ptr[4] == DELETE_ROWS_EVENT)
{
ev= new Delete_rows_log_event((const char*) ptr, size,
glob_description_event);
}
else if (ptr[4] == UPDATE_ROWS_EVENT)
{
ev= new Update_rows_log_event((const char*) ptr, size,
glob_description_event);
}
if (ev)
{
ev->print_verbose(file, print_event_info);
delete ev;
}
}
my_free(tmp_str, MYF(0));
DBUG_VOID_RETURN;
}
/*
Log_event::print_timestamp()
*/
void Log_event::print_timestamp(IO_CACHE* file, time_t* ts)
{
struct tm *res;
DBUG_ENTER("Log_event::print_timestamp");
if (!ts)
ts = &when;
#ifdef MYSQL_SERVER // This is always false
struct tm tm_tmp;
localtime_r(ts,(res= &tm_tmp));
#else
res=localtime(ts);
#endif
my_b_printf(file,"%02d%02d%02d %2d:%02d:%02d",
res->tm_year % 100,
res->tm_mon+1,
res->tm_mday,
res->tm_hour,
res->tm_min,
res->tm_sec);
DBUG_VOID_RETURN;
}
#endif /* MYSQL_CLIENT */
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
inline Log_event::enum_skip_reason
Log_event::continue_group(Relay_log_info *rli)
{
if (rli->slave_skip_counter == 1)
return Log_event::EVENT_SKIP_IGNORE;
return Log_event::do_shall_skip(rli);
}
#endif
/**************************************************************************
Query_log_event methods
**************************************************************************/
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
/**
This (which is used only for SHOW BINLOG EVENTS) could be updated to
print SET @@session_var=. But this is not urgent, as SHOW BINLOG EVENTS is
only an information, it does not produce suitable queries to replay (for
example it does not print LOAD DATA INFILE).
@todo
show the catalog ??
*/
void Query_log_event::pack_info(Protocol *protocol)
{
// TODO: show the catalog ??
char *buf, *pos;
if (!(buf= (char*) my_malloc(9 + db_len + q_len, MYF(MY_WME))))
return;
pos= buf;
if (!(flags & LOG_EVENT_SUPPRESS_USE_F)
&& db && db_len)
{
pos= strmov(buf, "use `");
memcpy(pos, db, db_len);
pos= strmov(pos+db_len, "`; ");
}
if (query && q_len)
{
memcpy(pos, query, q_len);
pos+= q_len;
}
protocol->store(buf, pos-buf, &my_charset_bin);
my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
}
#endif
#ifndef MYSQL_CLIENT
/**
Utility function for the next method (Query_log_event::write()) .
*/
static void write_str_with_code_and_len(uchar **dst, const char *src,
uint len, uint code)
{
/*
only 1 byte to store the length of catalog, so it should not
surpass 255
*/
DBUG_ASSERT(len <= 255);
DBUG_ASSERT(src);
*((*dst)++)= code;
*((*dst)++)= (uchar) len;
bmove(*dst, src, len);
(*dst)+= len;
}
/**
Query_log_event::write().
@note
In this event we have to modify the header to have the correct
EVENT_LEN_OFFSET as we don't yet know how many status variables we
will print!
*/
bool Query_log_event::write(IO_CACHE* file)
{
uchar buf[QUERY_HEADER_LEN + MAX_SIZE_LOG_EVENT_STATUS];
uchar *start, *start_of_status;
ulong event_length;
if (!query)
return 1; // Something wrong with event
/*
We want to store the thread id:
(- as an information for the user when he reads the binlog)
- if the query uses temporary table: for the slave SQL thread to know to
which master connection the temp table belongs.
Now imagine we (write()) are called by the slave SQL thread (we are
logging a query executed by this thread; the slave runs with
--log-slave-updates). Then this query will be logged with
thread_id=the_thread_id_of_the_SQL_thread. Imagine that 2 temp tables of
the same name were created simultaneously on the master (in the master
binlog you have
CREATE TEMPORARY TABLE t; (thread 1)
CREATE TEMPORARY TABLE t; (thread 2)
...)
then in the slave's binlog there will be
CREATE TEMPORARY TABLE t; (thread_id_of_the_slave_SQL_thread)
CREATE TEMPORARY TABLE t; (thread_id_of_the_slave_SQL_thread)
which is bad (same thread id!).
To avoid this, we log the thread's thread id EXCEPT for the SQL
slave thread for which we log the original (master's) thread id.
Now this moves the bug: what happens if the thread id on the
master was 10 and when the slave replicates the query, a
connection number 10 is opened by a normal client on the slave,
and updates a temp table of the same name? We get a problem
again. To avoid this, in the handling of temp tables (sql_base.cc)
we use thread_id AND server_id. TODO when this is merged into
4.1: in 4.1, slave_proxy_id has been renamed to pseudo_thread_id
and is a session variable: that's to make mysqlbinlog work with
temp tables. We probably need to introduce
SET PSEUDO_SERVER_ID
for mysqlbinlog in 4.1. mysqlbinlog would print:
SET PSEUDO_SERVER_ID=
SET PSEUDO_THREAD_ID=
for each query using temp tables.
*/
int4store(buf + Q_THREAD_ID_OFFSET, slave_proxy_id);
int4store(buf + Q_EXEC_TIME_OFFSET, exec_time);
buf[Q_DB_LEN_OFFSET] = (char) db_len;
int2store(buf + Q_ERR_CODE_OFFSET, error_code);
/*
You MUST always write status vars in increasing order of code. This
guarantees that a slightly older slave will be able to parse those he
knows.
*/
start_of_status= start= buf+QUERY_HEADER_LEN;
if (flags2_inited)
{
*start++= Q_FLAGS2_CODE;
int4store(start, flags2);
start+= 4;
}
if (sql_mode_inited)
{
*start++= Q_SQL_MODE_CODE;
int8store(start, (ulonglong)sql_mode);
start+= 8;
}
if (catalog_len) // i.e. this var is inited (false for 4.0 events)
{
write_str_with_code_and_len(&start,
catalog, catalog_len, Q_CATALOG_NZ_CODE);
/*
In 5.0.x where x<4 masters we used to store the end zero here. This was
a waste of one byte so we don't do it in x>=4 masters. We change code to
Q_CATALOG_NZ_CODE, because re-using the old code would make x<4 slaves
of this x>=4 master segfault (expecting a zero when there is
none). Remaining compatibility problems are: the older slave will not
find the catalog; but it is will not crash, and it's not an issue
that it does not find the catalog as catalogs were not used in these
older MySQL versions (we store it in binlog and read it from relay log
but do nothing useful with it). What is an issue is that the older slave
will stop processing the Q_* blocks (and jumps to the db/query) as soon
as it sees unknown Q_CATALOG_NZ_CODE; so it will not be able to read
Q_AUTO_INCREMENT*, Q_CHARSET and so replication will fail silently in
various ways. Documented that you should not mix alpha/beta versions if
they are not exactly the same version, with example of 5.0.3->5.0.2 and
5.0.4->5.0.3. If replication is from older to new, the new will
recognize Q_CATALOG_CODE and have no problem.
*/
}
if (auto_increment_increment != 1 || auto_increment_offset != 1)
{
*start++= Q_AUTO_INCREMENT;
int2store(start, auto_increment_increment);
int2store(start+2, auto_increment_offset);
start+= 4;
}
if (charset_inited)
{
*start++= Q_CHARSET_CODE;
memcpy(start, charset, 6);
start+= 6;
}
if (time_zone_len)
{
/* In the TZ sys table, column Name is of length 64 so this should be ok */
DBUG_ASSERT(time_zone_len <= MAX_TIME_ZONE_NAME_LENGTH);
write_str_with_code_and_len(&start,
time_zone_str, time_zone_len, Q_TIME_ZONE_CODE);
}
if (lc_time_names_number)
{
DBUG_ASSERT(lc_time_names_number <= 0xFFFF);
*start++= Q_LC_TIME_NAMES_CODE;
int2store(start, lc_time_names_number);
start+= 2;
}
if (charset_database_number)
{
DBUG_ASSERT(charset_database_number <= 0xFFFF);
*start++= Q_CHARSET_DATABASE_CODE;
int2store(start, charset_database_number);
start+= 2;
}
if (table_map_for_update)
{
*start++= Q_TABLE_MAP_FOR_UPDATE_CODE;
int8store(start, table_map_for_update);
start+= 8;
}
if (master_data_written != 0)
{
/*
Q_MASTER_DATA_WRITTEN_CODE only exists in relay logs where the master
has binlog_version<4 and the slave has binlog_version=4. See comment
for master_data_written in log_event.h for details.
*/
*start++= Q_MASTER_DATA_WRITTEN_CODE;
int4store(start, master_data_written);
start+= 4;
}
if (thd && thd->need_binlog_invoker())
{
LEX_STRING user;
LEX_STRING host;
memset(&user, 0, sizeof(user));
memset(&host, 0, sizeof(host));
if (thd->slave_thread && thd->has_invoker())
{
/* user will be null, if master is older than this patch */
user= thd->get_invoker_user();
host= thd->get_invoker_host();
}
else if (thd->security_ctx->priv_user)
{
Security_context *ctx= thd->security_ctx;
user.length= strlen(ctx->priv_user);
user.str= ctx->priv_user;
if (ctx->priv_host[0] != '\0')
{
host.str= ctx->priv_host;
host.length= strlen(ctx->priv_host);
}
}
if (user.length > 0)
{
*start++= Q_INVOKER;
/*
Store user length and user. The max length of use is 16, so 1 byte is
enough to store the user's length.
*/
*start++= (uchar)user.length;
memcpy(start, user.str, user.length);
start+= user.length;
/*
Store host length and host. The max length of host is 60, so 1 byte is
enough to store the host's length.
*/
*start++= (uchar)host.length;
memcpy(start, host.str, host.length);
start+= host.length;
}
}
/*
NOTE: When adding new status vars, please don't forget to update
the MAX_SIZE_LOG_EVENT_STATUS in log_event.h and update the function
code_name() in this file.
Here there could be code like
if (command-line-option-which-says-"log_this_variable" && inited)
{
*start++= Q_THIS_VARIABLE_CODE;
int4store(start, this_variable);
start+= 4;
}
*/
/* Store length of status variables */
status_vars_len= (uint) (start-start_of_status);
DBUG_ASSERT(status_vars_len <= MAX_SIZE_LOG_EVENT_STATUS);
int2store(buf + Q_STATUS_VARS_LEN_OFFSET, status_vars_len);
/*
Calculate length of whole event
The "1" below is the \0 in the db's length
*/
event_length= (uint) (start-buf) + get_post_header_size_for_derived() + db_len + 1 + q_len;
return (write_header(file, event_length) ||
my_b_safe_write(file, (uchar*) buf, QUERY_HEADER_LEN) ||
write_post_header_for_derived(file) ||
my_b_safe_write(file, (uchar*) start_of_status,
(uint) (start-start_of_status)) ||
my_b_safe_write(file, (db) ? (uchar*) db : (uchar*)"", db_len + 1) ||
my_b_safe_write(file, (uchar*) query, q_len)) ? 1 : 0;
}
/**
The simplest constructor that could possibly work. This is used for
creating static objects that have a special meaning and are invisible
to the log.
*/
Query_log_event::Query_log_event()
:Log_event(), data_buf(0)
{
memset(&user, 0, sizeof(user));
memset(&host, 0, sizeof(host));
}
/*
SYNOPSIS
Query_log_event::Query_log_event()
thd_arg - thread handle
query_arg - array of char representing the query
query_length - size of the `query_arg' array
using_trans - there is a modified transactional table
suppress_use - suppress the generation of 'USE' statements
errcode - the error code of the query
DESCRIPTION
Creates an event for binlogging
The value for `errcode' should be supplied by caller.
*/
Query_log_event::Query_log_event(THD* thd_arg, const char* query_arg,
ulong query_length, bool using_trans,
bool suppress_use, int errcode)
:Log_event(thd_arg,
(thd_arg->thread_specific_used ? LOG_EVENT_THREAD_SPECIFIC_F :
0) |
(suppress_use ? LOG_EVENT_SUPPRESS_USE_F : 0),
using_trans),
data_buf(0), query(query_arg), catalog(thd_arg->catalog),
db(thd_arg->db), q_len((uint32) query_length),
thread_id(thd_arg->thread_id),
/* save the original thread id; we already know the server id */
slave_proxy_id(thd_arg->variables.pseudo_thread_id),
flags2_inited(1), sql_mode_inited(1), charset_inited(1),
sql_mode(thd_arg->variables.sql_mode),
auto_increment_increment(thd_arg->variables.auto_increment_increment),
auto_increment_offset(thd_arg->variables.auto_increment_offset),
lc_time_names_number(thd_arg->variables.lc_time_names->number),
charset_database_number(0),
table_map_for_update((ulonglong)thd_arg->table_map_for_update),
master_data_written(0)
{
time_t end_time;
memset(&user, 0, sizeof(user));
memset(&host, 0, sizeof(host));
error_code= errcode;
time(&end_time);
exec_time = (ulong) (end_time - thd_arg->start_time);
/**
@todo this means that if we have no catalog, then it is replicated
as an existing catalog of length zero. is that safe? /sven
*/
catalog_len = (catalog) ? (uint32) strlen(catalog) : 0;
/* status_vars_len is set just before writing the event */
db_len = (db) ? (uint32) strlen(db) : 0;
if (thd_arg->variables.collation_database != thd_arg->db_charset)
charset_database_number= thd_arg->variables.collation_database->number;
/*
We only replicate over the bits of flags2 that we need: the rest
are masked out by "& OPTIONS_WRITTEN_TO_BINLOG".
We also force AUTOCOMMIT=1. Rationale (cf. BUG#29288): After
fixing BUG#26395, we always write BEGIN and COMMIT around all
transactions (even single statements in autocommit mode). This is
so that replication from non-transactional to transactional table
and error recovery from XA to non-XA table should work as
expected. The BEGIN/COMMIT are added in log.cc. However, there is
one exception: MyISAM bypasses log.cc and writes directly to the
binlog. So if autocommit is off, master has MyISAM, and slave has
a transactional engine, then the slave will just see one long
never-ending transaction. The only way to bypass explicit
BEGIN/COMMIT in the binlog is by using a non-transactional table.
So setting AUTOCOMMIT=1 will make this work as expected.
Note: explicitly replicate AUTOCOMMIT=1 from master. We do not
assume AUTOCOMMIT=1 on slave; the slave still reads the state of
the autocommit flag as written by the master to the binlog. This
behavior may change after WL#4162 has been implemented.
*/
flags2= (uint32) (thd_arg->options &
(OPTIONS_WRITTEN_TO_BIN_LOG & ~OPTION_NOT_AUTOCOMMIT));
DBUG_ASSERT(thd_arg->variables.character_set_client->number < 256*256);
DBUG_ASSERT(thd_arg->variables.collation_connection->number < 256*256);
DBUG_ASSERT(thd_arg->variables.collation_server->number < 256*256);
DBUG_ASSERT(thd_arg->variables.character_set_client->mbminlen == 1);
int2store(charset, thd_arg->variables.character_set_client->number);
int2store(charset+2, thd_arg->variables.collation_connection->number);
int2store(charset+4, thd_arg->variables.collation_server->number);
if (thd_arg->time_zone_used)
{
/*
Note that our event becomes dependent on the Time_zone object
representing the time zone. Fortunately such objects are never deleted
or changed during mysqld's lifetime.
*/
time_zone_len= thd_arg->variables.time_zone->get_name()->length();
time_zone_str= thd_arg->variables.time_zone->get_name()->ptr();
}
else
time_zone_len= 0;
DBUG_PRINT("info",("Query_log_event has flags2: %lu sql_mode: %lu",
(ulong) flags2, sql_mode));
}
#endif /* MYSQL_CLIENT */
/* 2 utility functions for the next method */
/**
Read a string with length from memory.
This function reads the string-with-length stored at
<code>src</code> and extract the length into <code>*len</code> and
a pointer to the start of the string into <code>*dst</code>. The
string can then be copied using <code>memcpy()</code> with the
number of bytes given in <code>*len</code>.
@param src Pointer to variable holding a pointer to the memory to
read the string from.
@param dst Pointer to variable holding a pointer where the actual
string starts. Starting from this position, the string
can be copied using @c memcpy().
@param len Pointer to variable where the length will be stored.
@param end One-past-the-end of the memory where the string is
stored.
@return Zero if the entire string can be copied successfully,
@c UINT_MAX if the length could not be read from memory
(that is, if <code>*src >= end</code>), otherwise the
number of bytes that are missing to read the full
string, which happends <code>*dst + *len >= end</code>.
*/
static int
get_str_len_and_pointer(const Log_event::Byte **src,
const char **dst,
uint *len,
const Log_event::Byte *end)
{
if (*src >= end)
return -1; // Will be UINT_MAX in two-complement arithmetics
uint length= **src;
if (length > 0)
{
if (*src + length >= end)
return *src + length - end + 1; // Number of bytes missing
*dst= (char *)*src + 1; // Will be copied later
}
*len= length;
*src+= length + 1;
return 0;
}
static void copy_str_and_move(const char **src,
Log_event::Byte **dst,
uint len)
{
memcpy(*dst, *src, len);
*src= (const char *)*dst;
(*dst)+= len;
*(*dst)++= 0;
}
#ifndef DBUG_OFF
static char const *
code_name(int code)
{
static char buf[255];
switch (code) {
case Q_FLAGS2_CODE: return "Q_FLAGS2_CODE";
case Q_SQL_MODE_CODE: return "Q_SQL_MODE_CODE";
case Q_CATALOG_CODE: return "Q_CATALOG_CODE";
case Q_AUTO_INCREMENT: return "Q_AUTO_INCREMENT";
case Q_CHARSET_CODE: return "Q_CHARSET_CODE";
case Q_TIME_ZONE_CODE: return "Q_TIME_ZONE_CODE";
case Q_CATALOG_NZ_CODE: return "Q_CATALOG_NZ_CODE";
case Q_LC_TIME_NAMES_CODE: return "Q_LC_TIME_NAMES_CODE";
case Q_CHARSET_DATABASE_CODE: return "Q_CHARSET_DATABASE_CODE";
case Q_TABLE_MAP_FOR_UPDATE_CODE: return "Q_TABLE_MAP_FOR_UPDATE_CODE";
case Q_MASTER_DATA_WRITTEN_CODE: return "Q_MASTER_DATA_WRITTEN_CODE";
}
sprintf(buf, "CODE#%d", code);
return buf;
}
#endif
/**
Macro to check that there is enough space to read from memory.
@param PTR Pointer to memory
@param END End of memory
@param CNT Number of bytes that should be read.
*/
#define CHECK_SPACE(PTR,END,CNT) \
do { \
DBUG_PRINT("info", ("Read %s", code_name(pos[-1]))); \
DBUG_ASSERT((PTR) + (CNT) <= (END)); \
if ((PTR) + (CNT) > (END)) { \
DBUG_PRINT("info", ("query= 0")); \
query= 0; \
DBUG_VOID_RETURN; \
} \
} while (0)
/**
This is used by the SQL slave thread to prepare the event before execution.
*/
Query_log_event::Query_log_event(const char* buf, uint event_len,
const Format_description_log_event
*description_event,
Log_event_type event_type)
:Log_event(buf, description_event), data_buf(0), query(NullS),
db(NullS), catalog_len(0), status_vars_len(0),
flags2_inited(0), sql_mode_inited(0), charset_inited(0),
auto_increment_increment(1), auto_increment_offset(1),
time_zone_len(0), lc_time_names_number(0), charset_database_number(0),
table_map_for_update(0), master_data_written(0)
{
ulong data_len;
uint32 tmp;
uint8 common_header_len, post_header_len;
Log_event::Byte *start;
const Log_event::Byte *end;
bool catalog_nz= 1;
DBUG_ENTER("Query_log_event::Query_log_event(char*,...)");
memset(&user, 0, sizeof(user));
memset(&host, 0, sizeof(host));
common_header_len= description_event->common_header_len;
post_header_len= description_event->post_header_len[event_type-1];
DBUG_PRINT("info",("event_len: %u common_header_len: %d post_header_len: %d",
event_len, common_header_len, post_header_len));
/*
We test if the event's length is sensible, and if so we compute data_len.
We cannot rely on QUERY_HEADER_LEN here as it would not be format-tolerant.
We use QUERY_HEADER_MINIMAL_LEN which is the same for 3.23, 4.0 & 5.0.
*/
if (event_len < (uint)(common_header_len + post_header_len))
DBUG_VOID_RETURN;
data_len = event_len - (common_header_len + post_header_len);
buf+= common_header_len;
slave_proxy_id= thread_id = uint4korr(buf + Q_THREAD_ID_OFFSET);
exec_time = uint4korr(buf + Q_EXEC_TIME_OFFSET);
db_len = (uint)buf[Q_DB_LEN_OFFSET]; // TODO: add a check of all *_len vars
error_code = uint2korr(buf + Q_ERR_CODE_OFFSET);
/*
5.0 format starts here.
Depending on the format, we may or not have affected/warnings etc
The remnent post-header to be parsed has length:
*/
tmp= post_header_len - QUERY_HEADER_MINIMAL_LEN;
if (tmp)
{
status_vars_len= uint2korr(buf + Q_STATUS_VARS_LEN_OFFSET);
/*
Check if status variable length is corrupt and will lead to very
wrong data. We could be even more strict and require data_len to
be even bigger, but this will suffice to catch most corruption
errors that can lead to a crash.
*/
if (status_vars_len > min(data_len, MAX_SIZE_LOG_EVENT_STATUS))
{
DBUG_PRINT("info", ("status_vars_len (%u) > data_len (%lu); query= 0",
status_vars_len, data_len));
query= 0;
DBUG_VOID_RETURN;
}
data_len-= status_vars_len;
DBUG_PRINT("info", ("Query_log_event has status_vars_len: %u",
(uint) status_vars_len));
tmp-= 2;
}
else
{
/*
server version < 5.0 / binlog_version < 4 master's event is
relay-logged with storing the original size of the event in
Q_MASTER_DATA_WRITTEN_CODE status variable.
The size is to be restored at reading Q_MASTER_DATA_WRITTEN_CODE-marked
event from the relay log.
*/
DBUG_ASSERT(description_event->binlog_version < 4);
master_data_written= data_written;
}
/*
We have parsed everything we know in the post header for QUERY_EVENT,
the rest of post header is either comes from older version MySQL or
dedicated to derived events (e.g. Execute_load_query...)
*/
/* variable-part: the status vars; only in MySQL 5.0 */
start= (Log_event::Byte*) (buf+post_header_len);
end= (const Log_event::Byte*) (start+status_vars_len);
for (const Log_event::Byte* pos= start; pos < end;)
{
switch (*pos++) {
case Q_FLAGS2_CODE:
CHECK_SPACE(pos, end, 4);
flags2_inited= 1;
flags2= uint4korr(pos);
DBUG_PRINT("info",("In Query_log_event, read flags2: %lu", (ulong) flags2));
pos+= 4;
break;
case Q_SQL_MODE_CODE:
{
#ifndef DBUG_OFF
char buff[22];
#endif
CHECK_SPACE(pos, end, 8);
sql_mode_inited= 1;
sql_mode= (ulong) uint8korr(pos); // QQ: Fix when sql_mode is ulonglong
DBUG_PRINT("info",("In Query_log_event, read sql_mode: %s",
llstr(sql_mode, buff)));
pos+= 8;
break;
}
case Q_CATALOG_NZ_CODE:
DBUG_PRINT("info", ("case Q_CATALOG_NZ_CODE; pos: 0x%lx; end: 0x%lx",
(ulong) pos, (ulong) end));
if (get_str_len_and_pointer(&pos, &catalog, &catalog_len, end))
{
DBUG_PRINT("info", ("query= 0"));
query= 0;
DBUG_VOID_RETURN;
}
break;
case Q_AUTO_INCREMENT:
CHECK_SPACE(pos, end, 4);
auto_increment_increment= uint2korr(pos);
auto_increment_offset= uint2korr(pos+2);
pos+= 4;
break;
case Q_CHARSET_CODE:
{
CHECK_SPACE(pos, end, 6);
charset_inited= 1;
memcpy(charset, pos, 6);
pos+= 6;
break;
}
case Q_TIME_ZONE_CODE:
{
if (get_str_len_and_pointer(&pos, &time_zone_str, &time_zone_len, end))
{
DBUG_PRINT("info", ("Q_TIME_ZONE_CODE: query= 0"));
query= 0;
DBUG_VOID_RETURN;
}
break;
}
case Q_CATALOG_CODE: /* for 5.0.x where 0<=x<=3 masters */
CHECK_SPACE(pos, end, 1);
if ((catalog_len= *pos))
catalog= (char*) pos+1; // Will be copied later
CHECK_SPACE(pos, end, catalog_len + 2);
pos+= catalog_len+2; // leap over end 0
catalog_nz= 0; // catalog has end 0 in event
break;
case Q_LC_TIME_NAMES_CODE:
CHECK_SPACE(pos, end, 2);
lc_time_names_number= uint2korr(pos);
pos+= 2;
break;
case Q_CHARSET_DATABASE_CODE:
CHECK_SPACE(pos, end, 2);
charset_database_number= uint2korr(pos);
pos+= 2;
break;
case Q_TABLE_MAP_FOR_UPDATE_CODE:
CHECK_SPACE(pos, end, 8);
table_map_for_update= uint8korr(pos);
pos+= 8;
break;
case Q_MASTER_DATA_WRITTEN_CODE:
CHECK_SPACE(pos, end, 4);
data_written= master_data_written= uint4korr(pos);
pos+= 4;
break;
case Q_INVOKER:
{
CHECK_SPACE(pos, end, 1);
user.length= *pos++;
CHECK_SPACE(pos, end, user.length);
user.str= (char *)pos;
pos+= user.length;
CHECK_SPACE(pos, end, 1);
host.length= *pos++;
CHECK_SPACE(pos, end, host.length);
host.str= (char *)pos;
pos+= host.length;
}
default:
/* That's why you must write status vars in growing order of code */
DBUG_PRINT("info",("Query_log_event has unknown status vars (first has\
code: %u), skipping the rest of them", (uint) *(pos-1)));
pos= (const uchar*) end; // Break loop
}
}
#if !defined(MYSQL_CLIENT) && defined(HAVE_QUERY_CACHE)
if (!(start= data_buf = (Log_event::Byte*) my_malloc(catalog_len + 1 +
time_zone_len + 1 +
data_len + 1 +
QUERY_CACHE_FLAGS_SIZE +
user.length + 1 +
host.length + 1 +
db_len + 1,
MYF(MY_WME))))
#else
if (!(start= data_buf = (Log_event::Byte*) my_malloc(catalog_len + 1 +
time_zone_len + 1 +
data_len + 1 +
user.length + 1 +
host.length + 1,
MYF(MY_WME))))
#endif
DBUG_VOID_RETURN;
if (catalog_len) // If catalog is given
{
/**
@todo we should clean up and do only copy_str_and_move; it
works for both cases. Then we can remove the catalog_nz
flag. /sven
*/
if (likely(catalog_nz)) // true except if event comes from 5.0.0|1|2|3.
copy_str_and_move(&catalog, &start, catalog_len);
else
{
memcpy(start, catalog, catalog_len+1); // copy end 0
catalog= (const char *)start;
start+= catalog_len+1;
}
}
if (time_zone_len)
copy_str_and_move(&time_zone_str, &start, time_zone_len);
if (user.length > 0)
copy_str_and_move((const char **)&(user.str), &start, user.length);
if (host.length > 0)
copy_str_and_move((const char **)&(host.str), &start, host.length);
/**
if time_zone_len or catalog_len are 0, then time_zone and catalog
are uninitialized at this point. shouldn't they point to the
zero-length null-terminated strings we allocated space for in the
my_alloc call above? /sven
*/
/* A 2nd variable part; this is common to all versions */
memcpy((char*) start, end, data_len); // Copy db and query
start[data_len]= '\0'; // End query with \0 (For safetly)
db= (char *)start;
query= (char *)(start + db_len + 1);
q_len= data_len - db_len -1;
DBUG_VOID_RETURN;
}
#ifdef MYSQL_CLIENT
/**
Query_log_event::print().
@todo
print the catalog ??
*/
void Query_log_event::print_query_header(IO_CACHE* file,
PRINT_EVENT_INFO* print_event_info)
{
// TODO: print the catalog ??
char buff[40],*end; // Enough for SET TIMESTAMP
bool different_db= 1;
uint32 tmp;
if (!print_event_info->short_form)
{
print_header(file, print_event_info, FALSE);
my_b_printf(file, "\t%s\tthread_id=%lu\texec_time=%lu\terror_code=%d\n",
get_type_str(), (ulong) thread_id, (ulong) exec_time,
error_code);
}
if ((flags & LOG_EVENT_SUPPRESS_USE_F))
{
if (!is_trans_keyword())
print_event_info->db[0]= '\0';
}
else if (db)
{
different_db= memcmp(print_event_info->db, db, db_len + 1);
if (different_db)
memcpy(print_event_info->db, db, db_len + 1);
if (db[0] && different_db)
my_b_printf(file, "use %s%s\n", db, print_event_info->delimiter);
}
end=int10_to_str((long) when, strmov(buff,"SET TIMESTAMP="),10);
end= strmov(end, print_event_info->delimiter);
*end++='\n';
my_b_write(file, (uchar*) buff, (uint) (end-buff));
if ((!print_event_info->thread_id_printed ||
((flags & LOG_EVENT_THREAD_SPECIFIC_F) &&
thread_id != print_event_info->thread_id)))
{
// If --short-form, print deterministic value instead of pseudo_thread_id.
my_b_printf(file,"SET @@session.pseudo_thread_id=%lu%s\n",
short_form ? 999999999 : (ulong)thread_id,
print_event_info->delimiter);
print_event_info->thread_id= thread_id;
print_event_info->thread_id_printed= 1;
}
/*
If flags2_inited==0, this is an event from 3.23 or 4.0; nothing to
print (remember we don't produce mixed relay logs so there cannot be
5.0 events before that one so there is nothing to reset).
*/
if (likely(flags2_inited)) /* likely as this will mainly read 5.0 logs */
{
/* tmp is a bitmask of bits which have changed. */
if (likely(print_event_info->flags2_inited))
/* All bits which have changed */
tmp= (print_event_info->flags2) ^ flags2;
else /* that's the first Query event we read */
{
print_event_info->flags2_inited= 1;
tmp= ~((uint32)0); /* all bits have changed */
}
if (unlikely(tmp)) /* some bits have changed */
{
bool need_comma= 0;
my_b_printf(file, "SET ");
print_set_option(file, tmp, OPTION_NO_FOREIGN_KEY_CHECKS, ~flags2,
"@@session.foreign_key_checks", &need_comma);
print_set_option(file, tmp, OPTION_AUTO_IS_NULL, flags2,
"@@session.sql_auto_is_null", &need_comma);
print_set_option(file, tmp, OPTION_RELAXED_UNIQUE_CHECKS, ~flags2,
"@@session.unique_checks", &need_comma);
print_set_option(file, tmp, OPTION_NOT_AUTOCOMMIT, ~flags2,
"@@session.autocommit", &need_comma);
my_b_printf(file,"%s\n", print_event_info->delimiter);
print_event_info->flags2= flags2;
}
}
/*
Now the session variables;
it's more efficient to pass SQL_MODE as a number instead of a
comma-separated list.
FOREIGN_KEY_CHECKS, SQL_AUTO_IS_NULL, UNIQUE_CHECKS are session-only
variables (they have no global version; they're not listed in
sql_class.h), The tests below work for pure binlogs or pure relay
logs. Won't work for mixed relay logs but we don't create mixed
relay logs (that is, there is no relay log with a format change
except within the 3 first events, which mysqlbinlog handles
gracefully). So this code should always be good.
*/
if (likely(sql_mode_inited) &&
(unlikely(print_event_info->sql_mode != sql_mode ||
!print_event_info->sql_mode_inited)))
{
my_b_printf(file,"SET @@session.sql_mode=%lu%s\n",
(ulong)sql_mode, print_event_info->delimiter);
print_event_info->sql_mode= sql_mode;
print_event_info->sql_mode_inited= 1;
}
if (print_event_info->auto_increment_increment != auto_increment_increment ||
print_event_info->auto_increment_offset != auto_increment_offset)
{
my_b_printf(file,"SET @@session.auto_increment_increment=%lu, @@session.auto_increment_offset=%lu%s\n",
auto_increment_increment,auto_increment_offset,
print_event_info->delimiter);
print_event_info->auto_increment_increment= auto_increment_increment;
print_event_info->auto_increment_offset= auto_increment_offset;
}
/* TODO: print the catalog when we feature SET CATALOG */
if (likely(charset_inited) &&
(unlikely(!print_event_info->charset_inited ||
memcmp(print_event_info->charset, charset, 6))))
{
CHARSET_INFO *cs_info= get_charset(uint2korr(charset), MYF(MY_WME));
if (cs_info)
{
/* for mysql client */
my_b_printf(file, "/*!\\C %s */%s\n",
cs_info->csname, print_event_info->delimiter);
}
my_b_printf(file,"SET "
"@@session.character_set_client=%d,"
"@@session.collation_connection=%d,"
"@@session.collation_server=%d"
"%s\n",
uint2korr(charset),
uint2korr(charset+2),
uint2korr(charset+4),
print_event_info->delimiter);
memcpy(print_event_info->charset, charset, 6);
print_event_info->charset_inited= 1;
}
if (time_zone_len)
{
if (memcmp(print_event_info->time_zone_str,
time_zone_str, time_zone_len+1))
{
my_b_printf(file,"SET @@session.time_zone='%s'%s\n",
time_zone_str, print_event_info->delimiter);
memcpy(print_event_info->time_zone_str, time_zone_str, time_zone_len+1);
}
}
if (lc_time_names_number != print_event_info->lc_time_names_number)
{
my_b_printf(file, "SET @@session.lc_time_names=%d%s\n",
lc_time_names_number, print_event_info->delimiter);
print_event_info->lc_time_names_number= lc_time_names_number;
}
if (charset_database_number != print_event_info->charset_database_number)
{
if (charset_database_number)
my_b_printf(file, "SET @@session.collation_database=%d%s\n",
charset_database_number, print_event_info->delimiter);
else
my_b_printf(file, "SET @@session.collation_database=DEFAULT%s\n",
print_event_info->delimiter);
print_event_info->charset_database_number= charset_database_number;
}
}
void Query_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
{
Write_on_release_cache cache(&print_event_info->head_cache, file);
print_query_header(&cache, print_event_info);
my_b_write(&cache, (uchar*) query, q_len);
my_b_printf(&cache, "\n%s\n", print_event_info->delimiter);
}
#endif /* MYSQL_CLIENT */
/*
Query_log_event::do_apply_event()
*/
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int Query_log_event::do_apply_event(Relay_log_info const *rli)
{
return do_apply_event(rli, query, q_len);
}
/**
@todo
Compare the values of "affected rows" around here. Something
like:
@code
if ((uint32) affected_in_event != (uint32) affected_on_slave)
{
sql_print_error("Slave: did not get the expected number of affected \
rows running query from master - expected %d, got %d (this numbers \
should have matched modulo 4294967296).", 0, ...);
thd->query_error = 1;
}
@endcode
We may also want an option to tell the slave to ignore "affected"
mismatch. This mismatch could be implemented with a new ER_ code, and
to ignore it you would use --slave-skip-errors...
*/
int Query_log_event::do_apply_event(Relay_log_info const *rli,
const char *query_arg, uint32 q_len_arg)
{
LEX_STRING new_db;
int expected_error,actual_error= 0;
HA_CREATE_INFO db_options;
/*
Colleagues: please never free(thd->catalog) in MySQL. This would
lead to bugs as here thd->catalog is a part of an alloced block,
not an entire alloced block (see
Query_log_event::do_apply_event()). Same for thd->db. Thank
you.
*/
thd->catalog= catalog_len ? (char *) catalog : (char *)"";
new_db.length= db_len;
new_db.str= (char *) rpl_filter->get_rewrite_db(db, &new_db.length);
thd->set_db(new_db.str, new_db.length); /* allocates a copy of 'db' */
/*
Setting the character set and collation of the current database thd->db.
*/
load_db_opt_by_name(thd, thd->db, &db_options);
if (db_options.default_table_charset)
thd->db_charset= db_options.default_table_charset;
thd->variables.auto_increment_increment= auto_increment_increment;
thd->variables.auto_increment_offset= auto_increment_offset;
/*
InnoDB internally stores the master log position it has executed so far,
i.e. the position just after the COMMIT event.
When InnoDB will want to store, the positions in rli won't have
been updated yet, so group_master_log_* will point to old BEGIN
and event_master_log* will point to the beginning of current COMMIT.
But log_pos of the COMMIT Query event is what we want, i.e. the pos of the
END of the current log event (COMMIT). We save it in rli so that InnoDB can
access it.
*/
const_cast<Relay_log_info*>(rli)->future_group_master_log_pos= log_pos;
DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));
clear_all_errors(thd, const_cast<Relay_log_info*>(rli));
if (strcmp("COMMIT", query) == 0 && rli->tables_to_lock)
{
/*
Cleaning-up the last statement context:
the terminal event of the current statement flagged with
STMT_END_F got filtered out in ndb circular replication.
*/
int error;
char llbuff[22];
if ((error= rows_event_stmt_cleanup(const_cast<Relay_log_info*>(rli), thd)))
{
const_cast<Relay_log_info*>(rli)->report(ERROR_LEVEL, error,
"Error in cleaning up after an event preceeding the commit; "
"the group log file/position: %s %s",
const_cast<Relay_log_info*>(rli)->group_master_log_name,
llstr(const_cast<Relay_log_info*>(rli)->group_master_log_pos,
llbuff));
}
/*
Executing a part of rli->stmt_done() logics that does not deal
with group position change. The part is redundant now but is
future-change-proof addon, e.g if COMMIT handling will start checking
invariants like IN_STMT flag must be off at committing the transaction.
*/
const_cast<Relay_log_info*>(rli)->inc_event_relay_log_pos();
const_cast<Relay_log_info*>(rli)->clear_flag(Relay_log_info::IN_STMT);
}
else
{
const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
}
/*
Note: We do not need to execute reset_one_shot_variables() if this
db_ok() test fails.
Reason: The db stored in binlog events is the same for SET and for
its companion query. If the SET is ignored because of
db_ok(), the companion query will also be ignored, and if
the companion query is ignored in the db_ok() test of
::do_apply_event(), then the companion SET also have so
we don't need to reset_one_shot_variables().
*/
if (is_trans_keyword() || rpl_filter->db_ok(thd->db))
{
thd->set_time((time_t)when);
thd->set_query((char*)query_arg, q_len_arg);
VOID(pthread_mutex_lock(&LOCK_thread_count));
thd->query_id = next_query_id();
VOID(pthread_mutex_unlock(&LOCK_thread_count));
thd->variables.pseudo_thread_id= thread_id; // for temp tables
DBUG_PRINT("query",("%s", thd->query()));
if (ignored_error_code((expected_error= error_code)) ||
!unexpected_error_code(expected_error))
{
if (flags2_inited)
/*
all bits of thd->options which are 1 in OPTIONS_WRITTEN_TO_BIN_LOG
must take their value from flags2.
*/
thd->options= flags2|(thd->options & ~OPTIONS_WRITTEN_TO_BIN_LOG);
/*
else, we are in a 3.23/4.0 binlog; we previously received a
Rotate_log_event which reset thd->options and sql_mode etc, so
nothing to do.
*/
/*
We do not replicate IGNORE_DIR_IN_CREATE. That is, if the master is a
slave which runs with SQL_MODE=IGNORE_DIR_IN_CREATE, this should not
force us to ignore the dir too. Imagine you are a ring of machines, and
one has a disk problem so that you temporarily need
IGNORE_DIR_IN_CREATE on this machine; you don't want it to propagate
elsewhere (you don't want all slaves to start ignoring the dirs).
*/
if (sql_mode_inited)
thd->variables.sql_mode=
(ulong) ((thd->variables.sql_mode & MODE_NO_DIR_IN_CREATE) |
(sql_mode & ~(ulong) MODE_NO_DIR_IN_CREATE));
if (charset_inited)
{
if (rli->cached_charset_compare(charset))
{
/* Verify that we support the charsets found in the event. */
if (!(thd->variables.character_set_client=
get_charset(uint2korr(charset), MYF(MY_WME))) ||
!(thd->variables.collation_connection=
get_charset(uint2korr(charset+2), MYF(MY_WME))) ||
!(thd->variables.collation_server=
get_charset(uint2korr(charset+4), MYF(MY_WME))))
{
/*
We updated the thd->variables with nonsensical values (0). Let's
set them to something safe (i.e. which avoids crash), and we'll
stop with EE_UNKNOWN_CHARSET in compare_errors (unless set to
ignore this error).
*/
set_slave_thread_default_charset(thd, rli);
goto compare_errors;
}
thd->update_charset(); // for the charset change to take effect
}
}
if (time_zone_len)
{
String tmp(time_zone_str, time_zone_len, &my_charset_bin);
if (!(thd->variables.time_zone= my_tz_find(thd, &tmp)))
{
my_error(ER_UNKNOWN_TIME_ZONE, MYF(0), tmp.c_ptr());
thd->variables.time_zone= global_system_variables.time_zone;
goto compare_errors;
}
}
if (lc_time_names_number)
{
if (!(thd->variables.lc_time_names=
my_locale_by_number(lc_time_names_number)))
{
my_printf_error(ER_UNKNOWN_ERROR,
"Unknown locale: '%d'", MYF(0), lc_time_names_number);
thd->variables.lc_time_names= &my_locale_en_US;
goto compare_errors;
}
}
else
thd->variables.lc_time_names= &my_locale_en_US;
if (charset_database_number)
{
CHARSET_INFO *cs;
if (!(cs= get_charset(charset_database_number, MYF(0))))
{
char buf[20];
int10_to_str((int) charset_database_number, buf, -10);
my_error(ER_UNKNOWN_COLLATION, MYF(0), buf);
goto compare_errors;
}
thd->variables.collation_database= cs;
}
else
thd->variables.collation_database= thd->db_charset;
thd->table_map_for_update= (table_map)table_map_for_update;
thd->set_invoker(&user, &host);
/* Execute the query (note that we bypass dispatch_command()) */
const char* found_semicolon= NULL;
mysql_parse(thd, thd->query(), thd->query_length(), &found_semicolon);
log_slow_statement(thd);
/*
Resetting the enable_slow_log thd variable.
We need to reset it back to the opt_log_slow_slave_statements
value after the statement execution (and slow logging
is done). It might have changed if the statement was an
admin statement (in which case, down in mysql_parse execution
thd->enable_slow_log is set to the value of
opt_log_slow_admin_statements).
*/
thd->enable_slow_log= opt_log_slow_slave_statements;
}
else
{
/*
The query got a really bad error on the master (thread killed etc),
which could be inconsistent. Parse it to test the table names: if the
replicate-*-do|ignore-table rules say "this query must be ignored" then
we exit gracefully; otherwise we warn about the bad error and tell DBA
to check/fix it.
*/
if (mysql_test_parse_for_slave(thd, thd->query(), thd->query_length()))
clear_all_errors(thd, const_cast<Relay_log_info*>(rli)); /* Can ignore query */
else
{
rli->report(ERROR_LEVEL, expected_error,
"\
Query partially completed on the master (error on master: %d) \
and was aborted. There is a chance that your master is inconsistent at this \
point. If you are sure that your master is ok, run this query manually on the \
slave and then restart the slave with SET GLOBAL SQL_SLAVE_SKIP_COUNTER=1; \
START SLAVE; . Query: '%s'", expected_error, thd->query());
thd->is_slave_error= 1;
}
goto end;
}
/* If the query was not ignored, it is printed to the general log */
if (!thd->is_error() || thd->main_da.sql_errno() != ER_SLAVE_IGNORED_TABLE)
general_log_write(thd, COM_QUERY, thd->query(), thd->query_length());
compare_errors:
/*
In the slave thread, we may sometimes execute some DROP / * 40005
TEMPORARY * / TABLE that come from parts of binlogs (likely if we
use RESET SLAVE or CHANGE MASTER TO), while the temporary table
has already been dropped. To ignore such irrelevant "table does
not exist errors", we silently clear the error if TEMPORARY was used.
*/
if (thd->lex->sql_command == SQLCOM_DROP_TABLE && thd->lex->drop_temporary &&
thd->is_error() && thd->main_da.sql_errno() == ER_BAD_TABLE_ERROR &&
!expected_error)
thd->main_da.reset_diagnostics_area();
/*
If we expected a non-zero error code, and we don't get the same error
code, and it should be ignored or is related to a concurrency issue.
*/
actual_error= thd->is_error() ? thd->main_da.sql_errno() : 0;
DBUG_PRINT("info",("expected_error: %d sql_errno: %d",
expected_error, actual_error));
if ((expected_error && expected_error != actual_error &&
!concurrency_error_code(expected_error)) &&
!ignored_error_code(actual_error) &&
!ignored_error_code(expected_error))
{
rli->report(ERROR_LEVEL, 0,
"\
Query caused different errors on master and slave. \
Error on master: message (format)='%s' error code=%d ; \
Error on slave: actual message='%s', error code=%d. \
Default database: '%s'. Query: '%s'",
ER_SAFE(expected_error),
expected_error,
actual_error ? thd->main_da.message() : "no error",
actual_error,
print_slave_db_safe(db), query_arg);
thd->is_slave_error= 1;
}
/*
If we get the same error code as expected and it is not a concurrency
issue, or should be ignored.
*/
else if ((expected_error == actual_error &&
!concurrency_error_code(expected_error)) ||
ignored_error_code(actual_error))
{
DBUG_PRINT("info",("error ignored"));
clear_all_errors(thd, const_cast<Relay_log_info*>(rli));
thd->killed= THD::NOT_KILLED;
/*
When an error is expected and matches the actual error the
slave does not report any error and by consequence changes
on transactional tables are not rolled back in the function
close_thread_tables(). For that reason, we explicitly roll
them back here.
*/
if (expected_error && expected_error == actual_error)
ha_autocommit_or_rollback(thd, TRUE);
}
/*
If we expected a non-zero error code and get nothing and, it is a concurrency
issue or should be ignored.
*/
else if (expected_error && !actual_error &&
(concurrency_error_code(expected_error) ||
ignored_error_code(expected_error)))
ha_autocommit_or_rollback(thd, TRUE);
/*
Other cases: mostly we expected no error and get one.
*/
else if (thd->is_slave_error || thd->is_fatal_error)
{
rli->report(ERROR_LEVEL, actual_error,
"Error '%s' on query. Default database: '%s'. Query: '%s'",
(actual_error ? thd->main_da.message() :
"unexpected success or fatal error"),
print_slave_db_safe(thd->db), query_arg);
thd->is_slave_error= 1;
}
/*
TODO: compare the values of "affected rows" around here. Something
like:
if ((uint32) affected_in_event != (uint32) affected_on_slave)
{
sql_print_error("Slave: did not get the expected number of affected \
rows running query from master - expected %d, got %d (this numbers \
should have matched modulo 4294967296).", 0, ...);
thd->is_slave_error = 1;
}
We may also want an option to tell the slave to ignore "affected"
mismatch. This mismatch could be implemented with a new ER_ code, and
to ignore it you would use --slave-skip-errors...
To do the comparison we need to know the value of "affected" which the
above mysql_parse() computed. And we need to know the value of
"affected" in the master's binlog. Both will be implemented later. The
important thing is that we now have the format ready to log the values
of "affected" in the binlog. So we can release 5.0.0 before effectively
logging "affected" and effectively comparing it.
*/
} /* End of if (db_ok(... */
end:
/*
Probably we have set thd->query, thd->db, thd->catalog to point to places
in the data_buf of this event. Now the event is going to be deleted
probably, so data_buf will be freed, so the thd->... listed above will be
pointers to freed memory.
So we must set them to 0, so that those bad pointers values are not later
used. Note that "cleanup" queries like automatic DROP TEMPORARY TABLE
don't suffer from these assignments to 0 as DROP TEMPORARY
TABLE uses the db.table syntax.
*/
thd->catalog= 0;
thd->set_db(NULL, 0); /* will free the current database */
thd->set_query(NULL, 0);
DBUG_PRINT("info", ("end: query= 0"));
close_thread_tables(thd);
/*
As a disk space optimization, future masters will not log an event for
LAST_INSERT_ID() if that function returned 0 (and thus they will be able
to replace the THD::stmt_depends_on_first_successful_insert_id_in_prev_stmt
variable by (THD->first_successful_insert_id_in_prev_stmt > 0) ; with the
resetting below we are ready to support that.
*/
thd->first_successful_insert_id_in_prev_stmt_for_binlog= 0;
thd->first_successful_insert_id_in_prev_stmt= 0;
thd->stmt_depends_on_first_successful_insert_id_in_prev_stmt= 0;
free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
return thd->is_slave_error;
}
int Query_log_event::do_update_pos(Relay_log_info *rli)
{
/*
Note that we will not increment group* positions if we are just
after a SET ONE_SHOT, because SET ONE_SHOT should not be separated
from its following updating query.
*/
if (thd->one_shot_set)
{
rli->inc_event_relay_log_pos();
return 0;
}
else
return Log_event::do_update_pos(rli);
}
Log_event::enum_skip_reason
Query_log_event::do_shall_skip(Relay_log_info *rli)
{
DBUG_ENTER("Query_log_event::do_shall_skip");
DBUG_PRINT("debug", ("query: %s; q_len: %d", query, q_len));
DBUG_ASSERT(query && q_len > 0);
if (rli->slave_skip_counter > 0)
{
if (strcmp("BEGIN", query) == 0)
{
thd->options|= OPTION_BEGIN;
DBUG_RETURN(Log_event::continue_group(rli));
}
if (strcmp("COMMIT", query) == 0 || strcmp("ROLLBACK", query) == 0)
{
thd->options&= ~OPTION_BEGIN;
DBUG_RETURN(Log_event::EVENT_SKIP_COUNT);
}
}
DBUG_RETURN(Log_event::do_shall_skip(rli));
}
#endif
/**************************************************************************
Start_log_event_v3 methods
**************************************************************************/
#ifndef MYSQL_CLIENT
Start_log_event_v3::Start_log_event_v3()
:Log_event(), created(0), binlog_version(BINLOG_VERSION),
dont_set_created(0)
{
memcpy(server_version, ::server_version, ST_SERVER_VER_LEN);
}
#endif
/*
Start_log_event_v3::pack_info()
*/
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Start_log_event_v3::pack_info(Protocol *protocol)
{
char buf[12 + ST_SERVER_VER_LEN + 14 + 22], *pos;
pos= strmov(buf, "Server ver: ");
pos= strmov(pos, server_version);
pos= strmov(pos, ", Binlog ver: ");
pos= int10_to_str(binlog_version, pos, 10);
protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
}
#endif
/*
Start_log_event_v3::print()
*/
#ifdef MYSQL_CLIENT
void Start_log_event_v3::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
{
DBUG_ENTER("Start_log_event_v3::print");
Write_on_release_cache cache(&print_event_info->head_cache, file,
Write_on_release_cache::FLUSH_F);
if (!print_event_info->short_form)
{
print_header(&cache, print_event_info, FALSE);
my_b_printf(&cache, "\tStart: binlog v %d, server v %s created ",
binlog_version, server_version);
print_timestamp(&cache);
if (created)
my_b_printf(&cache," at startup");
my_b_printf(&cache, "\n");
if (flags & LOG_EVENT_BINLOG_IN_USE_F)
my_b_printf(&cache, "# Warning: this binlog is either in use or was not "
"closed properly.\n");
}
if (!is_artificial_event() && created)
{
#ifdef WHEN_WE_HAVE_THE_RESET_CONNECTION_SQL_COMMAND
/*
This is for mysqlbinlog: like in replication, we want to delete the stale
tmp files left by an unclean shutdown of mysqld (temporary tables)
and rollback unfinished transaction.
Probably this can be done with RESET CONNECTION (syntax to be defined).
*/
my_b_printf(&cache,"RESET CONNECTION%s\n", print_event_info->delimiter);
#else
my_b_printf(&cache,"ROLLBACK%s\n", print_event_info->delimiter);
#endif
}
if (temp_buf &&
print_event_info->base64_output_mode != BASE64_OUTPUT_NEVER &&
!print_event_info->short_form)
{
if (print_event_info->base64_output_mode != BASE64_OUTPUT_DECODE_ROWS)
my_b_printf(&cache, "BINLOG '\n");
print_base64(&cache, print_event_info, FALSE);
print_event_info->printed_fd_event= TRUE;
}
DBUG_VOID_RETURN;
}
#endif /* MYSQL_CLIENT */
/*
Start_log_event_v3::Start_log_event_v3()
*/
Start_log_event_v3::Start_log_event_v3(const char* buf,
const Format_description_log_event
*description_event)
:Log_event(buf, description_event)
{
buf+= description_event->common_header_len;
binlog_version= uint2korr(buf+ST_BINLOG_VER_OFFSET);
memcpy(server_version, buf+ST_SERVER_VER_OFFSET,
ST_SERVER_VER_LEN);
// prevent overrun if log is corrupted on disk
server_version[ST_SERVER_VER_LEN-1]= 0;
created= uint4korr(buf+ST_CREATED_OFFSET);
dont_set_created= 1;
}
/*
Start_log_event_v3::write()
*/
#ifndef MYSQL_CLIENT
bool Start_log_event_v3::write(IO_CACHE* file)
{
char buff[START_V3_HEADER_LEN];
int2store(buff + ST_BINLOG_VER_OFFSET,binlog_version);
memcpy(buff + ST_SERVER_VER_OFFSET,server_version,ST_SERVER_VER_LEN);
if (!dont_set_created)
created= when= get_time();
int4store(buff + ST_CREATED_OFFSET,created);
return (write_header(file, sizeof(buff)) ||
my_b_safe_write(file, (uchar*) buff, sizeof(buff)));
}
#endif
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
/**
Start_log_event_v3::do_apply_event() .
The master started
IMPLEMENTATION
- To handle the case where the master died without having time to write
DROP TEMPORARY TABLE, DO RELEASE_LOCK (prepared statements' deletion is
TODO), we clean up all temporary tables that we got, if we are sure we
can (see below).
@todo
- Remove all active user locks.
Guilhem 2003-06: this is true but not urgent: the worst it can cause is
the use of a bit of memory for a user lock which will not be used
anymore. If the user lock is later used, the old one will be released. In
other words, no deadlock problem.
*/
int Start_log_event_v3::do_apply_event(Relay_log_info const *rli)
{
DBUG_ENTER("Start_log_event_v3::do_apply_event");
switch (binlog_version)
{
case 3:
case 4:
/*
This can either be 4.x (then a Start_log_event_v3 is only at master
startup so we are sure the master has restarted and cleared his temp
tables; the event always has 'created'>0) or 5.0 (then we have to test
'created').
*/
if (created)
{
close_temporary_tables(thd);
cleanup_load_tmpdir();
}
else
{
/*
Set all temporary tables thread references to the current thread
as they may point to the "old" SQL slave thread in case of its
restart.
*/
TABLE *table;
for (table= thd->temporary_tables; table; table= table->next)
table->in_use= thd;
}
break;
/*
Now the older formats; in that case load_tmpdir is cleaned up by the I/O
thread.
*/
case 1:
if (strncmp(rli->relay_log.description_event_for_exec->server_version,
"3.23.57",7) >= 0 && created)
{
/*
Can distinguish, based on the value of 'created': this event was
generated at master startup.
*/
close_temporary_tables(thd);
}
/*
Otherwise, can't distinguish a Start_log_event generated at
master startup and one generated by master FLUSH LOGS, so cannot
be sure temp tables have to be dropped. So do nothing.
*/
break;
default:
/* this case is impossible */
DBUG_RETURN(1);
}
DBUG_RETURN(0);
}
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
/***************************************************************************
Format_description_log_event methods
****************************************************************************/
/**
Format_description_log_event 1st ctor.
Ctor. Can be used to create the event to write to the binary log (when the
server starts or when FLUSH LOGS), or to create artificial events to parse
binlogs from MySQL 3.23 or 4.x.
When in a client, only the 2nd use is possible.
@param binlog_version the binlog version for which we want to build
an event. Can be 1 (=MySQL 3.23), 3 (=4.0.x
x>=2 and 4.1) or 4 (MySQL 5.0). Note that the
old 4.0 (binlog version 2) is not supported;
it should not be used for replication with
5.0.
*/
Format_description_log_event::
Format_description_log_event(uint8 binlog_ver, const char* server_ver)
:Start_log_event_v3(), event_type_permutation(0)
{
binlog_version= binlog_ver;
switch (binlog_ver) {
case 4: /* MySQL 5.0 */
memcpy(server_version, ::server_version, ST_SERVER_VER_LEN);
DBUG_EXECUTE_IF("pretend_version_50034_in_binlog",
strmov(server_version, "5.0.34"););
common_header_len= LOG_EVENT_HEADER_LEN;
number_of_event_types= LOG_EVENT_TYPES;
/* we'll catch my_malloc() error in is_valid() */
post_header_len=(uint8*) my_malloc(number_of_event_types*sizeof(uint8),
MYF(0));
/*
This long list of assignments is not beautiful, but I see no way to
make it nicer, as the right members are #defines, not array members, so
it's impossible to write a loop.
*/
if (post_header_len)
{
// Allows us to sanity-check that all events initialized their
// events (see the end of this 'if' block).
IF_DBUG(memset(post_header_len, 255,
number_of_event_types*sizeof(uint8)););
/* Note: all event types must explicitly fill in their lengths here. */
post_header_len[START_EVENT_V3-1]= START_V3_HEADER_LEN;
post_header_len[QUERY_EVENT-1]= QUERY_HEADER_LEN;
post_header_len[STOP_EVENT-1]= STOP_HEADER_LEN;
post_header_len[ROTATE_EVENT-1]= ROTATE_HEADER_LEN;
post_header_len[INTVAR_EVENT-1]= INTVAR_HEADER_LEN;
post_header_len[LOAD_EVENT-1]= LOAD_HEADER_LEN;
post_header_len[SLAVE_EVENT-1]= SLAVE_HEADER_LEN;
post_header_len[CREATE_FILE_EVENT-1]= CREATE_FILE_HEADER_LEN;
post_header_len[APPEND_BLOCK_EVENT-1]= APPEND_BLOCK_HEADER_LEN;
post_header_len[EXEC_LOAD_EVENT-1]= EXEC_LOAD_HEADER_LEN;
post_header_len[DELETE_FILE_EVENT-1]= DELETE_FILE_HEADER_LEN;
post_header_len[NEW_LOAD_EVENT-1]= NEW_LOAD_HEADER_LEN;
post_header_len[RAND_EVENT-1]= RAND_HEADER_LEN;
post_header_len[USER_VAR_EVENT-1]= USER_VAR_HEADER_LEN;
post_header_len[FORMAT_DESCRIPTION_EVENT-1]= FORMAT_DESCRIPTION_HEADER_LEN;
post_header_len[XID_EVENT-1]= XID_HEADER_LEN;
post_header_len[BEGIN_LOAD_QUERY_EVENT-1]= BEGIN_LOAD_QUERY_HEADER_LEN;
post_header_len[EXECUTE_LOAD_QUERY_EVENT-1]= EXECUTE_LOAD_QUERY_HEADER_LEN;
/*
The PRE_GA events are never be written to any binlog, but
their lengths are included in Format_description_log_event.
Hence, we need to be assign some value here, to avoid reading
uninitialized memory when the array is written to disk.
*/
post_header_len[PRE_GA_WRITE_ROWS_EVENT-1] = 0;
post_header_len[PRE_GA_UPDATE_ROWS_EVENT-1] = 0;
post_header_len[PRE_GA_DELETE_ROWS_EVENT-1] = 0;
post_header_len[TABLE_MAP_EVENT-1]= TABLE_MAP_HEADER_LEN;
post_header_len[WRITE_ROWS_EVENT-1]= ROWS_HEADER_LEN;
post_header_len[UPDATE_ROWS_EVENT-1]= ROWS_HEADER_LEN;
post_header_len[DELETE_ROWS_EVENT-1]= ROWS_HEADER_LEN;
/*
We here have the possibility to simulate a master of before we changed
the table map id to be stored in 6 bytes: when it was stored in 4
bytes (=> post_header_len was 6). This is used to test backward
compatibility.
This code can be removed after a few months (today is Dec 21st 2005),
when we know that the 4-byte masters are not deployed anymore (check
with Tomas Ulin first!), and the accompanying test (rpl_row_4_bytes)
too.
*/
DBUG_EXECUTE_IF("old_row_based_repl_4_byte_map_id_master",
post_header_len[TABLE_MAP_EVENT-1]=
post_header_len[WRITE_ROWS_EVENT-1]=
post_header_len[UPDATE_ROWS_EVENT-1]=
post_header_len[DELETE_ROWS_EVENT-1]= 6;);
post_header_len[INCIDENT_EVENT-1]= INCIDENT_HEADER_LEN;
// Sanity-check that all post header lengths are initialized.
IF_DBUG({
int i;
for (i=0; i<number_of_event_types; i++)
assert(post_header_len[i] != 255);
});
}
break;
case 1: /* 3.23 */
case 3: /* 4.0.x x>=2 */
/*
We build an artificial (i.e. not sent by the master) event, which
describes what those old master versions send.
*/
if (binlog_ver==1)
strmov(server_version, server_ver ? server_ver : "3.23");
else
strmov(server_version, server_ver ? server_ver : "4.0");
common_header_len= binlog_ver==1 ? OLD_HEADER_LEN :
LOG_EVENT_MINIMAL_HEADER_LEN;
/*
The first new event in binlog version 4 is Format_desc. So any event type
after that does not exist in older versions. We use the events known by
version 3, even if version 1 had only a subset of them (this is not a
problem: it uses a few bytes for nothing but unifies code; it does not
make the slave detect less corruptions).
*/
number_of_event_types= FORMAT_DESCRIPTION_EVENT - 1;
post_header_len=(uint8*) my_malloc(number_of_event_types*sizeof(uint8),
MYF(0));
if (post_header_len)
{
post_header_len[START_EVENT_V3-1]= START_V3_HEADER_LEN;
post_header_len[QUERY_EVENT-1]= QUERY_HEADER_MINIMAL_LEN;
post_header_len[STOP_EVENT-1]= 0;
post_header_len[ROTATE_EVENT-1]= (binlog_ver==1) ? 0 : ROTATE_HEADER_LEN;
post_header_len[INTVAR_EVENT-1]= 0;
post_header_len[LOAD_EVENT-1]= LOAD_HEADER_LEN;
post_header_len[SLAVE_EVENT-1]= 0;
post_header_len[CREATE_FILE_EVENT-1]= CREATE_FILE_HEADER_LEN;
post_header_len[APPEND_BLOCK_EVENT-1]= APPEND_BLOCK_HEADER_LEN;
post_header_len[EXEC_LOAD_EVENT-1]= EXEC_LOAD_HEADER_LEN;
post_header_len[DELETE_FILE_EVENT-1]= DELETE_FILE_HEADER_LEN;
post_header_len[NEW_LOAD_EVENT-1]= post_header_len[LOAD_EVENT-1];
post_header_len[RAND_EVENT-1]= 0;
post_header_len[USER_VAR_EVENT-1]= 0;
}
break;
default: /* Includes binlog version 2 i.e. 4.0.x x<=1 */
post_header_len= 0; /* will make is_valid() fail */
break;
}
calc_server_version_split();
}
/**
The problem with this constructor is that the fixed header may have a
length different from this version, but we don't know this length as we
have not read the Format_description_log_event which says it, yet. This
length is in the post-header of the event, but we don't know where the
post-header starts.
So this type of event HAS to:
- either have the header's length at the beginning (in the header, at a
fixed position which will never be changed), not in the post-header. That
would make the header be "shifted" compared to other events.
- or have a header of size LOG_EVENT_MINIMAL_HEADER_LEN (19), in all future
versions, so that we know for sure.
I (Guilhem) chose the 2nd solution. Rotate has the same constraint (because
it is sent before Format_description_log_event).
*/
Format_description_log_event::
Format_description_log_event(const char* buf,
uint event_len,
const
Format_description_log_event*
description_event)
:Start_log_event_v3(buf, description_event), event_type_permutation(0)
{
DBUG_ENTER("Format_description_log_event::Format_description_log_event(char*,...)");
buf+= LOG_EVENT_MINIMAL_HEADER_LEN;
if ((common_header_len=buf[ST_COMMON_HEADER_LEN_OFFSET]) < OLD_HEADER_LEN)
DBUG_VOID_RETURN; /* sanity check */
number_of_event_types=
event_len-(LOG_EVENT_MINIMAL_HEADER_LEN+ST_COMMON_HEADER_LEN_OFFSET+1);
DBUG_PRINT("info", ("common_header_len=%d number_of_event_types=%d",
common_header_len, number_of_event_types));
/* If alloc fails, we'll detect it in is_valid() */
post_header_len= (uint8*) my_memdup((uchar*)buf+ST_COMMON_HEADER_LEN_OFFSET+1,
number_of_event_types*
sizeof(*post_header_len), MYF(0));
calc_server_version_split();
/*
In some previous versions, the events were given other event type
id numbers than in the present version. When replicating from such
a version, we therefore set up an array that maps those id numbers
to the id numbers of the present server.
If post_header_len is null, it means malloc failed, and is_valid
will fail, so there is no need to do anything.
The trees in which events have wrong id's are:
mysql-5.1-wl1012.old mysql-5.1-wl2325-5.0-drop6p13-alpha
mysql-5.1-wl2325-5.0-drop6 mysql-5.1-wl2325-5.0
mysql-5.1-wl2325-no-dd
(this was found by grepping for two lines in sequence where the
first matches "FORMAT_DESCRIPTION_EVENT," and the second matches
"TABLE_MAP_EVENT," in log_event.h in all trees)
In these trees, the following server_versions existed since
TABLE_MAP_EVENT was introduced:
5.1.1-a_drop5p3 5.1.1-a_drop5p4 5.1.1-alpha
5.1.2-a_drop5p10 5.1.2-a_drop5p11 5.1.2-a_drop5p12
5.1.2-a_drop5p13 5.1.2-a_drop5p14 5.1.2-a_drop5p15
5.1.2-a_drop5p16 5.1.2-a_drop5p16b 5.1.2-a_drop5p16c
5.1.2-a_drop5p17 5.1.2-a_drop5p4 5.1.2-a_drop5p5
5.1.2-a_drop5p6 5.1.2-a_drop5p7 5.1.2-a_drop5p8
5.1.2-a_drop5p9 5.1.3-a_drop5p17 5.1.3-a_drop5p17b
5.1.3-a_drop5p17c 5.1.4-a_drop5p18 5.1.4-a_drop5p19
5.1.4-a_drop5p20 5.1.4-a_drop6p0 5.1.4-a_drop6p1
5.1.4-a_drop6p2 5.1.5-a_drop5p20 5.2.0-a_drop6p3
5.2.0-a_drop6p4 5.2.0-a_drop6p5 5.2.0-a_drop6p6
5.2.1-a_drop6p10 5.2.1-a_drop6p11 5.2.1-a_drop6p12
5.2.1-a_drop6p6 5.2.1-a_drop6p7 5.2.1-a_drop6p8
5.2.2-a_drop6p13 5.2.2-a_drop6p13-alpha 5.2.2-a_drop6p13b
5.2.2-a_drop6p13c
(this was found by grepping for "mysql," in all historical
versions of configure.in in the trees listed above).
There are 5.1.1-alpha versions that use the new event id's, so we
do not test that version string. So replication from 5.1.1-alpha
with the other event id's to a new version does not work.
Moreover, we can safely ignore the part after drop[56]. This
allows us to simplify the big list above to the following regexes:
5\.1\.[1-5]-a_drop5.*
5\.1\.4-a_drop6.*
5\.2\.[0-2]-a_drop6.*
This is what we test for in the 'if' below.
*/
if (post_header_len &&
server_version[0] == '5' && server_version[1] == '.' &&
server_version[3] == '.' &&
strncmp(server_version + 5, "-a_drop", 7) == 0 &&
((server_version[2] == '1' &&
server_version[4] >= '1' && server_version[4] <= '5' &&
server_version[12] == '5') ||
(server_version[2] == '1' &&
server_version[4] == '4' &&
server_version[12] == '6') ||
(server_version[2] == '2' &&
server_version[4] >= '0' && server_version[4] <= '2' &&
server_version[12] == '6')))
{
if (number_of_event_types != 22)
{
DBUG_PRINT("info", (" number_of_event_types=%d",
number_of_event_types));
/* this makes is_valid() return false. */
my_free(post_header_len, MYF(MY_ALLOW_ZERO_PTR));
post_header_len= NULL;
DBUG_VOID_RETURN;
}
static const uint8 perm[23]=
{
UNKNOWN_EVENT, START_EVENT_V3, QUERY_EVENT, STOP_EVENT, ROTATE_EVENT,
INTVAR_EVENT, LOAD_EVENT, SLAVE_EVENT, CREATE_FILE_EVENT,
APPEND_BLOCK_EVENT, EXEC_LOAD_EVENT, DELETE_FILE_EVENT,
NEW_LOAD_EVENT,
RAND_EVENT, USER_VAR_EVENT,
FORMAT_DESCRIPTION_EVENT,
TABLE_MAP_EVENT,
PRE_GA_WRITE_ROWS_EVENT,
PRE_GA_UPDATE_ROWS_EVENT,
PRE_GA_DELETE_ROWS_EVENT,
XID_EVENT,
BEGIN_LOAD_QUERY_EVENT,
EXECUTE_LOAD_QUERY_EVENT,
};
event_type_permutation= perm;
/*
Since we use (permuted) event id's to index the post_header_len
array, we need to permute the post_header_len array too.
*/
uint8 post_header_len_temp[23];
for (int i= 1; i < 23; i++)
post_header_len_temp[perm[i] - 1]= post_header_len[i - 1];
for (int i= 0; i < 22; i++)
post_header_len[i] = post_header_len_temp[i];
}
DBUG_VOID_RETURN;
}
#ifndef MYSQL_CLIENT
bool Format_description_log_event::write(IO_CACHE* file)
{
/*
We don't call Start_log_event_v3::write() because this would make 2
my_b_safe_write().
*/
uchar buff[FORMAT_DESCRIPTION_HEADER_LEN];
int2store(buff + ST_BINLOG_VER_OFFSET,binlog_version);
memcpy((char*) buff + ST_SERVER_VER_OFFSET,server_version,ST_SERVER_VER_LEN);
if (!dont_set_created)
created= when= get_time();
int4store(buff + ST_CREATED_OFFSET,created);
buff[ST_COMMON_HEADER_LEN_OFFSET]= LOG_EVENT_HEADER_LEN;
memcpy((char*) buff+ST_COMMON_HEADER_LEN_OFFSET+1, (uchar*) post_header_len,
LOG_EVENT_TYPES);
return (write_header(file, sizeof(buff)) ||
my_b_safe_write(file, buff, sizeof(buff)));
}
#endif
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int Format_description_log_event::do_apply_event(Relay_log_info const *rli)
{
int ret= 0;
DBUG_ENTER("Format_description_log_event::do_apply_event");
#ifdef USING_TRANSACTIONS
/*
As a transaction NEVER spans on 2 or more binlogs:
if we have an active transaction at this point, the master died
while writing the transaction to the binary log, i.e. while
flushing the binlog cache to the binlog. XA guarantees that master has
rolled back. So we roll back.
Note: this event could be sent by the master to inform us of the
format of its binlog; in other words maybe it is not at its
original place when it comes to us; we'll know this by checking
log_pos ("artificial" events have log_pos == 0).
*/
if (!is_artificial_event() && created && thd->transaction.all.ha_list)
{
/* This is not an error (XA is safe), just an information */
rli->report(INFORMATION_LEVEL, 0,
"Rolling back unfinished transaction (no COMMIT "
"or ROLLBACK in relay log). A probable cause is that "
"the master died while writing the transaction to "
"its binary log, thus rolled back too.");
const_cast<Relay_log_info*>(rli)->cleanup_context(thd, 1);
}
#endif
/*
If this event comes from ourselves, there is no cleaning task to
perform, we don't call Start_log_event_v3::do_apply_event()
(this was just to update the log's description event).
*/
if (server_id != (uint32) ::server_id)
{
/*
If the event was not requested by the slave i.e. the master sent
it while the slave asked for a position >4, the event will make
rli->group_master_log_pos advance. Say that the slave asked for
position 1000, and the Format_desc event's end is 96. Then in
the beginning of replication rli->group_master_log_pos will be
0, then 96, then jump to first really asked event (which is
>96). So this is ok.
*/
ret= Start_log_event_v3::do_apply_event(rli);
}
if (!ret)
{
/* Save the information describing this binlog */
delete rli->relay_log.description_event_for_exec;
const_cast<Relay_log_info *>(rli)->relay_log.description_event_for_exec= this;
}
DBUG_RETURN(ret);
}
int Format_description_log_event::do_update_pos(Relay_log_info *rli)
{
if (server_id == (uint32) ::server_id)
{
/*
We only increase the relay log position if we are skipping
events and do not touch any group_* variables, nor flush the
relay log info. If there is a crash, we will have to re-skip
the events again, but that is a minor issue.
If we do not skip stepping the group log position (and the
server id was changed when restarting the server), it might well
be that we start executing at a position that is invalid, e.g.,
at a Rows_log_event or a Query_log_event preceeded by a
Intvar_log_event instead of starting at a Table_map_log_event or
the Intvar_log_event respectively.
*/
rli->inc_event_relay_log_pos();
return 0;
}
else
{
return Log_event::do_update_pos(rli);
}
}
Log_event::enum_skip_reason
Format_description_log_event::do_shall_skip(Relay_log_info *rli)
{
return Log_event::EVENT_SKIP_NOT;
}
#endif
/**
Splits the event's 'server_version' string into three numeric pieces stored
into 'server_version_split':
X.Y.Zabc (X,Y,Z numbers, a not a digit) -> {X,Y,Z}
X.Yabc -> {X,Y,0}
Xabc -> {X,0,0}
'server_version_split' is then used for lookups to find if the server which
created this event has some known bug.
*/
void Format_description_log_event::calc_server_version_split()
{
char *p= server_version, *r;
ulong number;
for (uint i= 0; i<=2; i++)
{
number= strtoul(p, &r, 10);
server_version_split[i]= (uchar)number;
DBUG_ASSERT(number < 256); // fit in uchar
p= r;
DBUG_ASSERT(!((i == 0) && (*r != '.'))); // should be true in practice
if (*r == '.')
p++; // skip the dot
}
DBUG_PRINT("info",("Format_description_log_event::server_version_split:"
" '%s' %d %d %d", server_version,
server_version_split[0],
server_version_split[1], server_version_split[2]));
}
/**************************************************************************
Load_log_event methods
General note about Load_log_event: the binlogging of LOAD DATA INFILE is
going to be changed in 5.0 (or maybe in 5.1; not decided yet).
However, the 5.0 slave could still have to read such events (from a 4.x
master), convert them (which just means maybe expand the header, when 5.0
servers have a UID in events) (remember that whatever is after the header
will be like in 4.x, as this event's format is not modified in 5.0 as we
will use new types of events to log the new LOAD DATA INFILE features).
To be able to read/convert, we just need to not assume that the common
header is of length LOG_EVENT_HEADER_LEN (we must use the description
event).
Note that I (Guilhem) manually tested replication of a big LOAD DATA INFILE
between 3.23 and 5.0, and between 4.0 and 5.0, and it works fine (and the
positions displayed in SHOW SLAVE STATUS then are fine too).
**************************************************************************/
/*
Load_log_event::pack_info()
*/
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
uint Load_log_event::get_query_buffer_length()
{
return
5 + db_len + 3 + // "use DB; "
18 + fname_len + 2 + // "LOAD DATA INFILE 'file''"
11 + // "CONCURRENT "
7 + // LOCAL
9 + // " REPLACE or IGNORE "
13 + table_name_len*2 + // "INTO TABLE `table`"
21 + sql_ex.field_term_len*4 + 2 + // " FIELDS TERMINATED BY 'str'"
23 + sql_ex.enclosed_len*4 + 2 + // " OPTIONALLY ENCLOSED BY 'str'"
12 + sql_ex.escaped_len*4 + 2 + // " ESCAPED BY 'str'"
21 + sql_ex.line_term_len*4 + 2 + // " LINES TERMINATED BY 'str'"
19 + sql_ex.line_start_len*4 + 2 + // " LINES STARTING BY 'str'"
15 + 22 + // " IGNORE xxx LINES"
3 + (num_fields-1)*2 + field_block_len; // " (field1, field2, ...)"
}
void Load_log_event::print_query(bool need_db, const char *cs, char *buf,
char **end, char **fn_start, char **fn_end)
{
char *pos= buf;
if (need_db && db && db_len)
{
pos= strmov(pos, "use `");
memcpy(pos, db, db_len);
pos= strmov(pos+db_len, "`; ");
}
pos= strmov(pos, "LOAD DATA ");
if (thd->lex->lock_option == TL_WRITE_CONCURRENT_INSERT)
pos= strmov(pos, "CONCURRENT ");
if (fn_start)
*fn_start= pos;
if (check_fname_outside_temp_buf())
pos= strmov(pos, "LOCAL ");
pos= strmov(pos, "INFILE '");
memcpy(pos, fname, fname_len);
pos= strmov(pos+fname_len, "' ");
if (sql_ex.opt_flags & REPLACE_FLAG)
pos= strmov(pos, "REPLACE ");
else if (sql_ex.opt_flags & IGNORE_FLAG)
pos= strmov(pos, "IGNORE ");
pos= strmov(pos ,"INTO");
if (fn_end)
*fn_end= pos;
pos= strmov(pos ," TABLE `");
memcpy(pos, table_name, table_name_len);
pos+= table_name_len;
if (cs != NULL)
{
pos= strmov(pos ,"` CHARACTER SET ");
pos= strmov(pos , cs);
}
else
pos= strmov(pos, "`");
/* We have to create all optional fields as the default is not empty */
pos= strmov(pos, " FIELDS TERMINATED BY ");
pos= pretty_print_str(pos, sql_ex.field_term, sql_ex.field_term_len);
if (sql_ex.opt_flags & OPT_ENCLOSED_FLAG)
pos= strmov(pos, " OPTIONALLY ");
pos= strmov(pos, " ENCLOSED BY ");
pos= pretty_print_str(pos, sql_ex.enclosed, sql_ex.enclosed_len);
pos= strmov(pos, " ESCAPED BY ");
pos= pretty_print_str(pos, sql_ex.escaped, sql_ex.escaped_len);
pos= strmov(pos, " LINES TERMINATED BY ");
pos= pretty_print_str(pos, sql_ex.line_term, sql_ex.line_term_len);
if (sql_ex.line_start_len)
{
pos= strmov(pos, " STARTING BY ");
pos= pretty_print_str(pos, sql_ex.line_start, sql_ex.line_start_len);
}
if ((long) skip_lines > 0)
{
pos= strmov(pos, " IGNORE ");
pos= longlong10_to_str((longlong) skip_lines, pos, 10);
pos= strmov(pos," LINES ");
}
if (num_fields)
{
uint i;
const char *field= fields;
pos= strmov(pos, " (");
for (i = 0; i < num_fields; i++)
{
if (i)
{
*pos++= ' ';
*pos++= ',';
}
memcpy(pos, field, field_lens[i]);
pos+= field_lens[i];
field+= field_lens[i] + 1;
}
*pos++= ')';
}
*end= pos;
}
void Load_log_event::pack_info(Protocol *protocol)
{
char *buf, *end;
if (!(buf= (char*) my_malloc(get_query_buffer_length(), MYF(MY_WME))))
return;
print_query(TRUE, NULL, buf, &end, 0, 0);
protocol->store(buf, end-buf, &my_charset_bin);
my_free(buf, MYF(0));
}
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
#ifndef MYSQL_CLIENT
/*
Load_log_event::write_data_header()
*/
bool Load_log_event::write_data_header(IO_CACHE* file)
{
char buf[LOAD_HEADER_LEN];
int4store(buf + L_THREAD_ID_OFFSET, slave_proxy_id);
int4store(buf + L_EXEC_TIME_OFFSET, exec_time);
int4store(buf + L_SKIP_LINES_OFFSET, skip_lines);
buf[L_TBL_LEN_OFFSET] = (char)table_name_len;
buf[L_DB_LEN_OFFSET] = (char)db_len;
int4store(buf + L_NUM_FIELDS_OFFSET, num_fields);
return my_b_safe_write(file, (uchar*)buf, LOAD_HEADER_LEN) != 0;
}
/*
Load_log_event::write_data_body()
*/
bool Load_log_event::write_data_body(IO_CACHE* file)
{
if (sql_ex.write_data(file))
return 1;
if (num_fields && fields && field_lens)
{
if (my_b_safe_write(file, (uchar*)field_lens, num_fields) ||
my_b_safe_write(file, (uchar*)fields, field_block_len))
return 1;
}
return (my_b_safe_write(file, (uchar*)table_name, table_name_len + 1) ||
my_b_safe_write(file, (uchar*)db, db_len + 1) ||
my_b_safe_write(file, (uchar*)fname, fname_len));
}
/*
Load_log_event::Load_log_event()
*/
Load_log_event::Load_log_event(THD *thd_arg, sql_exchange *ex,
const char *db_arg, const char *table_name_arg,
List<Item> &fields_arg,
enum enum_duplicates handle_dup,
bool ignore, bool using_trans)
:Log_event(thd_arg,
thd_arg->thread_specific_used ? LOG_EVENT_THREAD_SPECIFIC_F : 0,
using_trans),
thread_id(thd_arg->thread_id),
slave_proxy_id(thd_arg->variables.pseudo_thread_id),
num_fields(0),fields(0),
field_lens(0),field_block_len(0),
table_name(table_name_arg ? table_name_arg : ""),
db(db_arg), fname(ex->file_name), local_fname(FALSE)
{
time_t end_time;
time(&end_time);
exec_time = (ulong) (end_time - thd_arg->start_time);
/* db can never be a zero pointer in 4.0 */
db_len = (uint32) strlen(db);
table_name_len = (uint32) strlen(table_name);
fname_len = (fname) ? (uint) strlen(fname) : 0;
sql_ex.field_term = (char*) ex->field_term->ptr();
sql_ex.field_term_len = (uint8) ex->field_term->length();
sql_ex.enclosed = (char*) ex->enclosed->ptr();
sql_ex.enclosed_len = (uint8) ex->enclosed->length();
sql_ex.line_term = (char*) ex->line_term->ptr();
sql_ex.line_term_len = (uint8) ex->line_term->length();
sql_ex.line_start = (char*) ex->line_start->ptr();
sql_ex.line_start_len = (uint8) ex->line_start->length();
sql_ex.escaped = (char*) ex->escaped->ptr();
sql_ex.escaped_len = (uint8) ex->escaped->length();
sql_ex.opt_flags = 0;
sql_ex.cached_new_format = -1;
if (ex->dumpfile)
sql_ex.opt_flags|= DUMPFILE_FLAG;
if (ex->opt_enclosed)
sql_ex.opt_flags|= OPT_ENCLOSED_FLAG;
sql_ex.empty_flags= 0;
switch (handle_dup) {
case DUP_REPLACE:
sql_ex.opt_flags|= REPLACE_FLAG;
break;
case DUP_UPDATE: // Impossible here
case DUP_ERROR:
break;
}
if (ignore)
sql_ex.opt_flags|= IGNORE_FLAG;
if (!ex->field_term->length())
sql_ex.empty_flags |= FIELD_TERM_EMPTY;
if (!ex->enclosed->length())
sql_ex.empty_flags |= ENCLOSED_EMPTY;
if (!ex->line_term->length())
sql_ex.empty_flags |= LINE_TERM_EMPTY;
if (!ex->line_start->length())
sql_ex.empty_flags |= LINE_START_EMPTY;
if (!ex->escaped->length())
sql_ex.empty_flags |= ESCAPED_EMPTY;
skip_lines = ex->skip_lines;
List_iterator<Item> li(fields_arg);
field_lens_buf.length(0);
fields_buf.length(0);
Item* item;
while ((item = li++))
{
num_fields++;
uchar len = (uchar) strlen(item->name);
field_block_len += len + 1;
fields_buf.append(item->name, len + 1);
field_lens_buf.append((char*)&len, 1);
}
field_lens = (const uchar*)field_lens_buf.ptr();
fields = fields_buf.ptr();
}
#endif /* !MYSQL_CLIENT */
/**
@note
The caller must do buf[event_len] = 0 before he starts using the
constructed event.
*/
Load_log_event::Load_log_event(const char *buf, uint event_len,
const Format_description_log_event *description_event)
:Log_event(buf, description_event), num_fields(0), fields(0),
field_lens(0),field_block_len(0),
table_name(0), db(0), fname(0), local_fname(FALSE)
{
DBUG_ENTER("Load_log_event");
/*
I (Guilhem) manually tested replication of LOAD DATA INFILE for 3.23->5.0,
4.0->5.0 and 5.0->5.0 and it works.
*/
if (event_len)
copy_log_event(buf, event_len,
((buf[EVENT_TYPE_OFFSET] == LOAD_EVENT) ?
LOAD_HEADER_LEN +
description_event->common_header_len :
LOAD_HEADER_LEN + LOG_EVENT_HEADER_LEN),
description_event);
/* otherwise it's a derived class, will call copy_log_event() itself */
DBUG_VOID_RETURN;
}
/*
Load_log_event::copy_log_event()
*/
int Load_log_event::copy_log_event(const char *buf, ulong event_len,
int body_offset,
const Format_description_log_event *description_event)
{
DBUG_ENTER("Load_log_event::copy_log_event");
uint data_len;
char* buf_end = (char*)buf + event_len;
/* this is the beginning of the post-header */
const char* data_head = buf + description_event->common_header_len;
slave_proxy_id= thread_id= uint4korr(data_head + L_THREAD_ID_OFFSET);
exec_time = uint4korr(data_head + L_EXEC_TIME_OFFSET);
skip_lines = uint4korr(data_head + L_SKIP_LINES_OFFSET);
table_name_len = (uint)data_head[L_TBL_LEN_OFFSET];
db_len = (uint)data_head[L_DB_LEN_OFFSET];
num_fields = uint4korr(data_head + L_NUM_FIELDS_OFFSET);
if ((int) event_len < body_offset)
DBUG_RETURN(1);
/*
Sql_ex.init() on success returns the pointer to the first byte after
the sql_ex structure, which is the start of field lengths array.
*/
if (!(field_lens= (uchar*)sql_ex.init((char*)buf + body_offset,
buf_end,
buf[EVENT_TYPE_OFFSET] != LOAD_EVENT)))
DBUG_RETURN(1);
data_len = event_len - body_offset;
if (num_fields > data_len) // simple sanity check against corruption
DBUG_RETURN(1);
for (uint i = 0; i < num_fields; i++)
field_block_len += (uint)field_lens[i] + 1;
fields = (char*)field_lens + num_fields;
table_name = fields + field_block_len;
db = table_name + table_name_len + 1;
fname = db + db_len + 1;
fname_len = (uint) strlen(fname);
// null termination is accomplished by the caller doing buf[event_len]=0
DBUG_RETURN(0);
}
/*
Load_log_event::print()
*/
#ifdef MYSQL_CLIENT
void Load_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
{
print(file, print_event_info, 0);
}
void Load_log_event::print(FILE* file_arg, PRINT_EVENT_INFO* print_event_info,
bool commented)
{
Write_on_release_cache cache(&print_event_info->head_cache, file_arg);
DBUG_ENTER("Load_log_event::print");
if (!print_event_info->short_form)
{
print_header(&cache, print_event_info, FALSE);
my_b_printf(&cache, "\tQuery\tthread_id=%ld\texec_time=%ld\n",
thread_id, exec_time);
}
bool different_db= 1;
if (db)
{
/*
If the database is different from the one of the previous statement, we
need to print the "use" command, and we update the last_db.
But if commented, the "use" is going to be commented so we should not
update the last_db.
*/
if ((different_db= memcmp(print_event_info->db, db, db_len + 1)) &&
!commented)
memcpy(print_event_info->db, db, db_len + 1);
}
if (db && db[0] && different_db)
my_b_printf(&cache, "%suse %s%s\n",
commented ? "# " : "",
db, print_event_info->delimiter);
if (flags & LOG_EVENT_THREAD_SPECIFIC_F)
my_b_printf(&cache,"%sSET @@session.pseudo_thread_id=%lu%s\n",
commented ? "# " : "", (ulong)thread_id,
print_event_info->delimiter);
my_b_printf(&cache, "%sLOAD DATA ",
commented ? "# " : "");
if (check_fname_outside_temp_buf())
my_b_printf(&cache, "LOCAL ");
my_b_printf(&cache, "INFILE '%-*s' ", fname_len, fname);
if (sql_ex.opt_flags & REPLACE_FLAG)
my_b_printf(&cache,"REPLACE ");
else if (sql_ex.opt_flags & IGNORE_FLAG)
my_b_printf(&cache,"IGNORE ");
my_b_printf(&cache, "INTO TABLE `%s`", table_name);
my_b_printf(&cache, " FIELDS TERMINATED BY ");
pretty_print_str(&cache, sql_ex.field_term, sql_ex.field_term_len);
if (sql_ex.opt_flags & OPT_ENCLOSED_FLAG)
my_b_printf(&cache," OPTIONALLY ");
my_b_printf(&cache, " ENCLOSED BY ");
pretty_print_str(&cache, sql_ex.enclosed, sql_ex.enclosed_len);
my_b_printf(&cache, " ESCAPED BY ");
pretty_print_str(&cache, sql_ex.escaped, sql_ex.escaped_len);
my_b_printf(&cache," LINES TERMINATED BY ");
pretty_print_str(&cache, sql_ex.line_term, sql_ex.line_term_len);
if (sql_ex.line_start)
{
my_b_printf(&cache," STARTING BY ");
pretty_print_str(&cache, sql_ex.line_start, sql_ex.line_start_len);
}
if ((long) skip_lines > 0)
my_b_printf(&cache, " IGNORE %ld LINES", (long) skip_lines);
if (num_fields)
{
uint i;
const char* field = fields;
my_b_printf(&cache, " (");
for (i = 0; i < num_fields; i++)
{
if (i)
my_b_printf(&cache, ",");
my_b_printf(&cache, "%s", field);
field += field_lens[i] + 1;
}
my_b_printf(&cache, ")");
}
my_b_printf(&cache, "%s\n", print_event_info->delimiter);
DBUG_VOID_RETURN;
}
#endif /* MYSQL_CLIENT */
#ifndef MYSQL_CLIENT
/**
Load_log_event::set_fields()
@note
This function can not use the member variable
for the database, since LOAD DATA INFILE on the slave
can be for a different database than the current one.
This is the reason for the affected_db argument to this method.
*/
void Load_log_event::set_fields(const char* affected_db,
List<Item> &field_list,
Name_resolution_context *context)
{
uint i;
const char* field = fields;
for (i= 0; i < num_fields; i++)
{
field_list.push_back(new Item_field(context,
affected_db, table_name, field));
field+= field_lens[i] + 1;
}
}
#endif /* !MYSQL_CLIENT */
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
/**
Does the data loading job when executing a LOAD DATA on the slave.
@param net
@param rli
@param use_rli_only_for_errors If set to 1, rli is provided to
Load_log_event::exec_event only for this
function to have RPL_LOG_NAME and
rli->last_slave_error, both being used by
error reports. rli's position advancing
is skipped (done by the caller which is
Execute_load_log_event::exec_event).
If set to 0, rli is provided for full use,
i.e. for error reports and position
advancing.
@todo
fix this; this can be done by testing rules in
Create_file_log_event::exec_event() and then discarding Append_block and
al.
@todo
this is a bug - this needs to be moved to the I/O thread
@retval
0 Success
@retval
1 Failure
*/
int Load_log_event::do_apply_event(NET* net, Relay_log_info const *rli,
bool use_rli_only_for_errors)
{
LEX_STRING new_db;
new_db.length= db_len;
new_db.str= (char *) rpl_filter->get_rewrite_db(db, &new_db.length);
thd->set_db(new_db.str, new_db.length);
DBUG_ASSERT(thd->query() == 0);
thd->set_query_inner(NULL, 0); // Should not be needed
thd->is_slave_error= 0;
clear_all_errors(thd, const_cast<Relay_log_info*>(rli));
/* see Query_log_event::do_apply_event() and BUG#13360 */
DBUG_ASSERT(!rli->m_table_map.count());
/*
Usually lex_start() is called by mysql_parse(), but we need it here
as the present method does not call mysql_parse().
*/
lex_start(thd);
thd->lex->local_file= local_fname;
mysql_reset_thd_for_next_command(thd);
if (!use_rli_only_for_errors)
{
/*
Saved for InnoDB, see comment in
Query_log_event::do_apply_event()
*/
const_cast<Relay_log_info*>(rli)->future_group_master_log_pos= log_pos;
DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));
}
/*
We test replicate_*_db rules. Note that we have already prepared
the file to load, even if we are going to ignore and delete it
now. So it is possible that we did a lot of disk writes for
nothing. In other words, a big LOAD DATA INFILE on the master will
still consume a lot of space on the slave (space in the relay log
+ space of temp files: twice the space of the file to load...)
even if it will finally be ignored. TODO: fix this; this can be
done by testing rules in Create_file_log_event::do_apply_event()
and then discarding Append_block and al. Another way is do the
filtering in the I/O thread (more efficient: no disk writes at
all).
Note: We do not need to execute reset_one_shot_variables() if this
db_ok() test fails.
Reason: The db stored in binlog events is the same for SET and for
its companion query. If the SET is ignored because of
db_ok(), the companion query will also be ignored, and if
the companion query is ignored in the db_ok() test of
::do_apply_event(), then the companion SET also have so
we don't need to reset_one_shot_variables().
*/
if (rpl_filter->db_ok(thd->db))
{
thd->set_time((time_t)when);
VOID(pthread_mutex_lock(&LOCK_thread_count));
thd->query_id = next_query_id();
VOID(pthread_mutex_unlock(&LOCK_thread_count));
/*
Initing thd->row_count is not necessary in theory as this variable has no
influence in the case of the slave SQL thread (it is used to generate a
"data truncated" warning but which is absorbed and never gets to the
error log); still we init it to avoid a Valgrind message.
*/
mysql_reset_errors(thd, 0);
TABLE_LIST tables;
bzero((char*) &tables,sizeof(tables));
tables.db= thd->strmake(thd->db, thd->db_length);
tables.alias = tables.table_name = (char*) table_name;
tables.lock_type = TL_WRITE;
tables.updating= 1;
// the table will be opened in mysql_load
if (rpl_filter->is_on() && !rpl_filter->tables_ok(thd->db, &tables))
{
// TODO: this is a bug - this needs to be moved to the I/O thread
if (net)
skip_load_data_infile(net);
}
else
{
char llbuff[22];
char *end;
enum enum_duplicates handle_dup;
bool ignore= 0;
char *load_data_query;
/*
Forge LOAD DATA INFILE query which will be used in SHOW PROCESS LIST
and written to slave's binlog if binlogging is on.
*/
if (!(load_data_query= (char *)thd->alloc(get_query_buffer_length() + 1)))
{
/*
This will set thd->fatal_error in case of OOM. So we surely will notice
that something is wrong.
*/
goto error;
}
print_query(FALSE, NULL, load_data_query, &end, NULL, NULL);
*end= 0;
thd->set_query(load_data_query, (uint) (end - load_data_query));
if (sql_ex.opt_flags & REPLACE_FLAG)
{
handle_dup= DUP_REPLACE;
}
else if (sql_ex.opt_flags & IGNORE_FLAG)
{
ignore= 1;
handle_dup= DUP_ERROR;
}
else
{
/*
When replication is running fine, if it was DUP_ERROR on the
master then we could choose IGNORE here, because if DUP_ERROR
suceeded on master, and data is identical on the master and slave,
then there should be no uniqueness errors on slave, so IGNORE is
the same as DUP_ERROR. But in the unlikely case of uniqueness errors
(because the data on the master and slave happen to be different
(user error or bug), we want LOAD DATA to print an error message on
the slave to discover the problem.
If reading from net (a 3.23 master), mysql_load() will change this
to IGNORE.
*/
handle_dup= DUP_ERROR;
}
/*
We need to set thd->lex->sql_command and thd->lex->duplicates
since InnoDB tests these variables to decide if this is a LOAD
DATA ... REPLACE INTO ... statement even though mysql_parse()
is not called. This is not needed in 5.0 since there the LOAD
DATA ... statement is replicated using mysql_parse(), which
sets the thd->lex fields correctly.
*/
thd->lex->sql_command= SQLCOM_LOAD;
thd->lex->duplicates= handle_dup;
sql_exchange ex((char*)fname, sql_ex.opt_flags & DUMPFILE_FLAG);
String field_term(sql_ex.field_term,sql_ex.field_term_len,log_cs);
String enclosed(sql_ex.enclosed,sql_ex.enclosed_len,log_cs);
String line_term(sql_ex.line_term,sql_ex.line_term_len,log_cs);
String line_start(sql_ex.line_start,sql_ex.line_start_len,log_cs);
String escaped(sql_ex.escaped,sql_ex.escaped_len, log_cs);
ex.field_term= &field_term;
ex.enclosed= &enclosed;
ex.line_term= &line_term;
ex.line_start= &line_start;
ex.escaped= &escaped;
ex.opt_enclosed = (sql_ex.opt_flags & OPT_ENCLOSED_FLAG);
if (sql_ex.empty_flags & FIELD_TERM_EMPTY)
ex.field_term->length(0);
ex.skip_lines = skip_lines;
List<Item> field_list;
thd->lex->select_lex.context.resolve_in_table_list_only(&tables);
set_fields(tables.db, field_list, &thd->lex->select_lex.context);
thd->variables.pseudo_thread_id= thread_id;
if (net)
{
// mysql_load will use thd->net to read the file
thd->net.vio = net->vio;
/*
Make sure the client does not get confused about the packet sequence
*/
thd->net.pkt_nr = net->pkt_nr;
}
/*
It is safe to use tmp_list twice because we are not going to
update it inside mysql_load().
*/
List<Item> tmp_list;
if (mysql_load(thd, &ex, &tables, field_list, tmp_list, tmp_list,
handle_dup, ignore, net != 0))
thd->is_slave_error= 1;
if (thd->cuted_fields)
{
/* log_pos is the position of the LOAD event in the master log */
sql_print_warning("Slave: load data infile on table '%s' at "
"log position %s in log '%s' produced %ld "
"warning(s). Default database: '%s'",
(char*) table_name,
llstr(log_pos,llbuff), RPL_LOG_NAME,
(ulong) thd->cuted_fields,
print_slave_db_safe(thd->db));
}
if (net)
net->pkt_nr= thd->net.pkt_nr;
}
}
else
{
/*
We will just ask the master to send us /dev/null if we do not
want to load the data.
TODO: this a bug - needs to be done in I/O thread
*/
if (net)
skip_load_data_infile(net);
}
error:
thd->net.vio = 0;
const char *remember_db= thd->db;
thd->catalog= 0;
thd->set_db(NULL, 0); /* will free the current database */
thd->set_query(NULL, 0);
close_thread_tables(thd);
DBUG_EXECUTE_IF("LOAD_DATA_INFILE_has_fatal_error",
thd->is_slave_error= 0; thd->is_fatal_error= 1;);
if (thd->is_slave_error)
{
/* this err/sql_errno code is copy-paste from net_send_error() */
const char *err;
int sql_errno;
if (thd->is_error())
{
err= thd->main_da.message();
sql_errno= thd->main_da.sql_errno();
}
else
{
sql_errno=ER_UNKNOWN_ERROR;
err=ER(sql_errno);
}
rli->report(ERROR_LEVEL, sql_errno,"\
Error '%s' running LOAD DATA INFILE on table '%s'. Default database: '%s'",
err, (char*)table_name, print_slave_db_safe(remember_db));
free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
return 1;
}
free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
if (thd->is_fatal_error)
{
char buf[256];
my_snprintf(buf, sizeof(buf),
"Running LOAD DATA INFILE on table '%-.64s'."
" Default database: '%-.64s'",
(char*)table_name,
print_slave_db_safe(remember_db));
rli->report(ERROR_LEVEL, ER_SLAVE_FATAL_ERROR,
ER(ER_SLAVE_FATAL_ERROR), buf);
return 1;
}
return ( use_rli_only_for_errors ? 0 : Log_event::do_apply_event(rli) );
}
#endif
/**************************************************************************
Rotate_log_event methods
**************************************************************************/
/*
Rotate_log_event::pack_info()
*/
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Rotate_log_event::pack_info(Protocol *protocol)
{
char buf1[256], buf[22];
String tmp(buf1, sizeof(buf1), log_cs);
tmp.length(0);
tmp.append(new_log_ident, ident_len);
tmp.append(STRING_WITH_LEN(";pos="));
tmp.append(llstr(pos,buf));
protocol->store(tmp.ptr(), tmp.length(), &my_charset_bin);
}
#endif
/*
Rotate_log_event::print()
*/
#ifdef MYSQL_CLIENT
void Rotate_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
{
char buf[22];
Write_on_release_cache cache(&print_event_info->head_cache, file,
Write_on_release_cache::FLUSH_F);
if (print_event_info->short_form)
return;
print_header(&cache, print_event_info, FALSE);
my_b_printf(&cache, "\tRotate to ");
if (new_log_ident)
my_b_write(&cache, (uchar*) new_log_ident, (uint)ident_len);
my_b_printf(&cache, " pos: %s\n", llstr(pos, buf));
}
#endif /* MYSQL_CLIENT */
/*
Rotate_log_event::Rotate_log_event() (2 constructors)
*/
#ifndef MYSQL_CLIENT
Rotate_log_event::Rotate_log_event(const char* new_log_ident_arg,
uint ident_len_arg, ulonglong pos_arg,
uint flags_arg)
:Log_event(), new_log_ident(new_log_ident_arg),
pos(pos_arg),ident_len(ident_len_arg ? ident_len_arg :
(uint) strlen(new_log_ident_arg)), flags(flags_arg)
{
#ifndef DBUG_OFF
char buff[22];
DBUG_ENTER("Rotate_log_event::Rotate_log_event(...,flags)");
DBUG_PRINT("enter",("new_log_ident: %s pos: %s flags: %lu", new_log_ident_arg,
llstr(pos_arg, buff), (ulong) flags));
#endif
if (flags & DUP_NAME)
new_log_ident= my_strndup(new_log_ident_arg, ident_len, MYF(MY_WME));
if (flags & RELAY_LOG)
set_relay_log_event();
DBUG_VOID_RETURN;
}
#endif
Rotate_log_event::Rotate_log_event(const char* buf, uint event_len,
const Format_description_log_event* description_event)
:Log_event(buf, description_event) ,new_log_ident(0), flags(DUP_NAME)
{
DBUG_ENTER("Rotate_log_event::Rotate_log_event(char*,...)");
// The caller will ensure that event_len is what we have at EVENT_LEN_OFFSET
uint8 header_size= description_event->common_header_len;
uint8 post_header_len= description_event->post_header_len[ROTATE_EVENT-1];
uint ident_offset;
if (event_len < header_size)
DBUG_VOID_RETURN;
buf += header_size;
pos = post_header_len ? uint8korr(buf + R_POS_OFFSET) : 4;
ident_len = (uint)(event_len -
(header_size+post_header_len));
ident_offset = post_header_len;
set_if_smaller(ident_len,FN_REFLEN-1);
new_log_ident= my_strndup(buf + ident_offset, (uint) ident_len, MYF(MY_WME));
DBUG_PRINT("debug", ("new_log_ident: '%s'", new_log_ident));
DBUG_VOID_RETURN;
}
/*
Rotate_log_event::write()
*/
#ifndef MYSQL_CLIENT
bool Rotate_log_event::write(IO_CACHE* file)
{
char buf[ROTATE_HEADER_LEN];
int8store(buf + R_POS_OFFSET, pos);
return (write_header(file, ROTATE_HEADER_LEN + ident_len) ||
my_b_safe_write(file, (uchar*)buf, ROTATE_HEADER_LEN) ||
my_b_safe_write(file, (uchar*)new_log_ident, (uint) ident_len));
}
#endif
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
/*
Got a rotate log event from the master.
This is mainly used so that we can later figure out the logname and
position for the master.
We can't rotate the slave's BINlog as this will cause infinitive rotations
in a A -> B -> A setup.
The NOTES below is a wrong comment which will disappear when 4.1 is merged.
@retval
0 ok
*/
int Rotate_log_event::do_update_pos(Relay_log_info *rli)
{
DBUG_ENTER("Rotate_log_event::do_update_pos");
#ifndef DBUG_OFF
char buf[32];
#endif
DBUG_PRINT("info", ("server_id=%lu; ::server_id=%lu",
(ulong) this->server_id, (ulong) ::server_id));
DBUG_PRINT("info", ("new_log_ident: %s", this->new_log_ident));
DBUG_PRINT("info", ("pos: %s", llstr(this->pos, buf)));
/*
If we are in a transaction or in a group: the only normal case is
when the I/O thread was copying a big transaction, then it was
stopped and restarted: we have this in the relay log:
BEGIN
...
ROTATE (a fake one)
...
COMMIT or ROLLBACK
In that case, we don't want to touch the coordinates which
correspond to the beginning of the transaction. Starting from
5.0.0, there also are some rotates from the slave itself, in the
relay log, which shall not change the group positions.
*/
if ((server_id != ::server_id || rli->replicate_same_server_id) &&
!is_relay_log_event() &&
!rli->is_in_group())
{
pthread_mutex_lock(&rli->data_lock);
DBUG_PRINT("info", ("old group_master_log_name: '%s' "
"old group_master_log_pos: %lu",
rli->group_master_log_name,
(ulong) rli->group_master_log_pos));
memcpy(rli->group_master_log_name, new_log_ident, ident_len+1);
rli->notify_group_master_log_name_update();
rli->inc_group_relay_log_pos(pos, TRUE /* skip_lock */);
DBUG_PRINT("info", ("new group_master_log_name: '%s' "
"new group_master_log_pos: %lu",
rli->group_master_log_name,
(ulong) rli->group_master_log_pos));
pthread_mutex_unlock(&rli->data_lock);
flush_relay_log_info(rli);
/*
Reset thd->options and sql_mode etc, because this could be the signal of
a master's downgrade from 5.0 to 4.0.
However, no need to reset description_event_for_exec: indeed, if the next
master is 5.0 (even 5.0.1) we will soon get a Format_desc; if the next
master is 4.0 then the events are in the slave's format (conversion).
*/
set_slave_thread_options(thd);
set_slave_thread_default_charset(thd, rli);
thd->variables.sql_mode= global_system_variables.sql_mode;
thd->variables.auto_increment_increment=
thd->variables.auto_increment_offset= 1;
}
else
rli->inc_event_relay_log_pos();
DBUG_RETURN(0);
}
Log_event::enum_skip_reason
Rotate_log_event::do_shall_skip(Relay_log_info *rli)
{
enum_skip_reason reason= Log_event::do_shall_skip(rli);
switch (reason) {
case Log_event::EVENT_SKIP_NOT:
case Log_event::EVENT_SKIP_COUNT:
return Log_event::EVENT_SKIP_NOT;
case Log_event::EVENT_SKIP_IGNORE:
return Log_event::EVENT_SKIP_IGNORE;
}
DBUG_ASSERT(0);
return Log_event::EVENT_SKIP_NOT; // To keep compiler happy
}
#endif
/**************************************************************************
Intvar_log_event methods
**************************************************************************/
/*
Intvar_log_event::pack_info()
*/
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Intvar_log_event::pack_info(Protocol *protocol)
{
char buf[256], *pos;
pos= strmake(buf, get_var_type_name(), sizeof(buf)-23);
*pos++= '=';
pos= longlong10_to_str(val, pos, -10);
protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
}
#endif
/*
Intvar_log_event::Intvar_log_event()
*/
Intvar_log_event::Intvar_log_event(const char* buf,
const Format_description_log_event* description_event)
:Log_event(buf, description_event)
{
/* The Post-Header is empty. The Varible Data part begins immediately. */
buf+= description_event->common_header_len +
description_event->post_header_len[INTVAR_EVENT-1];
type= buf[I_TYPE_OFFSET];
val= uint8korr(buf+I_VAL_OFFSET);
}
/*
Intvar_log_event::get_var_type_name()
*/
const char* Intvar_log_event::get_var_type_name()
{
switch(type) {
case LAST_INSERT_ID_EVENT: return "LAST_INSERT_ID";
case INSERT_ID_EVENT: return "INSERT_ID";
default: /* impossible */ return "UNKNOWN";
}
}
/*
Intvar_log_event::write()
*/
#ifndef MYSQL_CLIENT
bool Intvar_log_event::write(IO_CACHE* file)
{
uchar buf[9];
buf[I_TYPE_OFFSET]= (uchar) type;
int8store(buf + I_VAL_OFFSET, val);
return (write_header(file, sizeof(buf)) ||
my_b_safe_write(file, buf, sizeof(buf)));
}
#endif
/*
Intvar_log_event::print()
*/
#ifdef MYSQL_CLIENT
void Intvar_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
{
char llbuff[22];
const char *msg;
LINT_INIT(msg);
Write_on_release_cache cache(&print_event_info->head_cache, file,
Write_on_release_cache::FLUSH_F);
if (!print_event_info->short_form)
{
print_header(&cache, print_event_info, FALSE);
my_b_printf(&cache, "\tIntvar\n");
}
my_b_printf(&cache, "SET ");
switch (type) {
case LAST_INSERT_ID_EVENT:
msg="LAST_INSERT_ID";
break;
case INSERT_ID_EVENT:
msg="INSERT_ID";
break;
case INVALID_INT_EVENT:
default: // cannot happen
msg="INVALID_INT";
break;
}
my_b_printf(&cache, "%s=%s%s\n",
msg, llstr(val,llbuff), print_event_info->delimiter);
}
#endif
/*
Intvar_log_event::do_apply_event()
*/
#if defined(HAVE_REPLICATION)&& !defined(MYSQL_CLIENT)
int Intvar_log_event::do_apply_event(Relay_log_info const *rli)
{
/*
We are now in a statement until the associated query log event has
been processed.
*/
const_cast<Relay_log_info*>(rli)->set_flag(Relay_log_info::IN_STMT);
switch (type) {
case LAST_INSERT_ID_EVENT:
thd->stmt_depends_on_first_successful_insert_id_in_prev_stmt= 1;
thd->first_successful_insert_id_in_prev_stmt= val;
break;
case INSERT_ID_EVENT:
thd->force_one_auto_inc_interval(val);
break;
}
return 0;
}
int Intvar_log_event::do_update_pos(Relay_log_info *rli)
{
rli->inc_event_relay_log_pos();
return 0;
}
Log_event::enum_skip_reason
Intvar_log_event::do_shall_skip(Relay_log_info *rli)
{
/*
It is a common error to set the slave skip counter to 1 instead of
2 when recovering from an insert which used a auto increment,
rand, or user var. Therefore, if the slave skip counter is 1, we
just say that this event should be skipped by ignoring it, meaning
that we do not change the value of the slave skip counter since it
will be decreased by the following insert event.
*/
return continue_group(rli);
}
#endif
/**************************************************************************
Rand_log_event methods
**************************************************************************/
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Rand_log_event::pack_info(Protocol *protocol)
{
char buf1[256], *pos;
pos= strmov(buf1,"rand_seed1=");
pos= int10_to_str((long) seed1, pos, 10);
pos= strmov(pos, ",rand_seed2=");
pos= int10_to_str((long) seed2, pos, 10);
protocol->store(buf1, (uint) (pos-buf1), &my_charset_bin);
}
#endif
Rand_log_event::Rand_log_event(const char* buf,
const Format_description_log_event* description_event)
:Log_event(buf, description_event)
{
/* The Post-Header is empty. The Variable Data part begins immediately. */
buf+= description_event->common_header_len +
description_event->post_header_len[RAND_EVENT-1];
seed1= uint8korr(buf+RAND_SEED1_OFFSET);
seed2= uint8korr(buf+RAND_SEED2_OFFSET);
}
#ifndef MYSQL_CLIENT
bool Rand_log_event::write(IO_CACHE* file)
{
uchar buf[16];
int8store(buf + RAND_SEED1_OFFSET, seed1);
int8store(buf + RAND_SEED2_OFFSET, seed2);
return (write_header(file, sizeof(buf)) ||
my_b_safe_write(file, buf, sizeof(buf)));
}
#endif
#ifdef MYSQL_CLIENT
void Rand_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
{
Write_on_release_cache cache(&print_event_info->head_cache, file,
Write_on_release_cache::FLUSH_F);
char llbuff[22],llbuff2[22];
if (!print_event_info->short_form)
{
print_header(&cache, print_event_info, FALSE);
my_b_printf(&cache, "\tRand\n");
}
my_b_printf(&cache, "SET @@RAND_SEED1=%s, @@RAND_SEED2=%s%s\n",
llstr(seed1, llbuff),llstr(seed2, llbuff2),
print_event_info->delimiter);
}
#endif /* MYSQL_CLIENT */
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int Rand_log_event::do_apply_event(Relay_log_info const *rli)
{
/*
We are now in a statement until the associated query log event has
been processed.
*/
const_cast<Relay_log_info*>(rli)->set_flag(Relay_log_info::IN_STMT);
thd->rand.seed1= (ulong) seed1;
thd->rand.seed2= (ulong) seed2;
return 0;
}
int Rand_log_event::do_update_pos(Relay_log_info *rli)
{
rli->inc_event_relay_log_pos();
return 0;
}
Log_event::enum_skip_reason
Rand_log_event::do_shall_skip(Relay_log_info *rli)
{
/*
It is a common error to set the slave skip counter to 1 instead of
2 when recovering from an insert which used a auto increment,
rand, or user var. Therefore, if the slave skip counter is 1, we
just say that this event should be skipped by ignoring it, meaning
that we do not change the value of the slave skip counter since it
will be decreased by the following insert event.
*/
return continue_group(rli);
}
#endif /* !MYSQL_CLIENT */
/**************************************************************************
Xid_log_event methods
**************************************************************************/
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Xid_log_event::pack_info(Protocol *protocol)
{
char buf[128], *pos;
pos= strmov(buf, "COMMIT /* xid=");
pos= longlong10_to_str(xid, pos, 10);
pos= strmov(pos, " */");
protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
}
#endif
/**
@note
It's ok not to use int8store here,
as long as xid_t::set(ulonglong) and
xid_t::get_my_xid doesn't do it either.
We don't care about actual values of xids as long as
identical numbers compare identically
*/
Xid_log_event::
Xid_log_event(const char* buf,
const Format_description_log_event *description_event)
:Log_event(buf, description_event)
{
/* The Post-Header is empty. The Variable Data part begins immediately. */
buf+= description_event->common_header_len +
description_event->post_header_len[XID_EVENT-1];
memcpy((char*) &xid, buf, sizeof(xid));
}
#ifndef MYSQL_CLIENT
bool Xid_log_event::write(IO_CACHE* file)
{
DBUG_EXECUTE_IF("do_not_write_xid", return 0;);
return write_header(file, sizeof(xid)) ||
my_b_safe_write(file, (uchar*) &xid, sizeof(xid));
}
#endif
#ifdef MYSQL_CLIENT
void Xid_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
{
Write_on_release_cache cache(&print_event_info->head_cache, file,
Write_on_release_cache::FLUSH_F);
if (!print_event_info->short_form)
{
char buf[64];
longlong10_to_str(xid, buf, 10);
print_header(&cache, print_event_info, FALSE);
my_b_printf(&cache, "\tXid = %s\n", buf);
}
my_b_printf(&cache, "COMMIT%s\n", print_event_info->delimiter);
}
#endif /* MYSQL_CLIENT */
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int Xid_log_event::do_apply_event(Relay_log_info const *rli)
{
/* For a slave Xid_log_event is COMMIT */
general_log_print(thd, COM_QUERY,
"COMMIT /* implicit, from Xid_log_event */");
return end_trans(thd, COMMIT);
}
Log_event::enum_skip_reason
Xid_log_event::do_shall_skip(Relay_log_info *rli)
{
DBUG_ENTER("Xid_log_event::do_shall_skip");
if (rli->slave_skip_counter > 0) {
thd->options&= ~OPTION_BEGIN;
DBUG_RETURN(Log_event::EVENT_SKIP_COUNT);
}
DBUG_RETURN(Log_event::do_shall_skip(rli));
}
#endif /* !MYSQL_CLIENT */
/**************************************************************************
User_var_log_event methods
**************************************************************************/
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void User_var_log_event::pack_info(Protocol* protocol)
{
char *buf= 0;
uint val_offset= 4 + name_len;
uint event_len= val_offset;
if (is_null)
{
if (!(buf= (char*) my_malloc(val_offset + 5, MYF(MY_WME))))
return;
strmov(buf + val_offset, "NULL");
event_len= val_offset + 4;
}
else
{
switch (type) {
case REAL_RESULT:
double real_val;
float8get(real_val, val);
if (!(buf= (char*) my_malloc(val_offset + FLOATING_POINT_BUFFER,
MYF(MY_WME))))
return;
event_len+= sprintf(buf + val_offset, "%.14g", real_val);
break;
case INT_RESULT:
if (!(buf= (char*) my_malloc(val_offset + 22, MYF(MY_WME))))
return;
event_len= longlong10_to_str(uint8korr(val), buf + val_offset,-10)-buf;
break;
case DECIMAL_RESULT:
{
if (!(buf= (char*) my_malloc(val_offset + DECIMAL_MAX_STR_LENGTH,
MYF(MY_WME))))
return;
String str(buf+val_offset, DECIMAL_MAX_STR_LENGTH, &my_charset_bin);
my_decimal dec;
binary2my_decimal(E_DEC_FATAL_ERROR, (uchar*) (val+2), &dec, val[0],
val[1]);
my_decimal2string(E_DEC_FATAL_ERROR, &dec, 0, 0, 0, &str);
event_len= str.length() + val_offset;
break;
}
case STRING_RESULT:
/* 15 is for 'COLLATE' and other chars */
buf= (char*) my_malloc(event_len+val_len*2+1+2*MY_CS_NAME_SIZE+15,
MYF(MY_WME));
CHARSET_INFO *cs;
if (!buf)
return;
if (!(cs= get_charset(charset_number, MYF(0))))
{
strmov(buf+val_offset, "???");
event_len+= 3;
}
else
{
char *p= strxmov(buf + val_offset, "_", cs->csname, " ", NullS);
p= str_to_hex(p, val, val_len);
p= strxmov(p, " COLLATE ", cs->name, NullS);
event_len= p-buf;
}
break;
case ROW_RESULT:
default:
DBUG_ASSERT(1);
return;
}
}
buf[0]= '@';
buf[1]= '`';
memcpy(buf+2, name, name_len);
buf[2+name_len]= '`';
buf[3+name_len]= '=';
protocol->store(buf, event_len, &my_charset_bin);
my_free(buf, MYF(0));
}
#endif /* !MYSQL_CLIENT */
User_var_log_event::
User_var_log_event(const char* buf,
const Format_description_log_event* description_event)
:Log_event(buf, description_event)
{
/* The Post-Header is empty. The Variable Data part begins immediately. */
buf+= description_event->common_header_len +
description_event->post_header_len[USER_VAR_EVENT-1];
name_len= uint4korr(buf);
name= (char *) buf + UV_NAME_LEN_SIZE;
buf+= UV_NAME_LEN_SIZE + name_len;
is_null= (bool) *buf;
if (is_null)
{
type= STRING_RESULT;
charset_number= my_charset_bin.number;
val_len= 0;
val= 0;
}
else
{
type= (Item_result) buf[UV_VAL_IS_NULL];
charset_number= uint4korr(buf + UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE);
val_len= uint4korr(buf + UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE +
UV_CHARSET_NUMBER_SIZE);
val= (char *) (buf + UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE +
UV_CHARSET_NUMBER_SIZE + UV_VAL_LEN_SIZE);
}
}
#ifndef MYSQL_CLIENT
bool User_var_log_event::write(IO_CACHE* file)
{
char buf[UV_NAME_LEN_SIZE];
char buf1[UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE +
UV_CHARSET_NUMBER_SIZE + UV_VAL_LEN_SIZE];
uchar buf2[max(8, DECIMAL_MAX_FIELD_SIZE + 2)], *pos= buf2;
uint buf1_length;
ulong event_length;
int4store(buf, name_len);
if ((buf1[0]= is_null))
{
buf1_length= 1;
val_len= 0; // Length of 'pos'
}
else
{
buf1[1]= type;
int4store(buf1 + 2, charset_number);
switch (type) {
case REAL_RESULT:
float8store(buf2, *(double*) val);
break;
case INT_RESULT:
int8store(buf2, *(longlong*) val);
break;
case DECIMAL_RESULT:
{
my_decimal *dec= (my_decimal *)val;
dec->fix_buffer_pointer();
buf2[0]= (char)(dec->intg + dec->frac);
buf2[1]= (char)dec->frac;
decimal2bin((decimal_t*)val, buf2+2, buf2[0], buf2[1]);
val_len= decimal_bin_size(buf2[0], buf2[1]) + 2;
break;
}
case STRING_RESULT:
pos= (uchar*) val;
break;
case ROW_RESULT:
default:
DBUG_ASSERT(1);
return 0;
}
int4store(buf1 + 2 + UV_CHARSET_NUMBER_SIZE, val_len);
buf1_length= 10;
}
/* Length of the whole event */
event_length= sizeof(buf)+ name_len + buf1_length + val_len;
return (write_header(file, event_length) ||
my_b_safe_write(file, (uchar*) buf, sizeof(buf)) ||
my_b_safe_write(file, (uchar*) name, name_len) ||
my_b_safe_write(file, (uchar*) buf1, buf1_length) ||
my_b_safe_write(file, pos, val_len));
}
#endif
/*
User_var_log_event::print()
*/
#ifdef MYSQL_CLIENT
void User_var_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
{
Write_on_release_cache cache(&print_event_info->head_cache, file,
Write_on_release_cache::FLUSH_F);
if (!print_event_info->short_form)
{
print_header(&cache, print_event_info, FALSE);
my_b_printf(&cache, "\tUser_var\n");
}
my_b_printf(&cache, "SET @`");
my_b_write(&cache, (uchar*) name, (uint) (name_len));
my_b_printf(&cache, "`");
if (is_null)
{
my_b_printf(&cache, ":=NULL%s\n", print_event_info->delimiter);
}
else
{
switch (type) {
case REAL_RESULT:
double real_val;
char real_buf[FMT_G_BUFSIZE(14)];
float8get(real_val, val);
sprintf(real_buf, "%.14g", real_val);
my_b_printf(&cache, ":=%s%s\n", real_buf, print_event_info->delimiter);
break;
case INT_RESULT:
char int_buf[22];
longlong10_to_str(uint8korr(val), int_buf, -10);
my_b_printf(&cache, ":=%s%s\n", int_buf, print_event_info->delimiter);
break;
case DECIMAL_RESULT:
{
char str_buf[200];
int str_len= sizeof(str_buf) - 1;
int precision= (int)val[0];
int scale= (int)val[1];
decimal_digit_t dec_buf[10];
decimal_t dec;
dec.len= 10;
dec.buf= dec_buf;
bin2decimal((uchar*) val+2, &dec, precision, scale);
decimal2string(&dec, str_buf, &str_len, 0, 0, 0);
str_buf[str_len]= 0;
my_b_printf(&cache, ":=%s%s\n", str_buf, print_event_info->delimiter);
break;
}
case STRING_RESULT:
{
/*
Let's express the string in hex. That's the most robust way. If we
print it in character form instead, we need to escape it with
character_set_client which we don't know (we will know it in 5.0, but
in 4.1 we don't know it easily when we are printing
User_var_log_event). Explanation why we would need to bother with
character_set_client (quoting Bar):
> Note, the parser doesn't switch to another unescaping mode after
> it has met a character set introducer.
> For example, if an SJIS client says something like:
> SET @a= _ucs2 \0a\0b'
> the string constant is still unescaped according to SJIS, not
> according to UCS2.
*/
char *hex_str;
CHARSET_INFO *cs;
if (!(hex_str= (char *)my_alloca(2*val_len+1+2))) // 2 hex digits / byte
break; // no error, as we are 'void'
str_to_hex(hex_str, val, val_len);
/*
For proper behaviour when mysqlbinlog|mysql, we need to explicitely
specify the variable's collation. It will however cause problems when
people want to mysqlbinlog|mysql into another server not supporting the
character set. But there's not much to do about this and it's unlikely.
*/
if (!(cs= get_charset(charset_number, MYF(0))))
/*
Generate an unusable command (=> syntax error) is probably the best
thing we can do here.
*/
my_b_printf(&cache, ":=???%s\n", print_event_info->delimiter);
else
my_b_printf(&cache, ":=_%s %s COLLATE `%s`%s\n",
cs->csname, hex_str, cs->name,
print_event_info->delimiter);
my_afree(hex_str);
}
break;
case ROW_RESULT:
default:
DBUG_ASSERT(1);
return;
}
}
}
#endif
/*
User_var_log_event::do_apply_event()
*/
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int User_var_log_event::do_apply_event(Relay_log_info const *rli)
{
Item *it= 0;
CHARSET_INFO *charset;
if (!(charset= get_charset(charset_number, MYF(MY_WME))))
return 1;
LEX_STRING user_var_name;
user_var_name.str= name;
user_var_name.length= name_len;
double real_val;
longlong int_val;
/*
We are now in a statement until the associated query log event has
been processed.
*/
const_cast<Relay_log_info*>(rli)->set_flag(Relay_log_info::IN_STMT);
if (is_null)
{
it= new Item_null();
}
else
{
switch (type) {
case REAL_RESULT:
float8get(real_val, val);
it= new Item_float(real_val, 0);
val= (char*) &real_val; // Pointer to value in native format
val_len= 8;
break;
case INT_RESULT:
int_val= (longlong) uint8korr(val);
it= new Item_int(int_val);
val= (char*) &int_val; // Pointer to value in native format
val_len= 8;
break;
case DECIMAL_RESULT:
{
Item_decimal *dec= new Item_decimal((uchar*) val+2, val[0], val[1]);
it= dec;
val= (char *)dec->val_decimal(NULL);
val_len= sizeof(my_decimal);
break;
}
case STRING_RESULT:
it= new Item_string(val, val_len, charset);
break;
case ROW_RESULT:
default:
DBUG_ASSERT(1);
return 0;
}
}
Item_func_set_user_var e(user_var_name, it);
/*
Item_func_set_user_var can't substitute something else on its place =>
0 can be passed as last argument (reference on item)
Fix_fields() can fail, in which case a call of update_hash() might
crash the server, so if fix fields fails, we just return with an
error.
*/
if (e.fix_fields(thd, 0))
return 1;
/*
A variable can just be considered as a table with
a single record and with a single column. Thus, like
a column value, it could always have IMPLICIT derivation.
*/
e.update_hash(val, val_len, type, charset, DERIVATION_IMPLICIT, 0);
free_root(thd->mem_root,0);
return 0;
}
int User_var_log_event::do_update_pos(Relay_log_info *rli)
{
rli->inc_event_relay_log_pos();
return 0;
}
Log_event::enum_skip_reason
User_var_log_event::do_shall_skip(Relay_log_info *rli)
{
/*
It is a common error to set the slave skip counter to 1 instead
of 2 when recovering from an insert which used a auto increment,
rand, or user var. Therefore, if the slave skip counter is 1, we
just say that this event should be skipped by ignoring it, meaning
that we do not change the value of the slave skip counter since it
will be decreased by the following insert event.
*/
return continue_group(rli);
}
#endif /* !MYSQL_CLIENT */
/**************************************************************************
Slave_log_event methods
**************************************************************************/
#ifdef HAVE_REPLICATION
#ifdef MYSQL_CLIENT
void Unknown_log_event::print(FILE* file_arg, PRINT_EVENT_INFO* print_event_info)
{
Write_on_release_cache cache(&print_event_info->head_cache, file_arg);
if (print_event_info->short_form)
return;
print_header(&cache, print_event_info, FALSE);
my_b_printf(&cache, "\n# %s", "Unknown event\n");
}
#endif
#ifndef MYSQL_CLIENT
void Slave_log_event::pack_info(Protocol *protocol)
{
char buf[256+HOSTNAME_LENGTH], *pos;
pos= strmov(buf, "host=");
pos= strnmov(pos, master_host, HOSTNAME_LENGTH);
pos= strmov(pos, ",port=");
pos= int10_to_str((long) master_port, pos, 10);
pos= strmov(pos, ",log=");
pos= strmov(pos, master_log);
pos= strmov(pos, ",pos=");
pos= longlong10_to_str(master_pos, pos, 10);
protocol->store(buf, pos-buf, &my_charset_bin);
}
#endif /* !MYSQL_CLIENT */
#ifndef MYSQL_CLIENT
/**
@todo
re-write this better without holding both locks at the same time
*/
Slave_log_event::Slave_log_event(THD* thd_arg,
Relay_log_info* rli)
:Log_event(thd_arg, 0, 0) , mem_pool(0), master_host(0)
{
DBUG_ENTER("Slave_log_event");
if (!rli->inited) // QQ When can this happen ?
DBUG_VOID_RETURN;
Master_info* mi = rli->mi;
// TODO: re-write this better without holding both locks at the same time
pthread_mutex_lock(&mi->data_lock);
pthread_mutex_lock(&rli->data_lock);
master_host_len = strlen(mi->host);
master_log_len = strlen(rli->group_master_log_name);
// on OOM, just do not initialize the structure and print the error
if ((mem_pool = (char*)my_malloc(get_data_size() + 1,
MYF(MY_WME))))
{
master_host = mem_pool + SL_MASTER_HOST_OFFSET ;
memcpy(master_host, mi->host, master_host_len + 1);
master_log = master_host + master_host_len + 1;
memcpy(master_log, rli->group_master_log_name, master_log_len + 1);
master_port = mi->port;
master_pos = rli->group_master_log_pos;
DBUG_PRINT("info", ("master_log: %s pos: %lu", master_log,
(ulong) master_pos));
}
else
sql_print_error("Out of memory while recording slave event");
pthread_mutex_unlock(&rli->data_lock);
pthread_mutex_unlock(&mi->data_lock);
DBUG_VOID_RETURN;
}
#endif /* !MYSQL_CLIENT */
Slave_log_event::~Slave_log_event()
{
my_free(mem_pool, MYF(MY_ALLOW_ZERO_PTR));
}
#ifdef MYSQL_CLIENT
void Slave_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
{
Write_on_release_cache cache(&print_event_info->head_cache, file);
char llbuff[22];
if (print_event_info->short_form)
return;
print_header(&cache, print_event_info, FALSE);
my_b_printf(&cache, "\n\
Slave: master_host: '%s' master_port: %d master_log: '%s' master_pos: %s\n",
master_host, master_port, master_log, llstr(master_pos, llbuff));
}
#endif /* MYSQL_CLIENT */
int Slave_log_event::get_data_size()
{
return master_host_len + master_log_len + 1 + SL_MASTER_HOST_OFFSET;
}
#ifndef MYSQL_CLIENT
bool Slave_log_event::write(IO_CACHE* file)
{
ulong event_length= get_data_size();
int8store(mem_pool + SL_MASTER_POS_OFFSET, master_pos);
int2store(mem_pool + SL_MASTER_PORT_OFFSET, master_port);
// log and host are already there
return (write_header(file, event_length) ||
my_b_safe_write(file, (uchar*) mem_pool, event_length));
}
#endif
void Slave_log_event::init_from_mem_pool(int data_size)
{
master_pos = uint8korr(mem_pool + SL_MASTER_POS_OFFSET);
master_port = uint2korr(mem_pool + SL_MASTER_PORT_OFFSET);
master_host = mem_pool + SL_MASTER_HOST_OFFSET;
master_host_len = (uint) strlen(master_host);
// safety
master_log = master_host + master_host_len + 1;
if (master_log > mem_pool + data_size)
{
master_host = 0;
return;
}
master_log_len = (uint) strlen(master_log);
}
/** This code is not used, so has not been updated to be format-tolerant. */
/* We are using description_event so that slave does not crash on Log_event
constructor */
Slave_log_event::Slave_log_event(const char* buf,
uint event_len,
const Format_description_log_event* description_event)
:Log_event(buf,description_event),mem_pool(0),master_host(0)
{
if (event_len < LOG_EVENT_HEADER_LEN)
return;
event_len -= LOG_EVENT_HEADER_LEN;
if (!(mem_pool = (char*) my_malloc(event_len + 1, MYF(MY_WME))))
return;
memcpy(mem_pool, buf + LOG_EVENT_HEADER_LEN, event_len);
mem_pool[event_len] = 0;
init_from_mem_pool(event_len);
}
#ifndef MYSQL_CLIENT
int Slave_log_event::do_apply_event(Relay_log_info const *rli)
{
if (mysql_bin_log.is_open())
return mysql_bin_log.write(this);
return 0;
}
#endif /* !MYSQL_CLIENT */
/**************************************************************************
Stop_log_event methods
**************************************************************************/
/*
Stop_log_event::print()
*/
#ifdef MYSQL_CLIENT
void Stop_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
{
Write_on_release_cache cache(&print_event_info->head_cache, file,
Write_on_release_cache::FLUSH_F);
if (print_event_info->short_form)
return;
print_header(&cache, print_event_info, FALSE);
my_b_printf(&cache, "\tStop\n");
}
#endif /* MYSQL_CLIENT */
#ifndef MYSQL_CLIENT
/*
The master stopped. We used to clean up all temporary tables but
this is useless as, as the master has shut down properly, it has
written all DROP TEMPORARY TABLE (prepared statements' deletion is
TODO only when we binlog prep stmts). We used to clean up
slave_load_tmpdir, but this is useless as it has been cleared at the
end of LOAD DATA INFILE. So we have nothing to do here. The place
were we must do this cleaning is in
Start_log_event_v3::do_apply_event(), not here. Because if we come
here, the master was sane.
*/
int Stop_log_event::do_update_pos(Relay_log_info *rli)
{
/*
We do not want to update master_log pos because we get a rotate event
before stop, so by now group_master_log_name is set to the next log.
If we updated it, we will have incorrect master coordinates and this
could give false triggers in MASTER_POS_WAIT() that we have reached
the target position when in fact we have not.
*/
if (thd->options & OPTION_BEGIN)
rli->inc_event_relay_log_pos();
else
{
rli->inc_group_relay_log_pos(0);
flush_relay_log_info(rli);
}
return 0;
}
#endif /* !MYSQL_CLIENT */
#endif /* HAVE_REPLICATION */
/**************************************************************************
Create_file_log_event methods
**************************************************************************/
/*
Create_file_log_event ctor
*/
#ifndef MYSQL_CLIENT
Create_file_log_event::
Create_file_log_event(THD* thd_arg, sql_exchange* ex,
const char* db_arg, const char* table_name_arg,
List<Item>& fields_arg, enum enum_duplicates handle_dup,
bool ignore,
uchar* block_arg, uint block_len_arg, bool using_trans)
:Load_log_event(thd_arg,ex,db_arg,table_name_arg,fields_arg,handle_dup, ignore,
using_trans),
fake_base(0), block(block_arg), event_buf(0), block_len(block_len_arg),
file_id(thd_arg->file_id = mysql_bin_log.next_file_id())
{
DBUG_ENTER("Create_file_log_event");
sql_ex.force_new_format();
DBUG_VOID_RETURN;
}
/*
Create_file_log_event::write_data_body()
*/
bool Create_file_log_event::write_data_body(IO_CACHE* file)
{
bool res;
if ((res= Load_log_event::write_data_body(file)) || fake_base)
return res;
return (my_b_safe_write(file, (uchar*) "", 1) ||
my_b_safe_write(file, (uchar*) block, block_len));
}
/*
Create_file_log_event::write_data_header()
*/
bool Create_file_log_event::write_data_header(IO_CACHE* file)
{
bool res;
uchar buf[CREATE_FILE_HEADER_LEN];
if ((res= Load_log_event::write_data_header(file)) || fake_base)
return res;
int4store(buf + CF_FILE_ID_OFFSET, file_id);
return my_b_safe_write(file, buf, CREATE_FILE_HEADER_LEN) != 0;
}
/*
Create_file_log_event::write_base()
*/
bool Create_file_log_event::write_base(IO_CACHE* file)
{
bool res;
fake_base= 1; // pretend we are Load event
res= write(file);
fake_base= 0;
return res;
}
#endif /* !MYSQL_CLIENT */
/*
Create_file_log_event ctor
*/
Create_file_log_event::Create_file_log_event(const char* buf, uint len,
const Format_description_log_event* description_event)
:Load_log_event(buf,0,description_event),fake_base(0),block(0),inited_from_old(0)
{
DBUG_ENTER("Create_file_log_event::Create_file_log_event(char*,...)");
uint block_offset;
uint header_len= description_event->common_header_len;
uint8 load_header_len= description_event->post_header_len[LOAD_EVENT-1];
uint8 create_file_header_len= description_event->post_header_len[CREATE_FILE_EVENT-1];
if (!(event_buf= (char*) my_memdup(buf, len, MYF(MY_WME))) ||
copy_log_event(event_buf,len,
((buf[EVENT_TYPE_OFFSET] == LOAD_EVENT) ?
load_header_len + header_len :
(fake_base ? (header_len+load_header_len) :
(header_len+load_header_len) +
create_file_header_len)),
description_event))
DBUG_VOID_RETURN;
if (description_event->binlog_version!=1)
{
file_id= uint4korr(buf +
header_len +
load_header_len + CF_FILE_ID_OFFSET);
/*
Note that it's ok to use get_data_size() below, because it is computed
with values we have already read from this event (because we called
copy_log_event()); we are not using slave's format info to decode
master's format, we are really using master's format info.
Anyway, both formats should be identical (except the common_header_len)
as these Load events are not changed between 4.0 and 5.0 (as logging of
LOAD DATA INFILE does not use Load_log_event in 5.0).
The + 1 is for \0 terminating fname
*/
block_offset= (description_event->common_header_len +
Load_log_event::get_data_size() +
create_file_header_len + 1);
if (len < block_offset)
DBUG_VOID_RETURN;
block = (uchar*)buf + block_offset;
block_len = len - block_offset;
}
else
{
sql_ex.force_new_format();
inited_from_old = 1;
}
DBUG_VOID_RETURN;
}
/*
Create_file_log_event::print()
*/
#ifdef MYSQL_CLIENT
void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info,
bool enable_local)
{
Write_on_release_cache cache(&print_event_info->head_cache, file);
if (print_event_info->short_form)
{
if (enable_local && check_fname_outside_temp_buf())
Load_log_event::print(file, print_event_info);
return;
}
if (enable_local)
{
Load_log_event::print(file, print_event_info,
!check_fname_outside_temp_buf());
/*
That one is for "file_id: etc" below: in mysqlbinlog we want the #, in
SHOW BINLOG EVENTS we don't.
*/
my_b_printf(&cache, "#");
}
my_b_printf(&cache, " file_id: %d block_len: %d\n", file_id, block_len);
}
void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
{
print(file, print_event_info, 0);
}
#endif /* MYSQL_CLIENT */
/*
Create_file_log_event::pack_info()
*/
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Create_file_log_event::pack_info(Protocol *protocol)
{
char buf[NAME_LEN*2 + 30 + 21*2], *pos;
pos= strmov(buf, "db=");
memcpy(pos, db, db_len);
pos= strmov(pos + db_len, ";table=");
memcpy(pos, table_name, table_name_len);
pos= strmov(pos + table_name_len, ";file_id=");
pos= int10_to_str((long) file_id, pos, 10);
pos= strmov(pos, ";block_len=");
pos= int10_to_str((long) block_len, pos, 10);
protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
}
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
/**
Create_file_log_event::do_apply_event()
Constructor for Create_file_log_event to intantiate an event
from the relay log on the slave.
@retval
0 Success
@retval
1 Failure
*/
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int Create_file_log_event::do_apply_event(Relay_log_info const *rli)
{
char proc_info[17+FN_REFLEN+10], *fname_buf;
char *ext;
int fd = -1;
IO_CACHE file;
int error = 1;
bzero((char*)&file, sizeof(file));
fname_buf= strmov(proc_info, "Making temp file ");
ext= slave_load_file_stem(fname_buf, file_id, server_id, ".info");
thd_proc_info(thd, proc_info);
my_delete(fname_buf, MYF(0)); // old copy may exist already
if ((fd= my_create(fname_buf, CREATE_MODE,
O_WRONLY | O_BINARY | O_EXCL | O_NOFOLLOW,
MYF(MY_WME))) < 0 ||
init_io_cache(&file, fd, IO_SIZE, WRITE_CACHE, (my_off_t)0, 0,
MYF(MY_WME|MY_NABP)))
{
rli->report(ERROR_LEVEL, my_errno,
"Error in Create_file event: could not open file '%s'",
fname_buf);
goto err;
}
// a trick to avoid allocating another buffer
fname= fname_buf;
fname_len= (uint) (strmov(ext, ".data") - fname);
if (write_base(&file))
{
strmov(ext, ".info"); // to have it right in the error message
rli->report(ERROR_LEVEL, my_errno,
"Error in Create_file event: could not write to file '%s'",
fname_buf);
goto err;
}
end_io_cache(&file);
my_close(fd, MYF(0));
// fname_buf now already has .data, not .info, because we did our trick
my_delete(fname_buf, MYF(0)); // old copy may exist already
if ((fd= my_create(fname_buf, CREATE_MODE,
O_WRONLY | O_BINARY | O_EXCL | O_NOFOLLOW,
MYF(MY_WME))) < 0)
{
rli->report(ERROR_LEVEL, my_errno,
"Error in Create_file event: could not open file '%s'",
fname_buf);
goto err;
}
if (my_write(fd, (uchar*) block, block_len, MYF(MY_WME+MY_NABP)))
{
rli->report(ERROR_LEVEL, my_errno,
"Error in Create_file event: write to '%s' failed",
fname_buf);
goto err;
}
error=0; // Everything is ok
err:
if (error)
end_io_cache(&file);
if (fd >= 0)
my_close(fd, MYF(0));
thd_proc_info(thd, 0);
return error != 0;
}
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
/**************************************************************************
Append_block_log_event methods
**************************************************************************/
/*
Append_block_log_event ctor
*/
#ifndef MYSQL_CLIENT
Append_block_log_event::Append_block_log_event(THD *thd_arg,
const char *db_arg,
uchar *block_arg,
uint block_len_arg,
bool using_trans)
:Log_event(thd_arg,0, using_trans), block(block_arg),
block_len(block_len_arg), file_id(thd_arg->file_id), db(db_arg)
{
}
#endif
/*
Append_block_log_event ctor
*/
Append_block_log_event::Append_block_log_event(const char* buf, uint len,
const Format_description_log_event* description_event)
:Log_event(buf, description_event),block(0)
{
DBUG_ENTER("Append_block_log_event::Append_block_log_event(char*,...)");
uint8 common_header_len= description_event->common_header_len;
uint8 append_block_header_len=
description_event->post_header_len[APPEND_BLOCK_EVENT-1];
uint total_header_len= common_header_len+append_block_header_len;
if (len < total_header_len)
DBUG_VOID_RETURN;
file_id= uint4korr(buf + common_header_len + AB_FILE_ID_OFFSET);
block= (uchar*)buf + total_header_len;
block_len= len - total_header_len;
DBUG_VOID_RETURN;
}
/*
Append_block_log_event::write()
*/
#ifndef MYSQL_CLIENT
bool Append_block_log_event::write(IO_CACHE* file)
{
uchar buf[APPEND_BLOCK_HEADER_LEN];
int4store(buf + AB_FILE_ID_OFFSET, file_id);
return (write_header(file, APPEND_BLOCK_HEADER_LEN + block_len) ||
my_b_safe_write(file, buf, APPEND_BLOCK_HEADER_LEN) ||
my_b_safe_write(file, (uchar*) block, block_len));
}
#endif
/*
Append_block_log_event::print()
*/
#ifdef MYSQL_CLIENT
void Append_block_log_event::print(FILE* file,
PRINT_EVENT_INFO* print_event_info)
{
Write_on_release_cache cache(&print_event_info->head_cache, file);
if (print_event_info->short_form)
return;
print_header(&cache, print_event_info, FALSE);
my_b_printf(&cache, "\n#%s: file_id: %d block_len: %d\n",
get_type_str(), file_id, block_len);
}
#endif /* MYSQL_CLIENT */
/*
Append_block_log_event::pack_info()
*/
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Append_block_log_event::pack_info(Protocol *protocol)
{
char buf[256];
size_t length;
length= my_snprintf(buf, sizeof(buf), ";file_id=%u;block_len=%u",
file_id, block_len);
protocol->store(buf, length, &my_charset_bin);
}
/*
Append_block_log_event::get_create_or_append()
*/
int Append_block_log_event::get_create_or_append() const
{
return 0; /* append to the file, fail if not exists */
}
/*
Append_block_log_event::do_apply_event()
*/
int Append_block_log_event::do_apply_event(Relay_log_info const *rli)
{
char proc_info[17+FN_REFLEN+10], *fname= proc_info+17;
int fd;
int error = 1;
DBUG_ENTER("Append_block_log_event::do_apply_event");
fname= strmov(proc_info, "Making temp file ");
slave_load_file_stem(fname, file_id, server_id, ".data");
thd_proc_info(thd, proc_info);
if (get_create_or_append())
{
/*
Usually lex_start() is called by mysql_parse(), but we need it here
as the present method does not call mysql_parse().
*/
lex_start(thd);
mysql_reset_thd_for_next_command(thd);
my_delete(fname, MYF(0)); // old copy may exist already
if ((fd= my_create(fname, CREATE_MODE,
O_WRONLY | O_BINARY | O_EXCL | O_NOFOLLOW,
MYF(MY_WME))) < 0)
{
rli->report(ERROR_LEVEL, my_errno,
"Error in %s event: could not create file '%s'",
get_type_str(), fname);
goto err;
}
}
else if ((fd = my_open(fname, O_WRONLY | O_APPEND | O_BINARY | O_NOFOLLOW,
MYF(MY_WME))) < 0)
{
rli->report(ERROR_LEVEL, my_errno,
"Error in %s event: could not open file '%s'",
get_type_str(), fname);
goto err;
}
DBUG_EXECUTE_IF("remove_slave_load_file_before_write",
my_close(fd,MYF(0)); fd= -1; my_delete(fname, MYF(0)););
if (my_write(fd, (uchar*) block, block_len, MYF(MY_WME+MY_NABP)))
{
rli->report(ERROR_LEVEL, my_errno,
"Error in %s event: write to '%s' failed",
get_type_str(), fname);
goto err;
}
error=0;
err:
if (fd >= 0)
my_close(fd, MYF(0));
thd_proc_info(thd, 0);
DBUG_RETURN(error);
}
#endif
/**************************************************************************
Delete_file_log_event methods
**************************************************************************/
/*
Delete_file_log_event ctor
*/
#ifndef MYSQL_CLIENT
Delete_file_log_event::Delete_file_log_event(THD *thd_arg, const char* db_arg,
bool using_trans)
:Log_event(thd_arg, 0, using_trans), file_id(thd_arg->file_id), db(db_arg)
{
}
#endif
/*
Delete_file_log_event ctor
*/
Delete_file_log_event::Delete_file_log_event(const char* buf, uint len,
const Format_description_log_event* description_event)
:Log_event(buf, description_event),file_id(0)
{
uint8 common_header_len= description_event->common_header_len;
uint8 delete_file_header_len= description_event->post_header_len[DELETE_FILE_EVENT-1];
if (len < (uint)(common_header_len + delete_file_header_len))
return;
file_id= uint4korr(buf + common_header_len + DF_FILE_ID_OFFSET);
}
/*
Delete_file_log_event::write()
*/
#ifndef MYSQL_CLIENT
bool Delete_file_log_event::write(IO_CACHE* file)
{
uchar buf[DELETE_FILE_HEADER_LEN];
int4store(buf + DF_FILE_ID_OFFSET, file_id);
return (write_header(file, sizeof(buf)) ||
my_b_safe_write(file, buf, sizeof(buf)));
}
#endif
/*
Delete_file_log_event::print()
*/
#ifdef MYSQL_CLIENT
void Delete_file_log_event::print(FILE* file,
PRINT_EVENT_INFO* print_event_info)
{
Write_on_release_cache cache(&print_event_info->head_cache, file);
if (print_event_info->short_form)
return;
print_header(&cache, print_event_info, FALSE);
my_b_printf(&cache, "\n#Delete_file: file_id=%u\n", file_id);
}
#endif /* MYSQL_CLIENT */
/*
Delete_file_log_event::pack_info()
*/
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Delete_file_log_event::pack_info(Protocol *protocol)
{
char buf[64];
size_t length;
length= my_snprintf(buf, sizeof(buf), ";file_id=%u", (uint) file_id);
protocol->store(buf, length, &my_charset_bin);
}
#endif
/*
Delete_file_log_event::do_apply_event()
*/
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int Delete_file_log_event::do_apply_event(Relay_log_info const *rli)
{
char fname[FN_REFLEN+10];
char *ext= slave_load_file_stem(fname, file_id, server_id, ".data");
(void) my_delete(fname, MYF(MY_WME));
strmov(ext, ".info");
(void) my_delete(fname, MYF(MY_WME));
return 0;
}
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
/**************************************************************************
Execute_load_log_event methods
**************************************************************************/
/*
Execute_load_log_event ctor
*/
#ifndef MYSQL_CLIENT
Execute_load_log_event::Execute_load_log_event(THD *thd_arg,
const char* db_arg,
bool using_trans)
:Log_event(thd_arg, 0, using_trans), file_id(thd_arg->file_id), db(db_arg)
{
}
#endif
/*
Execute_load_log_event ctor
*/
Execute_load_log_event::Execute_load_log_event(const char* buf, uint len,
const Format_description_log_event* description_event)
:Log_event(buf, description_event), file_id(0)
{
uint8 common_header_len= description_event->common_header_len;
uint8 exec_load_header_len= description_event->post_header_len[EXEC_LOAD_EVENT-1];
if (len < (uint)(common_header_len+exec_load_header_len))
return;
file_id= uint4korr(buf + common_header_len + EL_FILE_ID_OFFSET);
}
/*
Execute_load_log_event::write()
*/
#ifndef MYSQL_CLIENT
bool Execute_load_log_event::write(IO_CACHE* file)
{
uchar buf[EXEC_LOAD_HEADER_LEN];
int4store(buf + EL_FILE_ID_OFFSET, file_id);
return (write_header(file, sizeof(buf)) ||
my_b_safe_write(file, buf, sizeof(buf)));
}
#endif
/*
Execute_load_log_event::print()
*/
#ifdef MYSQL_CLIENT
void Execute_load_log_event::print(FILE* file,
PRINT_EVENT_INFO* print_event_info)
{
Write_on_release_cache cache(&print_event_info->head_cache, file);
if (print_event_info->short_form)
return;
print_header(&cache, print_event_info, FALSE);
my_b_printf(&cache, "\n#Exec_load: file_id=%d\n",
file_id);
}
#endif
/*
Execute_load_log_event::pack_info()
*/
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Execute_load_log_event::pack_info(Protocol *protocol)
{
char buf[64];
size_t length;
length= my_snprintf(buf, sizeof(buf), ";file_id=%u", (uint) file_id);
protocol->store(buf, length, &my_charset_bin);
}
/*
Execute_load_log_event::do_apply_event()
*/
int Execute_load_log_event::do_apply_event(Relay_log_info const *rli)
{
char fname[FN_REFLEN+10];
char *ext;
int fd;
int error= 1;
IO_CACHE file;
Load_log_event *lev= 0;
ext= slave_load_file_stem(fname, file_id, server_id, ".info");
if ((fd = my_open(fname, O_RDONLY | O_BINARY | O_NOFOLLOW,
MYF(MY_WME))) < 0 ||
init_io_cache(&file, fd, IO_SIZE, READ_CACHE, (my_off_t)0, 0,
MYF(MY_WME|MY_NABP)))
{
rli->report(ERROR_LEVEL, my_errno,
"Error in Exec_load event: could not open file '%s'",
fname);
goto err;
}
if (!(lev = (Load_log_event*)Log_event::read_log_event(&file,
(pthread_mutex_t*)0,
rli->relay_log.description_event_for_exec)) ||
lev->get_type_code() != NEW_LOAD_EVENT)
{
rli->report(ERROR_LEVEL, 0, "Error in Exec_load event: "
"file '%s' appears corrupted", fname);
goto err;
}
lev->thd = thd;
/*
lev->do_apply_event should use rli only for errors i.e. should
not advance rli's position.
lev->do_apply_event is the place where the table is loaded (it
calls mysql_load()).
*/
const_cast<Relay_log_info*>(rli)->future_group_master_log_pos= log_pos;
if (lev->do_apply_event(0,rli,1))
{
/*
We want to indicate the name of the file that could not be loaded
(SQL_LOADxxx).
But as we are here we are sure the error is in rli->last_slave_error and
rli->last_slave_errno (example of error: duplicate entry for key), so we
don't want to overwrite it with the filename.
What we want instead is add the filename to the current error message.
*/
char *tmp= my_strdup(rli->last_error().message, MYF(MY_WME));
if (tmp)
{
rli->report(ERROR_LEVEL, rli->last_error().number,
"%s. Failed executing load from '%s'", tmp, fname);
my_free(tmp,MYF(0));
}
goto err;
}
/*
We have an open file descriptor to the .info file; we need to close it
or Windows will refuse to delete the file in my_delete().
*/
if (fd >= 0)
{
my_close(fd, MYF(0));
end_io_cache(&file);
fd= -1;
}
(void) my_delete(fname, MYF(MY_WME));
memcpy(ext, ".data", 6);
(void) my_delete(fname, MYF(MY_WME));
error = 0;
err:
delete lev;
if (fd >= 0)
{
my_close(fd, MYF(0));
end_io_cache(&file);
}
return error;
}
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
/**************************************************************************
Begin_load_query_log_event methods
**************************************************************************/
#ifndef MYSQL_CLIENT
Begin_load_query_log_event::
Begin_load_query_log_event(THD* thd_arg, const char* db_arg, uchar* block_arg,
uint block_len_arg, bool using_trans)
:Append_block_log_event(thd_arg, db_arg, block_arg, block_len_arg,
using_trans)
{
file_id= thd_arg->file_id= mysql_bin_log.next_file_id();
}
#endif
Begin_load_query_log_event::
Begin_load_query_log_event(const char* buf, uint len,
const Format_description_log_event* desc_event)
:Append_block_log_event(buf, len, desc_event)
{
}
#if defined( HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int Begin_load_query_log_event::get_create_or_append() const
{
return 1; /* create the file */
}
#endif /* defined( HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
Log_event::enum_skip_reason
Begin_load_query_log_event::do_shall_skip(Relay_log_info *rli)
{
/*
If the slave skip counter is 1, then we should not start executing
on the next event.
*/
return continue_group(rli);
}
#endif
/**************************************************************************
Execute_load_query_log_event methods
**************************************************************************/
#ifndef MYSQL_CLIENT
Execute_load_query_log_event::
Execute_load_query_log_event(THD *thd_arg, const char* query_arg,
ulong query_length_arg, uint fn_pos_start_arg,
uint fn_pos_end_arg,
enum_load_dup_handling dup_handling_arg,
bool using_trans, bool suppress_use,
int errcode):
Query_log_event(thd_arg, query_arg, query_length_arg, using_trans,
suppress_use, errcode),
file_id(thd_arg->file_id), fn_pos_start(fn_pos_start_arg),
fn_pos_end(fn_pos_end_arg), dup_handling(dup_handling_arg)
{
}
#endif /* !MYSQL_CLIENT */
Execute_load_query_log_event::
Execute_load_query_log_event(const char* buf, uint event_len,
const Format_description_log_event* desc_event):
Query_log_event(buf, event_len, desc_event, EXECUTE_LOAD_QUERY_EVENT),
file_id(0), fn_pos_start(0), fn_pos_end(0)
{
if (!Query_log_event::is_valid())
return;
buf+= desc_event->common_header_len;
fn_pos_start= uint4korr(buf + ELQ_FN_POS_START_OFFSET);
fn_pos_end= uint4korr(buf + ELQ_FN_POS_END_OFFSET);
dup_handling= (enum_load_dup_handling)(*(buf + ELQ_DUP_HANDLING_OFFSET));
if (fn_pos_start > q_len || fn_pos_end > q_len ||
dup_handling > LOAD_DUP_REPLACE)
return;
file_id= uint4korr(buf + ELQ_FILE_ID_OFFSET);
}
ulong Execute_load_query_log_event::get_post_header_size_for_derived()
{
return EXECUTE_LOAD_QUERY_EXTRA_HEADER_LEN;
}
#ifndef MYSQL_CLIENT
bool
Execute_load_query_log_event::write_post_header_for_derived(IO_CACHE* file)
{
uchar buf[EXECUTE_LOAD_QUERY_EXTRA_HEADER_LEN];
int4store(buf, file_id);
int4store(buf + 4, fn_pos_start);
int4store(buf + 4 + 4, fn_pos_end);
*(buf + 4 + 4 + 4)= (uchar) dup_handling;
return my_b_safe_write(file, buf, EXECUTE_LOAD_QUERY_EXTRA_HEADER_LEN);
}
#endif
#ifdef MYSQL_CLIENT
void Execute_load_query_log_event::print(FILE* file,
PRINT_EVENT_INFO* print_event_info)
{
print(file, print_event_info, 0);
}
/**
Prints the query as LOAD DATA LOCAL and with rewritten filename.
*/
void Execute_load_query_log_event::print(FILE* file,
PRINT_EVENT_INFO* print_event_info,
const char *local_fname)
{
Write_on_release_cache cache(&print_event_info->head_cache, file);
print_query_header(&cache, print_event_info);
if (local_fname)
{
my_b_write(&cache, (uchar*) query, fn_pos_start);
my_b_printf(&cache, " LOCAL INFILE \'");
my_b_printf(&cache, "%s", local_fname);
my_b_printf(&cache, "\'");
if (dup_handling == LOAD_DUP_REPLACE)
my_b_printf(&cache, " REPLACE");
my_b_printf(&cache, " INTO");
my_b_write(&cache, (uchar*) query + fn_pos_end, q_len-fn_pos_end);
my_b_printf(&cache, "\n%s\n", print_event_info->delimiter);
}
else
{
my_b_write(&cache, (uchar*) query, q_len);
my_b_printf(&cache, "\n%s\n", print_event_info->delimiter);
}
if (!print_event_info->short_form)
my_b_printf(&cache, "# file_id: %d \n", file_id);
}
#endif
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Execute_load_query_log_event::pack_info(Protocol *protocol)
{
char *buf, *pos;
if (!(buf= (char*) my_malloc(9 + db_len + q_len + 10 + 21, MYF(MY_WME))))
return;
pos= buf;
if (db && db_len)
{
pos= strmov(buf, "use `");
memcpy(pos, db, db_len);
pos= strmov(pos+db_len, "`; ");
}
if (query && q_len)
{
memcpy(pos, query, q_len);
pos+= q_len;
}
pos= strmov(pos, " ;file_id=");
pos= int10_to_str((long) file_id, pos, 10);
protocol->store(buf, pos-buf, &my_charset_bin);
my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
}
int
Execute_load_query_log_event::do_apply_event(Relay_log_info const *rli)
{
char *p;
char *buf;
char *fname;
char *fname_end;
int error;
buf= (char*) my_malloc(q_len + 1 - (fn_pos_end - fn_pos_start) +
(FN_REFLEN + 10) + 10 + 8 + 5, MYF(MY_WME));
DBUG_EXECUTE_IF("LOAD_DATA_INFILE_has_fatal_error", my_free(buf, MYF(0)); buf= NULL;);
/* Replace filename and LOCAL keyword in query before executing it */
if (buf == NULL)
{
rli->report(ERROR_LEVEL, ER_SLAVE_FATAL_ERROR,
ER(ER_SLAVE_FATAL_ERROR), "Not enough memory");
return 1;
}
p= buf;
memcpy(p, query, fn_pos_start);
p+= fn_pos_start;
fname= (p= strmake(p, STRING_WITH_LEN(" INFILE \'")));
p= slave_load_file_stem(p, file_id, server_id, ".data");
fname_end= p= strend(p); // Safer than p=p+5
*(p++)='\'';
switch (dup_handling) {
case LOAD_DUP_IGNORE:
p= strmake(p, STRING_WITH_LEN(" IGNORE"));
break;
case LOAD_DUP_REPLACE:
p= strmake(p, STRING_WITH_LEN(" REPLACE"));
break;
default:
/* Ordinary load data */
break;
}
p= strmake(p, STRING_WITH_LEN(" INTO "));
p= strmake(p, query+fn_pos_end, q_len-fn_pos_end);
error= Query_log_event::do_apply_event(rli, buf, p-buf);
/* Forging file name for deletion in same buffer */
*fname_end= 0;
/*
If there was an error the slave is going to stop, leave the
file so that we can re-execute this event at START SLAVE.
*/
if (!error)
(void) my_delete(fname, MYF(MY_WME));
my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
return error;
}
#endif
/**************************************************************************
sql_ex_info methods
**************************************************************************/
/*
sql_ex_info::write_data()
*/
bool sql_ex_info::write_data(IO_CACHE* file)
{
if (new_format())
{
return (write_str(file, field_term, (uint) field_term_len) ||
write_str(file, enclosed, (uint) enclosed_len) ||
write_str(file, line_term, (uint) line_term_len) ||
write_str(file, line_start, (uint) line_start_len) ||
write_str(file, escaped, (uint) escaped_len) ||
my_b_safe_write(file,(uchar*) &opt_flags,1));
}
else
{
/**
@todo This is sensitive to field padding. We should write a
char[7], not an old_sql_ex. /sven
*/
old_sql_ex old_ex;
old_ex.field_term= *field_term;
old_ex.enclosed= *enclosed;
old_ex.line_term= *line_term;
old_ex.line_start= *line_start;
old_ex.escaped= *escaped;
old_ex.opt_flags= opt_flags;
old_ex.empty_flags=empty_flags;
return my_b_safe_write(file, (uchar*) &old_ex, sizeof(old_ex)) != 0;
}
}
/*
sql_ex_info::init()
*/
const char *sql_ex_info::init(const char *buf, const char *buf_end,
bool use_new_format)
{
cached_new_format = use_new_format;
if (use_new_format)
{
empty_flags=0;
/*
The code below assumes that buf will not disappear from
under our feet during the lifetime of the event. This assumption
holds true in the slave thread if the log is in new format, but is not
the case when we have old format because we will be reusing net buffer
to read the actual file before we write out the Create_file event.
*/
if (read_str(&buf, buf_end, &field_term, &field_term_len) ||
read_str(&buf, buf_end, &enclosed, &enclosed_len) ||
read_str(&buf, buf_end, &line_term, &line_term_len) ||
read_str(&buf, buf_end, &line_start, &line_start_len) ||
read_str(&buf, buf_end, &escaped, &escaped_len))
return 0;
opt_flags = *buf++;
}
else
{
field_term_len= enclosed_len= line_term_len= line_start_len= escaped_len=1;
field_term = buf++; // Use first byte in string
enclosed= buf++;
line_term= buf++;
line_start= buf++;
escaped= buf++;
opt_flags = *buf++;
empty_flags= *buf++;
if (empty_flags & FIELD_TERM_EMPTY)
field_term_len=0;
if (empty_flags & ENCLOSED_EMPTY)
enclosed_len=0;
if (empty_flags & LINE_TERM_EMPTY)
line_term_len=0;
if (empty_flags & LINE_START_EMPTY)
line_start_len=0;
if (empty_flags & ESCAPED_EMPTY)
escaped_len=0;
}
return buf;
}
/**************************************************************************
Rows_log_event member functions
**************************************************************************/
#ifndef MYSQL_CLIENT
Rows_log_event::Rows_log_event(THD *thd_arg, TABLE *tbl_arg, ulong tid,
MY_BITMAP const *cols, bool is_transactional)
: Log_event(thd_arg, 0, is_transactional),
m_row_count(0),
m_table(tbl_arg),
m_table_id(tid),
m_width(tbl_arg ? tbl_arg->s->fields : 1),
m_rows_buf(0), m_rows_cur(0), m_rows_end(0), m_flags(0)
#ifdef HAVE_REPLICATION
, m_curr_row(NULL), m_curr_row_end(NULL), m_key(NULL)
#endif
{
/*
We allow a special form of dummy event when the table, and cols
are null and the table id is ~0UL. This is a temporary
solution, to be able to terminate a started statement in the
binary log: the extraneous events will be removed in the future.
*/
DBUG_ASSERT((tbl_arg && tbl_arg->s && tid != ~0UL) ||
(!tbl_arg && !cols && tid == ~0UL));
if (thd_arg->options & OPTION_NO_FOREIGN_KEY_CHECKS)
set_flags(NO_FOREIGN_KEY_CHECKS_F);
if (thd_arg->options & OPTION_RELAXED_UNIQUE_CHECKS)
set_flags(RELAXED_UNIQUE_CHECKS_F);
/* if bitmap_init fails, caught in is_valid() */
if (likely(!bitmap_init(&m_cols,
m_width <= sizeof(m_bitbuf)*8 ? m_bitbuf : NULL,
m_width,
false)))
{
/* Cols can be zero if this is a dummy binrows event */
if (likely(cols != NULL))
{
memcpy(m_cols.bitmap, cols->bitmap, no_bytes_in_map(cols));
create_last_word_mask(&m_cols);
}
}
else
{
// Needed because bitmap_init() does not set it to null on failure
m_cols.bitmap= 0;
}
}
#endif
Rows_log_event::Rows_log_event(const char *buf, uint event_len,
Log_event_type event_type,
const Format_description_log_event
*description_event)
: Log_event(buf, description_event),
m_row_count(0),
#ifndef MYSQL_CLIENT
m_table(NULL),
#endif
m_table_id(0), m_rows_buf(0), m_rows_cur(0), m_rows_end(0)
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
, m_curr_row(NULL), m_curr_row_end(NULL), m_key(NULL)
#endif
{
DBUG_ENTER("Rows_log_event::Rows_log_event(const char*,...)");
uint8 const common_header_len= description_event->common_header_len;
uint8 const post_header_len= description_event->post_header_len[event_type-1];
DBUG_PRINT("enter",("event_len: %u common_header_len: %d "
"post_header_len: %d",
event_len, common_header_len,
post_header_len));
const char *post_start= buf + common_header_len;
post_start+= RW_MAPID_OFFSET;
if (post_header_len == 6)
{
/* Master is of an intermediate source tree before 5.1.4. Id is 4 bytes */
m_table_id= uint4korr(post_start);
post_start+= 4;
}
else
{
m_table_id= (ulong) uint6korr(post_start);
post_start+= RW_FLAGS_OFFSET;
}
m_flags= uint2korr(post_start);
uchar const *const var_start=
(const uchar *)buf + common_header_len + post_header_len;
uchar const *const ptr_width= var_start;
uchar *ptr_after_width= (uchar*) ptr_width;
DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
m_width = net_field_length(&ptr_after_width);
DBUG_PRINT("debug", ("m_width=%lu", m_width));
/* if bitmap_init fails, catched in is_valid() */
if (likely(!bitmap_init(&m_cols,
m_width <= sizeof(m_bitbuf)*8 ? m_bitbuf : NULL,
m_width,
false)))
{
DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
memcpy(m_cols.bitmap, ptr_after_width, (m_width + 7) / 8);
create_last_word_mask(&m_cols);
ptr_after_width+= (m_width + 7) / 8;
DBUG_DUMP("m_cols", (uchar*) m_cols.bitmap, no_bytes_in_map(&m_cols));
}
else
{
// Needed because bitmap_init() does not set it to null on failure
m_cols.bitmap= NULL;
DBUG_VOID_RETURN;
}
m_cols_ai.bitmap= m_cols.bitmap; /* See explanation in is_valid() */
if (event_type == UPDATE_ROWS_EVENT)
{
DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
/* if bitmap_init fails, caught in is_valid() */
if (likely(!bitmap_init(&m_cols_ai,
m_width <= sizeof(m_bitbuf_ai)*8 ? m_bitbuf_ai : NULL,
m_width,
false)))
{
DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
memcpy(m_cols_ai.bitmap, ptr_after_width, (m_width + 7) / 8);
create_last_word_mask(&m_cols_ai);
ptr_after_width+= (m_width + 7) / 8;
DBUG_DUMP("m_cols_ai", (uchar*) m_cols_ai.bitmap,
no_bytes_in_map(&m_cols_ai));
}
else
{
// Needed because bitmap_init() does not set it to null on failure
m_cols_ai.bitmap= 0;
DBUG_VOID_RETURN;
}
}
const uchar* const ptr_rows_data= (const uchar*) ptr_after_width;
size_t const data_size= event_len - (ptr_rows_data - (const uchar *) buf);
DBUG_PRINT("info",("m_table_id: %lu m_flags: %d m_width: %lu data_size: %lu",
m_table_id, m_flags, m_width, (ulong) data_size));
m_rows_buf= (uchar*) my_malloc(data_size, MYF(MY_WME));
if (likely((bool)m_rows_buf))
{
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
m_curr_row= m_rows_buf;
#endif
m_rows_end= m_rows_buf + data_size;
m_rows_cur= m_rows_end;
memcpy(m_rows_buf, ptr_rows_data, data_size);
}
else
m_cols.bitmap= 0; // to not free it
DBUG_VOID_RETURN;
}
Rows_log_event::~Rows_log_event()
{
if (m_cols.bitmap == m_bitbuf) // no my_malloc happened
m_cols.bitmap= 0; // so no my_free in bitmap_free
bitmap_free(&m_cols); // To pair with bitmap_init().
my_free((uchar*)m_rows_buf, MYF(MY_ALLOW_ZERO_PTR));
}
int Rows_log_event::get_data_size()
{
int const type_code= get_type_code();
uchar buf[sizeof(m_width) + 1];
uchar *end= net_store_length(buf, m_width);
DBUG_EXECUTE_IF("old_row_based_repl_4_byte_map_id_master",
return 6 + no_bytes_in_map(&m_cols) + (end - buf) +
(type_code == UPDATE_ROWS_EVENT ? no_bytes_in_map(&m_cols_ai) : 0) +
(m_rows_cur - m_rows_buf););
int data_size= ROWS_HEADER_LEN;
data_size+= no_bytes_in_map(&m_cols);
data_size+= (uint) (end - buf);
if (type_code == UPDATE_ROWS_EVENT)
data_size+= no_bytes_in_map(&m_cols_ai);
data_size+= (uint) (m_rows_cur - m_rows_buf);
return data_size;
}
#ifndef MYSQL_CLIENT
int Rows_log_event::do_add_row_data(uchar *row_data, size_t length)
{
/*
When the table has a primary key, we would probably want, by default, to
log only the primary key value instead of the entire "before image". This
would save binlog space. TODO
*/
DBUG_ENTER("Rows_log_event::do_add_row_data");
DBUG_PRINT("enter", ("row_data: 0x%lx length: %lu", (ulong) row_data,
(ulong) length));
/*
Don't print debug messages when running valgrind since they can
trigger false warnings.
*/
#ifndef HAVE_purify
DBUG_DUMP("row_data", row_data, min(length, 32));
#endif
DBUG_ASSERT(m_rows_buf <= m_rows_cur);
DBUG_ASSERT(!m_rows_buf || (m_rows_end && m_rows_buf < m_rows_end));
DBUG_ASSERT(m_rows_cur <= m_rows_end);
/* The cast will always work since m_rows_cur <= m_rows_end */
if (static_cast<size_t>(m_rows_end - m_rows_cur) <= length)
{
size_t const block_size= 1024;
my_ptrdiff_t const cur_size= m_rows_cur - m_rows_buf;
my_ptrdiff_t const new_alloc=
block_size * ((cur_size + length + block_size - 1) / block_size);
uchar* const new_buf= (uchar*)my_realloc((uchar*)m_rows_buf, (uint) new_alloc,
MYF(MY_ALLOW_ZERO_PTR|MY_WME));
if (unlikely(!new_buf))
DBUG_RETURN(HA_ERR_OUT_OF_MEM);
/* If the memory moved, we need to move the pointers */
if (new_buf != m_rows_buf)
{
m_rows_buf= new_buf;
m_rows_cur= m_rows_buf + cur_size;
}
/*
The end pointer should always be changed to point to the end of
the allocated memory.
*/
m_rows_end= m_rows_buf + new_alloc;
}
DBUG_ASSERT(m_rows_cur + length <= m_rows_end);
memcpy(m_rows_cur, row_data, length);
m_rows_cur+= length;
m_row_count++;
DBUG_RETURN(0);
}
#endif
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
int Rows_log_event::do_apply_event(Relay_log_info const *rli)
{
DBUG_ENTER("Rows_log_event::do_apply_event(Relay_log_info*)");
int error= 0;
/*
If m_table_id == ~0UL, then we have a dummy event that does not
contain any data. In that case, we just remove all tables in the
tables_to_lock list, close the thread tables, and return with
success.
*/
if (m_table_id == ~0UL)
{
/*
This one is supposed to be set: just an extra check so that
nothing strange has happened.
*/
DBUG_ASSERT(get_flags(STMT_END_F));
const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
close_thread_tables(thd);
thd->clear_error();
DBUG_RETURN(0);
}
/*
'thd' has been set by exec_relay_log_event(), just before calling
do_apply_event(). We still check here to prevent future coding
errors.
*/
DBUG_ASSERT(rli->sql_thd == thd);
/*
If there is no locks taken, this is the first binrow event seen
after the table map events. We should then lock all the tables
used in the transaction and proceed with execution of the actual
event.
*/
if (!thd->lock)
{
/*
Lock_tables() reads the contents of thd->lex, so they must be
initialized.
We also call the mysql_reset_thd_for_next_command(), since this
is the logical start of the next "statement". Note that this
call might reset the value of current_stmt_binlog_row_based, so
we need to do any changes to that value after this function.
*/
lex_start(thd);
mysql_reset_thd_for_next_command(thd);
/*
The current statement is just about to begin and
has not yet modified anything. Note, all.modified is reset
by mysql_reset_thd_for_next_command.
*/
thd->transaction.stmt.modified_non_trans_table= FALSE;
/*
Check if the slave is set to use SBR. If so, it should switch
to using RBR until the end of the "statement", i.e., next
STMT_END_F or next error.
*/
if (!thd->current_stmt_binlog_row_based &&
mysql_bin_log.is_open() && (thd->options & OPTION_BIN_LOG))
{
thd->set_current_stmt_binlog_row_based();
}
/*
There are a few flags that are replicated with each row event.
Make sure to set/clear them before executing the main body of
the event.
*/
if (get_flags(NO_FOREIGN_KEY_CHECKS_F))
thd->options|= OPTION_NO_FOREIGN_KEY_CHECKS;
else
thd->options&= ~OPTION_NO_FOREIGN_KEY_CHECKS;
if (get_flags(RELAXED_UNIQUE_CHECKS_F))
thd->options|= OPTION_RELAXED_UNIQUE_CHECKS;
else
thd->options&= ~OPTION_RELAXED_UNIQUE_CHECKS;
/* A small test to verify that objects have consistent types */
DBUG_ASSERT(sizeof(thd->options) == sizeof(OPTION_RELAXED_UNIQUE_CHECKS));
if (simple_open_n_lock_tables(thd, rli->tables_to_lock))
{
uint actual_error= thd->main_da.sql_errno();
if (thd->is_slave_error || thd->is_fatal_error)
{
/*
Error reporting borrowed from Query_log_event with many excessive
simplifications.
We should not honour --slave-skip-errors at this point as we are
having severe errors which should not be skiped.
*/
rli->report(ERROR_LEVEL, actual_error,
"Error '%s' on opening tables",
(actual_error ? thd->main_da.message() :
"unexpected success or fatal error"));
thd->is_slave_error= 1;
}
const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
DBUG_RETURN(actual_error);
}
/*
When the open and locking succeeded, we check all tables to
ensure that they still have the correct type.
We can use a down cast here since we know that every table added
to the tables_to_lock is a RPL_TABLE_LIST.
*/
{
RPL_TABLE_LIST *ptr= rli->tables_to_lock;
for ( ; ptr ; ptr= static_cast<RPL_TABLE_LIST*>(ptr->next_global))
{
if (ptr->m_tabledef.compatible_with(rli, ptr->table))
{
/*
We should not honour --slave-skip-errors at this point as we are
having severe errors which should not be skiped.
*/
mysql_unlock_tables(thd, thd->lock);
thd->lock= 0;
thd->is_slave_error= 1;
const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
DBUG_RETURN(ERR_BAD_TABLE_DEF);
}
}
}
/*
... and then we add all the tables to the table map and remove
them from tables to lock.
We also invalidate the query cache for all the tables, since
they will now be changed.
TODO [/Matz]: Maybe the query cache should not be invalidated
here? It might be that a table is not changed, even though it
was locked for the statement. We do know that each
Rows_log_event contain at least one row, so after processing one
Rows_log_event, we can invalidate the query cache for the
associated table.
*/
for (TABLE_LIST *ptr= rli->tables_to_lock ; ptr ; ptr= ptr->next_global)
{
const_cast<Relay_log_info*>(rli)->m_table_map.set_table(ptr->table_id, ptr->table);
}
#ifdef HAVE_QUERY_CACHE
query_cache.invalidate_locked_for_write(rli->tables_to_lock);
#endif
}
TABLE*
table=
m_table= const_cast<Relay_log_info*>(rli)->m_table_map.get_table(m_table_id);
DBUG_PRINT("debug", ("m_table: 0x%lx, m_table_id: %lu", (ulong) m_table, m_table_id));
if (table)
{
bool transactional_table= table->file->has_transactions();
/*
table == NULL means that this table should not be replicated
(this was set up by Table_map_log_event::do_apply_event()
which tested replicate-* rules).
*/
/*
It's not needed to set_time() but
1) it continues the property that "Time" in SHOW PROCESSLIST shows how
much slave is behind
2) it will be needed when we allow replication from a table with no
TIMESTAMP column to a table with one.
So we call set_time(), like in SBR. Presently it changes nothing.
*/
thd->set_time((time_t)when);
/*
Now we are in a statement and will stay in a statement until we
see a STMT_END_F.
We set this flag here, before actually applying any rows, in
case the SQL thread is stopped and we need to detect that we're
inside a statement and halting abruptly might cause problems
when restarting.
*/
const_cast<Relay_log_info*>(rli)->set_flag(Relay_log_info::IN_STMT);
if ( m_width == table->s->fields && bitmap_is_set_all(&m_cols))
set_flags(COMPLETE_ROWS_F);
/*
Set tables write and read sets.
Read_set contains all slave columns (in case we are going to fetch
a complete record from slave)
Write_set equals the m_cols bitmap sent from master but it can be
longer if slave has extra columns.
*/
DBUG_PRINT_BITSET("debug", "Setting table's write_set from: %s", &m_cols);
bitmap_set_all(table->read_set);
bitmap_set_all(table->write_set);
if (!get_flags(COMPLETE_ROWS_F))
bitmap_intersect(table->write_set,&m_cols);
this->slave_exec_mode= slave_exec_mode_options; // fix the mode
// Do event specific preparations
error= do_before_row_operations(rli);
/*
Bug#56662 Assertion failed: next_insert_id == 0, file handler.cc
Don't allow generation of auto_increment value when processing
rows event by setting 'MODE_NO_AUTO_VALUE_ON_ZERO'.
*/
ulong saved_sql_mode= thd->variables.sql_mode;
thd->variables.sql_mode= MODE_NO_AUTO_VALUE_ON_ZERO;
// row processing loop
while (error == 0 && m_curr_row < m_rows_end)
{
/* in_use can have been set to NULL in close_tables_for_reopen */
THD* old_thd= table->in_use;
if (!table->in_use)
table->in_use= thd;
error= do_exec_row(rli);
DBUG_PRINT("info", ("error: %s", HA_ERR(error)));
DBUG_ASSERT(error != HA_ERR_RECORD_DELETED);
table->in_use = old_thd;
if (error)
{
int actual_error= convert_handler_error(error, thd, table);
bool idempotent_error= (idempotent_error_code(error) &&
(slave_exec_mode & SLAVE_EXEC_MODE_IDEMPOTENT));
bool ignored_error= (idempotent_error == 0 ?
ignored_error_code(actual_error) : 0);
if (idempotent_error || ignored_error)
{
if (global_system_variables.log_warnings)
slave_rows_error_report(WARNING_LEVEL, error, rli, thd, table,
get_type_str(),
RPL_LOG_NAME, (ulong) log_pos);
clear_all_errors(thd, const_cast<Relay_log_info*>(rli));
error= 0;
if (idempotent_error == 0)
break;
}
}
/*
If m_curr_row_end was not set during event execution (e.g., because
of errors) we can't proceed to the next row. If the error is transient
(i.e., error==0 at this point) we must call unpack_current_row() to set
m_curr_row_end.
*/
DBUG_PRINT("info", ("curr_row: 0x%lu; curr_row_end: 0x%lu; rows_end: 0x%lu",
(ulong) m_curr_row, (ulong) m_curr_row_end, (ulong) m_rows_end));
if (!m_curr_row_end && !error)
error= unpack_current_row(rli);
// at this moment m_curr_row_end should be set
DBUG_ASSERT(error || m_curr_row_end != NULL);
DBUG_ASSERT(error || m_curr_row < m_curr_row_end);
DBUG_ASSERT(error || m_curr_row_end <= m_rows_end);
m_curr_row= m_curr_row_end;
if (error == 0 && !transactional_table)
thd->transaction.all.modified_non_trans_table=
thd->transaction.stmt.modified_non_trans_table= TRUE;
} // row processing loop
/*
Restore the sql_mode after the rows event is processed.
*/
thd->variables.sql_mode= saved_sql_mode;
DBUG_EXECUTE_IF("STOP_SLAVE_after_first_Rows_event",
const_cast<Relay_log_info*>(rli)->abort_slave= 1;);
if ((error= do_after_row_operations(rli, error)) &&
ignored_error_code(convert_handler_error(error, thd, table)))
{
if (global_system_variables.log_warnings)
slave_rows_error_report(WARNING_LEVEL, error, rli, thd, table,
get_type_str(),
RPL_LOG_NAME, (ulong) log_pos);
clear_all_errors(thd, const_cast<Relay_log_info*>(rli));
error= 0;
}
} // if (table)
/*
We need to delay this clear until here bacause unpack_current_row() uses
master-side table definitions stored in rli.
*/
if (rli->tables_to_lock && get_flags(STMT_END_F))
const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
if (error)
{
slave_rows_error_report(ERROR_LEVEL, error, rli, thd, table,
get_type_str(),
RPL_LOG_NAME, (ulong) log_pos);
thd->reset_current_stmt_binlog_row_based();
thd->is_slave_error= 1;
DBUG_RETURN(error);
}
/*
This code would ideally be placed in do_update_pos() instead, but
since we have no access to table there, we do the setting of
last_event_start_time here instead.
*/
else if (table && (table->s->primary_key == MAX_KEY) &&
!cache_stmt && get_flags(STMT_END_F) == RLE_NO_FLAGS)
{
/*
------------ Temporary fix until WL#2975 is implemented ---------
This event is not the last one (no STMT_END_F). If we stop now
(in case of terminate_slave_thread()), how will we restart? We
have to restart from Table_map_log_event, but as this table is
not transactional, the rows already inserted will still be
present, and idempotency is not guaranteed (no PK) so we risk
that repeating leads to double insert. So we desperately try to
continue, hope we'll eventually leave this buggy situation (by
executing the final Rows_log_event). If we are in a hopeless
wait (reached end of last relay log and nothing gets appended
there), we timeout after one minute, and notify DBA about the
problem. When WL#2975 is implemented, just remove the member
Relay_log_info::last_event_start_time and all its occurrences.
*/
const_cast<Relay_log_info*>(rli)->last_event_start_time= my_time(0);
}
if (get_flags(STMT_END_F) && (error= rows_event_stmt_cleanup(rli, thd)))
slave_rows_error_report(ERROR_LEVEL,
thd->is_error() ? 0 : error,
rli, thd, table,
get_type_str(),
RPL_LOG_NAME, (ulong) log_pos);
DBUG_RETURN(error);
}
Log_event::enum_skip_reason
Rows_log_event::do_shall_skip(Relay_log_info *rli)
{
/*
If the slave skip counter is 1 and this event does not end a
statement, then we should not start executing on the next event.
Otherwise, we defer the decision to the normal skipping logic.
*/
if (rli->slave_skip_counter == 1 && !get_flags(STMT_END_F))
return Log_event::EVENT_SKIP_IGNORE;
else
return Log_event::do_shall_skip(rli);
}
/**
The function is called at Rows_log_event statement commit time,
normally from Rows_log_event::do_update_pos() and possibly from
Query_log_event::do_apply_event() of the COMMIT.
The function commits the last statement for engines, binlog and
releases resources have been allocated for the statement.
@retval 0 Ok.
@retval non-zero Error at the commit.
*/
static int rows_event_stmt_cleanup(Relay_log_info const *rli, THD * thd)
{
int error;
{
/*
This is the end of a statement or transaction, so close (and
unlock) the tables we opened when processing the
Table_map_log_event starting the statement.
OBSERVER. This will clear *all* mappings, not only those that
are open for the table. There is not good handle for on-close
actions for tables.
NOTE. Even if we have no table ('table' == 0) we still need to be
here, so that we increase the group relay log position. If we didn't, we
could have a group relay log position which lags behind "forever"
(assume the last master's transaction is ignored by the slave because of
replicate-ignore rules).
*/
error= thd->binlog_flush_pending_rows_event(true);
/*
If this event is not in a transaction, the call below will, if some
transactional storage engines are involved, commit the statement into
them and flush the pending event to binlog.
If this event is in a transaction, the call will do nothing, but a
Xid_log_event will come next which will, if some transactional engines
are involved, commit the transaction and flush the pending event to the
binlog.
*/
error|= ha_autocommit_or_rollback(thd, error);
/*
Now what if this is not a transactional engine? we still need to
flush the pending event to the binlog; we did it with
thd->binlog_flush_pending_rows_event(). Note that we imitate
what is done for real queries: a call to
ha_autocommit_or_rollback() (sometimes only if involves a
transactional engine), and a call to be sure to have the pending
event flushed.
*/
thd->reset_current_stmt_binlog_row_based();
const_cast<Relay_log_info*>(rli)->cleanup_context(thd, 0);
}
return error;
}
/**
The method either increments the relay log position or
commits the current statement and increments the master group
possition if the event is STMT_END_F flagged and
the statement corresponds to the autocommit query (i.e replicated
without wrapping in BEGIN/COMMIT)
@retval 0 Success
@retval non-zero Error in the statement commit
*/
int
Rows_log_event::do_update_pos(Relay_log_info *rli)
{
DBUG_ENTER("Rows_log_event::do_update_pos");
int error= 0;
DBUG_PRINT("info", ("flags: %s",
get_flags(STMT_END_F) ? "STMT_END_F " : ""));
if (get_flags(STMT_END_F))
{
/*
Indicate that a statement is finished.
Step the group log position if we are not in a transaction,
otherwise increase the event log position.
*/
rli->stmt_done(log_pos, when);
/*
Clear any errors in thd->net.last_err*. It is not known if this is
needed or not. It is believed that any errors that may exist in
thd->net.last_err* are allowed. Examples of errors are "key not
found", which is produced in the test case rpl_row_conflicts.test
*/
thd->clear_error();
}
else
{
rli->inc_event_relay_log_pos();
}
DBUG_RETURN(error);
}
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */
#ifndef MYSQL_CLIENT
bool Rows_log_event::write_data_header(IO_CACHE *file)
{
uchar buf[ROWS_HEADER_LEN]; // No need to init the buffer
DBUG_ASSERT(m_table_id != ~0UL);
DBUG_EXECUTE_IF("old_row_based_repl_4_byte_map_id_master",
{
int4store(buf + 0, m_table_id);
int2store(buf + 4, m_flags);
return (my_b_safe_write(file, buf, 6));
});
int6store(buf + RW_MAPID_OFFSET, (ulonglong)m_table_id);
int2store(buf + RW_FLAGS_OFFSET, m_flags);
return (my_b_safe_write(file, buf, ROWS_HEADER_LEN));
}
bool Rows_log_event::write_data_body(IO_CACHE*file)
{
/*
Note that this should be the number of *bits*, not the number of
bytes.
*/
uchar sbuf[sizeof(m_width) + 1];
my_ptrdiff_t const data_size= m_rows_cur - m_rows_buf;
bool res= false;
uchar *const sbuf_end= net_store_length(sbuf, (size_t) m_width);
DBUG_ASSERT(static_cast<size_t>(sbuf_end - sbuf) <= sizeof(sbuf));
DBUG_DUMP("m_width", sbuf, (size_t) (sbuf_end - sbuf));
res= res || my_b_safe_write(file, sbuf, (size_t) (sbuf_end - sbuf));
DBUG_DUMP("m_cols", (uchar*) m_cols.bitmap, no_bytes_in_map(&m_cols));
res= res || my_b_safe_write(file, (uchar*) m_cols.bitmap,
no_bytes_in_map(&m_cols));
/*
TODO[refactor write]: Remove the "down cast" here (and elsewhere).
*/
if (get_type_code() == UPDATE_ROWS_EVENT)
{
DBUG_DUMP("m_cols_ai", (uchar*) m_cols_ai.bitmap,
no_bytes_in_map(&m_cols_ai));
res= res || my_b_safe_write(file, (uchar*) m_cols_ai.bitmap,
no_bytes_in_map(&m_cols_ai));
}
DBUG_DUMP("rows", m_rows_buf, data_size);
res= res || my_b_safe_write(file, m_rows_buf, (size_t) data_size);
return res;
}
#endif
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Rows_log_event::pack_info(Protocol *protocol)
{
char buf[256];
char const *const flagstr=
get_flags(STMT_END_F) ? " flags: STMT_END_F" : "";
size_t bytes= my_snprintf(buf, sizeof(buf),
"table_id: %lu%s", m_table_id, flagstr);
protocol->store(buf, bytes, &my_charset_bin);
}
#endif
#ifdef MYSQL_CLIENT
void Rows_log_event::print_helper(FILE *file,
PRINT_EVENT_INFO *print_event_info,
char const *const name)
{
IO_CACHE *const head= &print_event_info->head_cache;
IO_CACHE *const body= &print_event_info->body_cache;
if (!print_event_info->short_form)
{
bool const last_stmt_event= get_flags(STMT_END_F);
print_header(head, print_event_info, !last_stmt_event);
my_b_printf(head, "\t%s: table id %lu%s\n",
name, m_table_id,
last_stmt_event ? " flags: STMT_END_F" : "");
print_base64(body, print_event_info, !last_stmt_event);
}
if (get_flags(STMT_END_F))
{
copy_event_cache_to_file_and_reinit(head, file);
copy_event_cache_to_file_and_reinit(body, file);
}
}
#endif
/**************************************************************************
Table_map_log_event member functions and support functions
**************************************************************************/
/**
@page How replication of field metadata works.
When a table map is created, the master first calls
Table_map_log_event::save_field_metadata() which calculates how many
values will be in the field metadata. Only those fields that require the
extra data are added. The method also loops through all of the fields in
the table calling the method Field::save_field_metadata() which returns the
values for the field that will be saved in the metadata and replicated to
the slave. Once all fields have been processed, the table map is written to
the binlog adding the size of the field metadata and the field metadata to
the end of the body of the table map.
When a table map is read on the slave, the field metadata is read from the
table map and passed to the table_def class constructor which saves the
field metadata from the table map into an array based on the type of the
field. Field metadata values not present (those fields that do not use extra
data) in the table map are initialized as zero (0). The array size is the
same as the columns for the table on the slave.
Additionally, values saved for field metadata on the master are saved as a
string of bytes (uchar) in the binlog. A field may require 1 or more bytes
to store the information. In cases where values require multiple bytes
(e.g. values > 255), the endian-safe methods are used to properly encode
the values on the master and decode them on the slave. When the field
metadata values are captured on the slave, they are stored in an array of
type uint16. This allows the least number of casts to prevent casting bugs
when the field metadata is used in comparisons of field attributes. When
the field metadata is used for calculating addresses in pointer math, the
type used is uint32.
*/
#if !defined(MYSQL_CLIENT)
/**
Save the field metadata based on the real_type of the field.
The metadata saved depends on the type of the field. Some fields
store a single byte for pack_length() while others store two bytes
for field_length (max length).
@retval 0 Ok.
@todo
We may want to consider changing the encoding of the information.
Currently, the code attempts to minimize the number of bytes written to
the tablemap. There are at least two other alternatives; 1) using
net_store_length() to store the data allowing it to choose the number of
bytes that are appropriate thereby making the code much easier to
maintain (only 1 place to change the encoding), or 2) use a fixed number
of bytes for each field. The problem with option 1 is that net_store_length()
will use one byte if the value < 251, but 3 bytes if it is > 250. Thus,
for fields like CHAR which can be no larger than 255 characters, the method
will use 3 bytes when the value is > 250. Further, every value that is
encoded using 2 parts (e.g., pack_length, field_length) will be numerically
> 250 therefore will use 3 bytes for eah value. The problem with option 2
is less wasteful for space but does waste 1 byte for every field that does
not encode 2 parts.
*/
int Table_map_log_event::save_field_metadata()
{
DBUG_ENTER("Table_map_log_event::save_field_metadata");
int index= 0;
for (unsigned int i= 0 ; i < m_table->s->fields ; i++)
index+= m_table->s->field[i]->save_field_metadata(&m_field_metadata[index]);
DBUG_RETURN(index);
}
#endif /* !defined(MYSQL_CLIENT) */
/*
Constructor used to build an event for writing to the binary log.
Mats says tbl->s lives longer than this event so it's ok to copy pointers
(tbl->s->db etc) and not pointer content.
*/
#if !defined(MYSQL_CLIENT)
Table_map_log_event::Table_map_log_event(THD *thd, TABLE *tbl, ulong tid,
bool is_transactional)
: Log_event(thd, 0, true),
m_table(tbl),
m_dbnam(tbl->s->db.str),
m_dblen(m_dbnam ? tbl->s->db.length : 0),
m_tblnam(tbl->s->table_name.str),
m_tbllen(tbl->s->table_name.length),
m_colcnt(tbl->s->fields),
m_memory(NULL),
m_table_id(tid),
m_flags(TM_BIT_LEN_EXACT_F),
m_data_size(0),
m_field_metadata(0),
m_field_metadata_size(0),
m_null_bits(0),
m_meta_memory(NULL)
{
uchar cbuf[sizeof(m_colcnt) + 1];
uchar *cbuf_end;
DBUG_ASSERT(m_table_id != ~0UL);
/*
In TABLE_SHARE, "db" and "table_name" are 0-terminated (see this comment in
table.cc / alloc_table_share():
Use the fact the key is db/0/table_name/0
As we rely on this let's assert it.
*/
DBUG_ASSERT((tbl->s->db.str == 0) ||
(tbl->s->db.str[tbl->s->db.length] == 0));
DBUG_ASSERT(tbl->s->table_name.str[tbl->s->table_name.length] == 0);
m_data_size= TABLE_MAP_HEADER_LEN;
DBUG_EXECUTE_IF("old_row_based_repl_4_byte_map_id_master", m_data_size= 6;);
m_data_size+= m_dblen + 2; // Include length and terminating \0
m_data_size+= m_tbllen + 2; // Include length and terminating \0
cbuf_end= net_store_length(cbuf, (size_t) m_colcnt);
DBUG_ASSERT(static_cast<size_t>(cbuf_end - cbuf) <= sizeof(cbuf));
m_data_size+= (cbuf_end - cbuf) + m_colcnt; // COLCNT and column types
/* If malloc fails, caught in is_valid() */
if ((m_memory= (uchar*) my_malloc(m_colcnt, MYF(MY_WME))))
{
m_coltype= reinterpret_cast<uchar*>(m_memory);
for (unsigned int i= 0 ; i < m_table->s->fields ; ++i)
m_coltype[i]= m_table->field[i]->type();
}
/*
Calculate a bitmap for the results of maybe_null() for all columns.
The bitmap is used to determine when there is a column from the master
that is not on the slave and is null and thus not in the row data during
replication.
*/
uint num_null_bytes= (m_table->s->fields + 7) / 8;
m_data_size+= num_null_bytes;
m_meta_memory= (uchar *)my_multi_malloc(MYF(MY_WME),
&m_null_bits, num_null_bytes,
&m_field_metadata, (m_colcnt * 2),
NULL);
bzero(m_field_metadata, (m_colcnt * 2));
/*
Create an array for the field metadata and store it.
*/
m_field_metadata_size= save_field_metadata();
DBUG_ASSERT(m_field_metadata_size <= (m_colcnt * 2));
/*
Now set the size of the data to the size of the field metadata array
plus one or three bytes (see pack.c:net_store_length) for number of
elements in the field metadata array.
*/
if (m_field_metadata_size < 251)
m_data_size+= m_field_metadata_size + 1;
else
m_data_size+= m_field_metadata_size + 3;
bzero(m_null_bits, num_null_bytes);
for (unsigned int i= 0 ; i < m_table->s->fields ; ++i)
if (m_table->field[i]->maybe_null())
m_null_bits[(i / 8)]+= 1 << (i % 8);
}
#endif /* !defined(MYSQL_CLIENT) */
/*
Constructor used by slave to read the event from the binary log.
*/
#if defined(HAVE_REPLICATION)
Table_map_log_event::Table_map_log_event(const char *buf, uint event_len,
const Format_description_log_event
*description_event)
: Log_event(buf, description_event),
#ifndef MYSQL_CLIENT
m_table(NULL),
#endif
m_dbnam(NULL), m_dblen(0), m_tblnam(NULL), m_tbllen(0),
m_colcnt(0), m_coltype(0),
m_memory(NULL), m_table_id(ULONG_MAX), m_flags(0),
m_data_size(0), m_field_metadata(0), m_field_metadata_size(0),
m_null_bits(0), m_meta_memory(NULL)
{
unsigned int bytes_read= 0;
DBUG_ENTER("Table_map_log_event::Table_map_log_event(const char*,uint,...)");
uint8 common_header_len= description_event->common_header_len;
uint8 post_header_len= description_event->post_header_len[TABLE_MAP_EVENT-1];
DBUG_PRINT("info",("event_len: %u common_header_len: %d post_header_len: %d",
event_len, common_header_len, post_header_len));
/*
Don't print debug messages when running valgrind since they can
trigger false warnings.
*/
#ifndef HAVE_purify
DBUG_DUMP("event buffer", (uchar*) buf, event_len);
#endif
/* Read the post-header */
const char *post_start= buf + common_header_len;
post_start+= TM_MAPID_OFFSET;
if (post_header_len == 6)
{
/* Master is of an intermediate source tree before 5.1.4. Id is 4 bytes */
m_table_id= uint4korr(post_start);
post_start+= 4;
}
else
{
DBUG_ASSERT(post_header_len == TABLE_MAP_HEADER_LEN);
m_table_id= (ulong) uint6korr(post_start);
post_start+= TM_FLAGS_OFFSET;
}
DBUG_ASSERT(m_table_id != ~0UL);
m_flags= uint2korr(post_start);
/* Read the variable part of the event */
const char *const vpart= buf + common_header_len + post_header_len;
/* Extract the length of the various parts from the buffer */
uchar const *const ptr_dblen= (uchar const*)vpart + 0;
m_dblen= *(uchar*) ptr_dblen;
/* Length of database name + counter + terminating null */
uchar const *const ptr_tbllen= ptr_dblen + m_dblen + 2;
m_tbllen= *(uchar*) ptr_tbllen;
/* Length of table name + counter + terminating null */
uchar const *const ptr_colcnt= ptr_tbllen + m_tbllen + 2;
uchar *ptr_after_colcnt= (uchar*) ptr_colcnt;
m_colcnt= net_field_length(&ptr_after_colcnt);
DBUG_PRINT("info",("m_dblen: %lu off: %ld m_tbllen: %lu off: %ld m_colcnt: %lu off: %ld",
(ulong) m_dblen, (long) (ptr_dblen-(const uchar*)vpart),
(ulong) m_tbllen, (long) (ptr_tbllen-(const uchar*)vpart),
m_colcnt, (long) (ptr_colcnt-(const uchar*)vpart)));
/* Allocate mem for all fields in one go. If fails, caught in is_valid() */
m_memory= (uchar*) my_multi_malloc(MYF(MY_WME),
&m_dbnam, (uint) m_dblen + 1,
&m_tblnam, (uint) m_tbllen + 1,
&m_coltype, (uint) m_colcnt,
NullS);
if (m_memory)
{
/* Copy the different parts into their memory */
strncpy(const_cast<char*>(m_dbnam), (const char*)ptr_dblen + 1, m_dblen + 1);
strncpy(const_cast<char*>(m_tblnam), (const char*)ptr_tbllen + 1, m_tbllen + 1);
memcpy(m_coltype, ptr_after_colcnt, m_colcnt);
ptr_after_colcnt= ptr_after_colcnt + m_colcnt;
bytes_read= (uint) (ptr_after_colcnt - (uchar *)buf);
DBUG_PRINT("info", ("Bytes read: %d.\n", bytes_read));
if (bytes_read < event_len)
{
m_field_metadata_size= net_field_length(&ptr_after_colcnt);
DBUG_ASSERT(m_field_metadata_size <= (m_colcnt * 2));
uint num_null_bytes= (m_colcnt + 7) / 8;
m_meta_memory= (uchar *)my_multi_malloc(MYF(MY_WME),
&m_null_bits, num_null_bytes,
&m_field_metadata, m_field_metadata_size,
NULL);
memcpy(m_field_metadata, ptr_after_colcnt, m_field_metadata_size);
ptr_after_colcnt= (uchar*)ptr_after_colcnt + m_field_metadata_size;
memcpy(m_null_bits, ptr_after_colcnt, num_null_bytes);
}
}
DBUG_VOID_RETURN;
}
#endif
Table_map_log_event::~Table_map_log_event()
{
my_free(m_meta_memory, MYF(MY_ALLOW_ZERO_PTR));
my_free(m_memory, MYF(MY_ALLOW_ZERO_PTR));
}
/*
Return value is an error code, one of:
-1 Failure to open table [from open_tables()]
0 Success
1 No room for more tables [from set_table()]
2 Out of memory [from set_table()]
3 Wrong table definition
4 Daisy-chaining RBR with SBR not possible
*/
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
int Table_map_log_event::do_apply_event(Relay_log_info const *rli)
{
RPL_TABLE_LIST *table_list;
char *db_mem, *tname_mem;
size_t dummy_len;
void *memory;
DBUG_ENTER("Table_map_log_event::do_apply_event(Relay_log_info*)");
DBUG_ASSERT(rli->sql_thd == thd);
/* Step the query id to mark what columns that are actually used. */
pthread_mutex_lock(&LOCK_thread_count);
thd->query_id= next_query_id();
pthread_mutex_unlock(&LOCK_thread_count);
if (!(memory= my_multi_malloc(MYF(MY_WME),
&table_list, (uint) sizeof(RPL_TABLE_LIST),
&db_mem, (uint) NAME_LEN + 1,
&tname_mem, (uint) NAME_LEN + 1,
NullS)))
DBUG_RETURN(HA_ERR_OUT_OF_MEM);
bzero(table_list, sizeof(*table_list));
table_list->db = db_mem;
table_list->alias= table_list->table_name = tname_mem;
table_list->lock_type= TL_WRITE;
table_list->next_global= table_list->next_local= 0;
table_list->table_id= m_table_id;
table_list->updating= 1;
strmov(table_list->db, rpl_filter->get_rewrite_db(m_dbnam, &dummy_len));
strmov(table_list->table_name, m_tblnam);
int error= 0;
if (rli->sql_thd->slave_thread /* filtering is for slave only */ &&
(!rpl_filter->db_ok(table_list->db) ||
(rpl_filter->is_on() && !rpl_filter->tables_ok("", table_list))))
{
my_free(memory, MYF(MY_WME));
}
else
{
DBUG_ASSERT(thd->lex->query_tables != table_list);
/*
Use placement new to construct the table_def instance in the
memory allocated for it inside table_list.
The memory allocated by the table_def structure (i.e., not the
memory allocated *for* the table_def structure) is released
inside Relay_log_info::clear_tables_to_lock() by calling the
table_def destructor explicitly.
*/
new (&table_list->m_tabledef)
table_def(m_coltype, m_colcnt,
m_field_metadata, m_field_metadata_size,
m_null_bits, m_flags);
table_list->m_tabledef_valid= TRUE;
table_list->skip_temporary= 1;
/*
We record in the slave's information that the table should be
locked by linking the table into the list of tables to lock.
*/
table_list->next_global= table_list->next_local= rli->tables_to_lock;
const_cast<Relay_log_info*>(rli)->tables_to_lock= table_list;
const_cast<Relay_log_info*>(rli)->tables_to_lock_count++;
/* 'memory' is freed in clear_tables_to_lock */
}
DBUG_RETURN(error);
}
Log_event::enum_skip_reason
Table_map_log_event::do_shall_skip(Relay_log_info *rli)
{
/*
If the slave skip counter is 1, then we should not start executing
on the next event.
*/
return continue_group(rli);
}
int Table_map_log_event::do_update_pos(Relay_log_info *rli)
{
rli->inc_event_relay_log_pos();
return 0;
}
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */
#ifndef MYSQL_CLIENT
bool Table_map_log_event::write_data_header(IO_CACHE *file)
{
DBUG_ASSERT(m_table_id != ~0UL);
uchar buf[TABLE_MAP_HEADER_LEN];
DBUG_EXECUTE_IF("old_row_based_repl_4_byte_map_id_master",
{
int4store(buf + 0, m_table_id);
int2store(buf + 4, m_flags);
return (my_b_safe_write(file, buf, 6));
});
int6store(buf + TM_MAPID_OFFSET, (ulonglong)m_table_id);
int2store(buf + TM_FLAGS_OFFSET, m_flags);
return (my_b_safe_write(file, buf, TABLE_MAP_HEADER_LEN));
}
bool Table_map_log_event::write_data_body(IO_CACHE *file)
{
DBUG_ASSERT(m_dbnam != NULL);
DBUG_ASSERT(m_tblnam != NULL);
/* We use only one byte per length for storage in event: */
DBUG_ASSERT(m_dblen < 128);
DBUG_ASSERT(m_tbllen < 128);
uchar const dbuf[]= { (uchar) m_dblen };
uchar const tbuf[]= { (uchar) m_tbllen };
uchar cbuf[sizeof(m_colcnt) + 1];
uchar *const cbuf_end= net_store_length(cbuf, (size_t) m_colcnt);
DBUG_ASSERT(static_cast<size_t>(cbuf_end - cbuf) <= sizeof(cbuf));
/*
Store the size of the field metadata.
*/
uchar mbuf[sizeof(m_field_metadata_size)];
uchar *const mbuf_end= net_store_length(mbuf, m_field_metadata_size);
return (my_b_safe_write(file, dbuf, sizeof(dbuf)) ||
my_b_safe_write(file, (const uchar*)m_dbnam, m_dblen+1) ||
my_b_safe_write(file, tbuf, sizeof(tbuf)) ||
my_b_safe_write(file, (const uchar*)m_tblnam, m_tbllen+1) ||
my_b_safe_write(file, cbuf, (size_t) (cbuf_end - cbuf)) ||
my_b_safe_write(file, m_coltype, m_colcnt) ||
my_b_safe_write(file, mbuf, (size_t) (mbuf_end - mbuf)) ||
my_b_safe_write(file, m_field_metadata, m_field_metadata_size),
my_b_safe_write(file, m_null_bits, (m_colcnt + 7) / 8));
}
#endif
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
/*
Print some useful information for the SHOW BINARY LOG information
field.
*/
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Table_map_log_event::pack_info(Protocol *protocol)
{
char buf[256];
size_t bytes= my_snprintf(buf, sizeof(buf),
"table_id: %lu (%s.%s)",
m_table_id, m_dbnam, m_tblnam);
protocol->store(buf, bytes, &my_charset_bin);
}
#endif
#endif
#ifdef MYSQL_CLIENT
void Table_map_log_event::print(FILE *, PRINT_EVENT_INFO *print_event_info)
{
if (!print_event_info->short_form)
{
print_header(&print_event_info->head_cache, print_event_info, TRUE);
my_b_printf(&print_event_info->head_cache,
"\tTable_map: `%s`.`%s` mapped to number %lu\n",
m_dbnam, m_tblnam, m_table_id);
print_base64(&print_event_info->body_cache, print_event_info, TRUE);
}
}
#endif
/**************************************************************************
Write_rows_log_event member functions
**************************************************************************/
/*
Constructor used to build an event for writing to the binary log.
*/
#if !defined(MYSQL_CLIENT)
Write_rows_log_event::Write_rows_log_event(THD *thd_arg, TABLE *tbl_arg,
ulong tid_arg,
MY_BITMAP const *cols,
bool is_transactional)
: Rows_log_event(thd_arg, tbl_arg, tid_arg, cols, is_transactional)
{
}
#endif
/*
Constructor used by slave to read the event from the binary log.
*/
#ifdef HAVE_REPLICATION
Write_rows_log_event::Write_rows_log_event(const char *buf, uint event_len,
const Format_description_log_event
*description_event)
: Rows_log_event(buf, event_len, WRITE_ROWS_EVENT, description_event)
{
}
#endif
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
int
Write_rows_log_event::do_before_row_operations(const Slave_reporting_capability *const)
{
int error= 0;
/**
todo: to introduce a property for the event (handler?) which forces
applying the event in the replace (idempotent) fashion.
*/
if ((slave_exec_mode & SLAVE_EXEC_MODE_IDEMPOTENT) ||
m_table->s->db_type()->db_type == DB_TYPE_NDBCLUSTER)
{
/*
We are using REPLACE semantics and not INSERT IGNORE semantics
when writing rows, that is: new rows replace old rows. We need to
inform the storage engine that it should use this behaviour.
*/
/* Tell the storage engine that we are using REPLACE semantics. */
thd->lex->duplicates= DUP_REPLACE;
/*
Pretend we're executing a REPLACE command: this is needed for
InnoDB and NDB Cluster since they are not (properly) checking the
lex->duplicates flag.
*/
thd->lex->sql_command= SQLCOM_REPLACE;
/*
Do not raise the error flag in case of hitting to an unique attribute
*/
m_table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
/*
NDB specific: update from ndb master wrapped as Write_rows
so that the event should be applied to replace slave's row
*/
m_table->file->extra(HA_EXTRA_WRITE_CAN_REPLACE);
/*
NDB specific: if update from ndb master wrapped as Write_rows
does not find the row it's assumed idempotent binlog applying
is taking place; don't raise the error.
*/
m_table->file->extra(HA_EXTRA_IGNORE_NO_KEY);
/*
TODO: the cluster team (Tomas?) says that it's better if the engine knows
how many rows are going to be inserted, then it can allocate needed memory
from the start.
*/
}
/*
We need TIMESTAMP_NO_AUTO_SET otherwise ha_write_row() will not use fill
any TIMESTAMP column with data from the row but instead will use
the event's current time.
As we replicate from TIMESTAMP to TIMESTAMP and slave has no extra
columns, we know that all TIMESTAMP columns on slave will receive explicit
data from the row, so TIMESTAMP_NO_AUTO_SET is ok.
When we allow a table without TIMESTAMP to be replicated to a table having
more columns including a TIMESTAMP column, or when we allow a TIMESTAMP
column to be replicated into a BIGINT column and the slave's table has a
TIMESTAMP column, then the slave's TIMESTAMP column will take its value
from set_time() which we called earlier (consistent with SBR). And then in
some cases we won't want TIMESTAMP_NO_AUTO_SET (will require some code to
analyze if explicit data is provided for slave's TIMESTAMP columns).
*/
m_table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
/* Honor next number column if present */
m_table->next_number_field= m_table->found_next_number_field;
/*
* Fixed Bug#45999, In RBR, Store engine of Slave auto-generates new
* sequence numbers for auto_increment fields if the values of them are 0.
* If generateing a sequence number is decided by the values of
* table->auto_increment_field_not_null and SQL_MODE(if includes
* MODE_NO_AUTO_VALUE_ON_ZERO) in update_auto_increment function.
* SQL_MODE of slave sql thread is always consistency with master's.
* In RBR, auto_increment fields never are NULL.
*/
m_table->auto_increment_field_not_null= TRUE;
return error;
}
int
Write_rows_log_event::do_after_row_operations(const Slave_reporting_capability *const,
int error)
{
int local_error= 0;
m_table->next_number_field=0;
m_table->auto_increment_field_not_null= FALSE;
if ((slave_exec_mode & SLAVE_EXEC_MODE_IDEMPOTENT) ||
m_table->s->db_type()->db_type == DB_TYPE_NDBCLUSTER)
{
m_table->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
m_table->file->extra(HA_EXTRA_WRITE_CANNOT_REPLACE);
/*
resetting the extra with
table->file->extra(HA_EXTRA_NO_IGNORE_NO_KEY);
fires bug#27077
explanation: file->reset() performs this duty
ultimately. Still todo: fix
*/
}
if ((local_error= m_table->file->ha_end_bulk_insert()))
{
m_table->file->print_error(local_error, MYF(0));
}
return error? error : local_error;
}
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
/*
Check if there are more UNIQUE keys after the given key.
*/
static int
last_uniq_key(TABLE *table, uint keyno)
{
while (++keyno < table->s->keys)
if (table->key_info[keyno].flags & HA_NOSAME)
return 0;
return 1;
}
/**
Check if an error is a duplicate key error.
This function is used to check if an error code is one of the
duplicate key error, i.e., and error code for which it is sensible
to do a <code>get_dup_key()</code> to retrieve the duplicate key.
@param errcode The error code to check.
@return <code>true</code> if the error code is such that
<code>get_dup_key()</code> will return true, <code>false</code>
otherwise.
*/
bool
is_duplicate_key_error(int errcode)
{
switch (errcode)
{
case HA_ERR_FOUND_DUPP_KEY:
case HA_ERR_FOUND_DUPP_UNIQUE:
return true;
}
return false;
}
/**
Write the current row into event's table.
The row is located in the row buffer, pointed by @c m_curr_row member.
Number of columns of the row is stored in @c m_width member (it can be
different from the number of columns in the table to which we insert).
Bitmap @c m_cols indicates which columns are present in the row. It is assumed
that event's table is already open and pointed by @c m_table.
If the same record already exists in the table it can be either overwritten
or an error is reported depending on the value of @c overwrite flag
(error reporting not yet implemented). Note that the matching record can be
different from the row we insert if we use primary keys to identify records in
the table.
The row to be inserted can contain values only for selected columns. The
missing columns are filled with default values using @c prepare_record()
function. If a matching record is found in the table and @c overwritte is
true, the missing columns are taken from it.
@param rli Relay log info (needed for row unpacking).
@param overwrite
Shall we overwrite if the row already exists or signal
error (currently ignored).
@returns Error code on failure, 0 on success.
This method, if successful, sets @c m_curr_row_end pointer to point at the
next row in the rows buffer. This is done when unpacking the row to be
inserted.
@note If a matching record is found, it is either updated using
@c ha_update_row() or first deleted and then new record written.
*/
int
Rows_log_event::write_row(const Relay_log_info *const rli,
const bool overwrite)
{
DBUG_ENTER("write_row");
DBUG_ASSERT(m_table != NULL && thd != NULL);
TABLE *table= m_table; // pointer to event's table
int error;
int UNINIT_VAR(keynum);
auto_afree_ptr<char> key(NULL);
prepare_record(table, m_width,
table->file->ht->db_type != DB_TYPE_NDBCLUSTER);
/* unpack row into table->record[0] */
if ((error= unpack_current_row(rli)))
DBUG_RETURN(error);
if (m_curr_row == m_rows_buf)
{
/* this is the first row to be inserted, we estimate the rows with
the size of the first row and use that value to initialize
storage engine for bulk insertion */
ulong estimated_rows= (m_rows_end - m_curr_row) / (m_curr_row_end - m_curr_row);
m_table->file->ha_start_bulk_insert(estimated_rows);
}
#ifndef DBUG_OFF
DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
DBUG_PRINT_BITSET("debug", "write_set = %s", table->write_set);
DBUG_PRINT_BITSET("debug", "read_set = %s", table->read_set);
#endif
/*
Try to write record. If a corresponding record already exists in the table,
we try to change it using ha_update_row() if possible. Otherwise we delete
it and repeat the whole process again.
TODO: Add safety measures against infinite looping.
*/
while ((error= table->file->ha_write_row(table->record[0])))
{
if (error == HA_ERR_LOCK_DEADLOCK ||
error == HA_ERR_LOCK_WAIT_TIMEOUT ||
(keynum= table->file->get_dup_key(error)) < 0 ||
!overwrite)
{
DBUG_PRINT("info",("get_dup_key returns %d)", keynum));
/*
Deadlock, waiting for lock or just an error from the handler
such as HA_ERR_FOUND_DUPP_KEY when overwrite is false.
Retrieval of the duplicate key number may fail
- either because the error was not "duplicate key" error
- or because the information which key is not available
*/
table->file->print_error(error, MYF(0));
DBUG_RETURN(error);
}
/*
We need to retrieve the old row into record[1] to be able to
either update or delete the offending record. We either:
- use rnd_pos() with a row-id (available as dupp_row) to the
offending row, if that is possible (MyISAM and Blackhole), or else
- use index_read_idx() with the key that is duplicated, to
retrieve the offending row.
*/
if (table->file->ha_table_flags() & HA_DUPLICATE_POS)
{
DBUG_PRINT("info",("Locating offending record using rnd_pos()"));
error= table->file->rnd_pos(table->record[1], table->file->dup_ref);
if (error)
{
DBUG_PRINT("info",("rnd_pos() returns error %d",error));
if (error == HA_ERR_RECORD_DELETED)
error= HA_ERR_KEY_NOT_FOUND;
table->file->print_error(error, MYF(0));
DBUG_RETURN(error);
}
}
else
{
DBUG_PRINT("info",("Locating offending record using index_read_idx()"));
if (table->file->extra(HA_EXTRA_FLUSH_CACHE))
{
DBUG_PRINT("info",("Error when setting HA_EXTRA_FLUSH_CACHE"));
DBUG_RETURN(my_errno);
}
if (key.get() == NULL)
{
key.assign(static_cast<char*>(my_alloca(table->s->max_unique_length)));
if (key.get() == NULL)
{
DBUG_PRINT("info",("Can't allocate key buffer"));
DBUG_RETURN(ENOMEM);
}
}
key_copy((uchar*)key.get(), table->record[0], table->key_info + keynum,
0);
error= table->file->index_read_idx_map(table->record[1], keynum,
(const uchar*)key.get(),
HA_WHOLE_KEY,
HA_READ_KEY_EXACT);
if (error)
{
DBUG_PRINT("info",("index_read_idx() returns %s", HA_ERR(error)));
if (error == HA_ERR_RECORD_DELETED)
error= HA_ERR_KEY_NOT_FOUND;
table->file->print_error(error, MYF(0));
DBUG_RETURN(error);
}
}
/*
Now, record[1] should contain the offending row. That
will enable us to update it or, alternatively, delete it (so
that we can insert the new row afterwards).
*/
/*
If row is incomplete we will use the record found to fill
missing columns.
*/
if (!get_flags(COMPLETE_ROWS_F))
{
restore_record(table,record[1]);
error= unpack_current_row(rli);
}
#ifndef DBUG_OFF
DBUG_PRINT("debug",("preparing for update: before and after image"));
DBUG_DUMP("record[1] (before)", table->record[1], table->s->reclength);
DBUG_DUMP("record[0] (after)", table->record[0], table->s->reclength);
#endif
/*
REPLACE is defined as either INSERT or DELETE + INSERT. If
possible, we can replace it with an UPDATE, but that will not
work on InnoDB if FOREIGN KEY checks are necessary.
I (Matz) am not sure of the reason for the last_uniq_key()
check as, but I'm guessing that it's something along the
following lines.
Suppose that we got the duplicate key to be a key that is not
the last unique key for the table and we perform an update:
then there might be another key for which the unique check will
fail, so we're better off just deleting the row and inserting
the correct row.
*/
if (last_uniq_key(table, keynum) &&
!table->file->referenced_by_foreign_key())
{
DBUG_PRINT("info",("Updating row using ha_update_row()"));
error=table->file->ha_update_row(table->record[1],
table->record[0]);
switch (error) {
case HA_ERR_RECORD_IS_THE_SAME:
DBUG_PRINT("info",("ignoring HA_ERR_RECORD_IS_THE_SAME error from"
" ha_update_row()"));
error= 0;
case 0:
break;
default:
DBUG_PRINT("info",("ha_update_row() returns error %d",error));
table->file->print_error(error, MYF(0));
}
DBUG_RETURN(error);
}
else
{
DBUG_PRINT("info",("Deleting offending row and trying to write new one again"));
if ((error= table->file->ha_delete_row(table->record[1])))
{
DBUG_PRINT("info",("ha_delete_row() returns error %d",error));
table->file->print_error(error, MYF(0));
DBUG_RETURN(error);
}
/* Will retry ha_write_row() with the offending row removed. */
}
}
DBUG_RETURN(error);
}
#endif
int
Write_rows_log_event::do_exec_row(const Relay_log_info *const rli)
{
DBUG_ASSERT(m_table != NULL);
int error= write_row(rli, (slave_exec_mode & SLAVE_EXEC_MODE_IDEMPOTENT));
if (error && !thd->is_error())
{
DBUG_ASSERT(0);
my_error(ER_UNKNOWN_ERROR, MYF(0));
}
return error;
}
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */
#ifdef MYSQL_CLIENT
void Write_rows_log_event::print(FILE *file, PRINT_EVENT_INFO* print_event_info)
{
Rows_log_event::print_helper(file, print_event_info, "Write_rows");
}
#endif
/**************************************************************************
Delete_rows_log_event member functions
**************************************************************************/
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
/*
Compares table->record[0] and table->record[1]
Returns TRUE if different.
*/
static bool record_compare(TABLE *table)
{
/*
Need to set the X bit and the filler bits in both records since
there are engines that do not set it correctly.
In addition, since MyISAM checks that one hasn't tampered with the
record, it is necessary to restore the old bytes into the record
after doing the comparison.
TODO[record format ndb]: Remove it once NDB returns correct
records. Check that the other engines also return correct records.
*/
DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
DBUG_DUMP("record[1]", table->record[1], table->s->reclength);
bool result= FALSE;
uchar saved_x[2]= {0, 0}, saved_filler[2]= {0, 0};
if (table->s->null_bytes > 0)
{
for (int i = 0 ; i < 2 ; ++i)
{
/*
If we have an X bit then we need to take care of it.
*/
if (!(table->s->db_options_in_use & HA_OPTION_PACK_RECORD))
{
saved_x[i]= table->record[i][0];
table->record[i][0]|= 1U;
}
/*
If (last_null_bit_pos == 0 && null_bytes > 1), then:
X bit (if any) + N nullable fields + M Field_bit fields = 8 bits
Ie, the entire byte is used.
*/
if (table->s->last_null_bit_pos > 0)
{
saved_filler[i]= table->record[i][table->s->null_bytes - 1];
table->record[i][table->s->null_bytes - 1]|=
256U - (1U << table->s->last_null_bit_pos);
}
}
}
if (table->s->blob_fields + table->s->varchar_fields == 0)
{
result= cmp_record(table,record[1]);
goto record_compare_exit;
}
/* Compare null bits */
if (memcmp(table->null_flags,
table->null_flags+table->s->rec_buff_length,
table->s->null_bytes))
{
result= TRUE; // Diff in NULL value
goto record_compare_exit;
}
/* Compare updated fields */
for (Field **ptr=table->field ; *ptr ; ptr++)
{
if ((*ptr)->cmp_binary_offset(table->s->rec_buff_length))
{
result= TRUE;
goto record_compare_exit;
}
}
record_compare_exit:
/*
Restore the saved bytes.
TODO[record format ndb]: Remove this code once NDB returns the
correct record format.
*/
if (table->s->null_bytes > 0)
{
for (int i = 0 ; i < 2 ; ++i)
{
if (!(table->s->db_options_in_use & HA_OPTION_PACK_RECORD))
table->record[i][0]= saved_x[i];
if (table->s->last_null_bit_pos)
table->record[i][table->s->null_bytes - 1]= saved_filler[i];
}
}
return result;
}
/**
Locate the current row in event's table.
The current row is pointed by @c m_curr_row. Member @c m_width tells how many
columns are there in the row (this can be differnet from the number of columns
in the table). It is assumed that event's table is already open and pointed
by @c m_table.
If a corresponding record is found in the table it is stored in
@c m_table->record[0]. Note that when record is located based on a primary
key, it is possible that the record found differs from the row being located.
If no key is specified or table does not have keys, a table scan is used to
find the row. In that case the row should be complete and contain values for
all columns. However, it can still be shorter than the table, i.e. the table
can contain extra columns not present in the row. It is also possible that
the table has fewer columns than the row being located.
@returns Error code on failure, 0 on success.
@post In case of success @c m_table->record[0] contains the record found.
Also, the internal "cursor" of the table is positioned at the record found.
@note If the engine allows random access of the records, a combination of
@c position() and @c rnd_pos() will be used.
*/
int Rows_log_event::find_row(const Relay_log_info *rli)
{
DBUG_ENTER("Rows_log_event::find_row");
DBUG_ASSERT(m_table && m_table->in_use != NULL);
TABLE *table= m_table;
int error= 0;
/*
rpl_row_tabledefs.test specifies that
if the extra field on the slave does not have a default value
and this is okay with Delete or Update events.
Todo: fix wl3228 hld that requires defauls for all types of events
*/
prepare_record(table, m_width, FALSE);
error= unpack_current_row(rli);
#ifndef DBUG_OFF
DBUG_PRINT("info",("looking for the following record"));
DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
#endif
if ((table->file->ha_table_flags() & HA_PRIMARY_KEY_REQUIRED_FOR_POSITION) &&
table->s->primary_key < MAX_KEY)
{
/*
Use a more efficient method to fetch the record given by
table->record[0] if the engine allows it. We first compute a
row reference using the position() member function (it will be
stored in table->file->ref) and the use rnd_pos() to position
the "cursor" (i.e., record[0] in this case) at the correct row.
TODO: Add a check that the correct record has been fetched by
comparing with the original record. Take into account that the
record on the master and slave can be of different
length. Something along these lines should work:
ADD>>> store_record(table,record[1]);
int error= table->file->rnd_pos(table->record[0], table->file->ref);
ADD>>> DBUG_ASSERT(memcmp(table->record[1], table->record[0],
table->s->reclength) == 0);
*/
DBUG_PRINT("info",("locating record using primary key (position)"));
int error= table->file->rnd_pos_by_record(table->record[0]);
if (error)
{
DBUG_PRINT("info",("rnd_pos returns error %d",error));
if (error == HA_ERR_RECORD_DELETED)
error= HA_ERR_KEY_NOT_FOUND;
table->file->print_error(error, MYF(0));
}
DBUG_RETURN(error);
}
// We can't use position() - try other methods.
/*
We need to retrieve all fields
TODO: Move this out from this function to main loop
*/
table->use_all_columns();
/*
Save copy of the record in table->record[1]. It might be needed
later if linear search is used to find exact match.
*/
store_record(table,record[1]);
if (table->s->keys > 0 && table->s->keys_in_use.is_set(0))
{
DBUG_PRINT("info",("locating record using primary key (index_read)"));
/* The 0th key is active: search the table using the index */
if (!table->file->inited && (error= table->file->ha_index_init(0, FALSE)))
{
DBUG_PRINT("info",("ha_index_init returns error %d",error));
table->file->print_error(error, MYF(0));
goto err;
}
/* Fill key data for the row */
DBUG_ASSERT(m_key);
key_copy(m_key, table->record[0], table->key_info, 0);
/*
Don't print debug messages when running valgrind since they can
trigger false warnings.
*/
#ifndef HAVE_purify
DBUG_DUMP("key data", m_key, table->key_info->key_length);
#endif
/*
We need to set the null bytes to ensure that the filler bit are
all set when returning. There are storage engines that just set
the necessary bits on the bytes and don't set the filler bits
correctly.
*/
if (table->s->null_bytes > 0)
table->record[0][table->s->null_bytes - 1]|=
256U - (1U << table->s->last_null_bit_pos);
if ((error= table->file->index_read_map(table->record[0], m_key,
HA_WHOLE_KEY,
HA_READ_KEY_EXACT)))
{
DBUG_PRINT("info",("no record matching the key found in the table"));
if (error == HA_ERR_RECORD_DELETED)
error= HA_ERR_KEY_NOT_FOUND;
table->file->print_error(error, MYF(0));
table->file->ha_index_end();
goto err;
}
/*
Don't print debug messages when running valgrind since they can
trigger false warnings.
*/
#ifndef HAVE_purify
DBUG_PRINT("info",("found first matching record"));
DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
#endif
/*
Below is a minor "optimization". If the key (i.e., key number
0) has the HA_NOSAME flag set, we know that we have found the
correct record (since there can be no duplicates); otherwise, we
have to compare the record with the one found to see if it is
the correct one.
CAVEAT! This behaviour is essential for the replication of,
e.g., the mysql.proc table since the correct record *shall* be
found using the primary key *only*. There shall be no
comparison of non-PK columns to decide if the correct record is
found. I can see no scenario where it would be incorrect to
chose the row to change only using a PK or an UNNI.
*/
if (table->key_info->flags & HA_NOSAME)
{
/* Unique does not have non nullable part */
if (!(table->key_info->flags & (HA_NULL_PART_KEY)))
{
table->file->ha_index_end();
goto ok;
}
else
{
KEY *keyinfo= table->key_info;
/*
Unique has nullable part. We need to check if there is any field in the
BI image that is null and part of UNNI.
*/
bool null_found= FALSE;
for (uint i=0; i < keyinfo->key_parts && !null_found; i++)
{
uint fieldnr= keyinfo->key_part[i].fieldnr - 1;
Field **f= table->field+fieldnr;
null_found= (*f)->is_null();
}
if (!null_found)
{
table->file->ha_index_end();
goto ok;
}
/* else fall through to index scan */
}
}
/*
In case key is not unique, we still have to iterate over records found
and find the one which is identical to the row given. A copy of the
record we are looking for is stored in record[1].
*/
DBUG_PRINT("info",("non-unique index, scanning it to find matching record"));
while (record_compare(table))
{
/*
We need to set the null bytes to ensure that the filler bit
are all set when returning. There are storage engines that
just set the necessary bits on the bytes and don't set the
filler bits correctly.
TODO[record format ndb]: Remove this code once NDB returns the
correct record format.
*/
if (table->s->null_bytes > 0)
{
table->record[0][table->s->null_bytes - 1]|=
256U - (1U << table->s->last_null_bit_pos);
}
while ((error= table->file->index_next(table->record[0])))
{
/* We just skip records that has already been deleted */
if (error == HA_ERR_RECORD_DELETED)
continue;
DBUG_PRINT("info",("no record matching the given row found"));
table->file->print_error(error, MYF(0));
table->file->ha_index_end();
goto err;
}
}
/*
Have to restart the scan to be able to fetch the next row.
*/
table->file->ha_index_end();
}
else
{
DBUG_PRINT("info",("locating record using table scan (rnd_next)"));
int restart_count= 0; // Number of times scanning has restarted from top
/* We don't have a key: search the table using rnd_next() */
if ((error= table->file->ha_rnd_init(1)))
{
DBUG_PRINT("info",("error initializing table scan"
" (ha_rnd_init returns %d)",error));
table->file->print_error(error, MYF(0));
goto err;
}
/* Continue until we find the right record or have made a full loop */
do
{
restart_rnd_next:
error= table->file->rnd_next(table->record[0]);
DBUG_PRINT("info", ("error: %s", HA_ERR(error)));
switch (error) {
case 0:
break;
/*
If the record was deleted, we pick the next one without doing
any comparisons.
*/
case HA_ERR_RECORD_DELETED:
goto restart_rnd_next;
case HA_ERR_END_OF_FILE:
if (++restart_count < 2)
table->file->ha_rnd_init(1);
break;
default:
DBUG_PRINT("info", ("Failed to get next record"
" (rnd_next returns %d)",error));
table->file->print_error(error, MYF(0));
table->file->ha_rnd_end();
goto err;
}
}
while (restart_count < 2 && record_compare(table));
/*
Note: above record_compare will take into accout all record fields
which might be incorrect in case a partial row was given in the event
*/
/*
Have to restart the scan to be able to fetch the next row.
*/
if (restart_count == 2)
DBUG_PRINT("info", ("Record not found"));
else
DBUG_DUMP("record found", table->record[0], table->s->reclength);
table->file->ha_rnd_end();
DBUG_ASSERT(error == HA_ERR_END_OF_FILE || error == 0);
goto err;
}
ok:
table->default_column_bitmaps();
DBUG_RETURN(0);
err:
table->default_column_bitmaps();
DBUG_RETURN(error);
}
#endif
/*
Constructor used to build an event for writing to the binary log.
*/
#ifndef MYSQL_CLIENT
Delete_rows_log_event::Delete_rows_log_event(THD *thd_arg, TABLE *tbl_arg,
ulong tid, MY_BITMAP const *cols,
bool is_transactional)
: Rows_log_event(thd_arg, tbl_arg, tid, cols, is_transactional)
{
}
#endif /* #if !defined(MYSQL_CLIENT) */
/*
Constructor used by slave to read the event from the binary log.
*/
#ifdef HAVE_REPLICATION
Delete_rows_log_event::Delete_rows_log_event(const char *buf, uint event_len,
const Format_description_log_event
*description_event)
: Rows_log_event(buf, event_len, DELETE_ROWS_EVENT, description_event)
{
}
#endif
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
int
Delete_rows_log_event::do_before_row_operations(const Slave_reporting_capability *const)
{
if ((m_table->file->ha_table_flags() & HA_PRIMARY_KEY_REQUIRED_FOR_POSITION) &&
m_table->s->primary_key < MAX_KEY)
{
/*
We don't need to allocate any memory for m_key since it is not used.
*/
return 0;
}
if (m_table->s->keys > 0)
{
// Allocate buffer for key searches
m_key= (uchar*)my_malloc(m_table->key_info->key_length, MYF(MY_WME));
if (!m_key)
return HA_ERR_OUT_OF_MEM;
}
return 0;
}
int
Delete_rows_log_event::do_after_row_operations(const Slave_reporting_capability *const,
int error)
{
/*error= ToDo:find out what this should really be, this triggers close_scan in nbd, returning error?*/
m_table->file->ha_index_or_rnd_end();
my_free(m_key, MYF(MY_ALLOW_ZERO_PTR));
m_key= NULL;
return error;
}
int Delete_rows_log_event::do_exec_row(const Relay_log_info *const rli)
{
int error;
DBUG_ASSERT(m_table != NULL);
if (!(error= find_row(rli)))
{
/*
Delete the record found, located in record[0]
*/
error= m_table->file->ha_delete_row(m_table->record[0]);
}
return error;
}
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */
#ifdef MYSQL_CLIENT
void Delete_rows_log_event::print(FILE *file,
PRINT_EVENT_INFO* print_event_info)
{
Rows_log_event::print_helper(file, print_event_info, "Delete_rows");
}
#endif
/**************************************************************************
Update_rows_log_event member functions
**************************************************************************/
/*
Constructor used to build an event for writing to the binary log.
*/
#if !defined(MYSQL_CLIENT)
Update_rows_log_event::Update_rows_log_event(THD *thd_arg, TABLE *tbl_arg,
ulong tid,
MY_BITMAP const *cols_bi,
MY_BITMAP const *cols_ai,
bool is_transactional)
: Rows_log_event(thd_arg, tbl_arg, tid, cols_bi, is_transactional)
{
init(cols_ai);
}
Update_rows_log_event::Update_rows_log_event(THD *thd_arg, TABLE *tbl_arg,
ulong tid,
MY_BITMAP const *cols,
bool is_transactional)
: Rows_log_event(thd_arg, tbl_arg, tid, cols, is_transactional)
{
init(cols);
}
void Update_rows_log_event::init(MY_BITMAP const *cols)
{
/* if bitmap_init fails, caught in is_valid() */
if (likely(!bitmap_init(&m_cols_ai,
m_width <= sizeof(m_bitbuf_ai)*8 ? m_bitbuf_ai : NULL,
m_width,
false)))
{
/* Cols can be zero if this is a dummy binrows event */
if (likely(cols != NULL))
{
memcpy(m_cols_ai.bitmap, cols->bitmap, no_bytes_in_map(cols));
create_last_word_mask(&m_cols_ai);
}
}
}
#endif /* !defined(MYSQL_CLIENT) */
Update_rows_log_event::~Update_rows_log_event()
{
if (m_cols_ai.bitmap == m_bitbuf_ai) // no my_malloc happened
m_cols_ai.bitmap= 0; // so no my_free in bitmap_free
bitmap_free(&m_cols_ai); // To pair with bitmap_init().
}
/*
Constructor used by slave to read the event from the binary log.
*/
#ifdef HAVE_REPLICATION
Update_rows_log_event::Update_rows_log_event(const char *buf, uint event_len,
const
Format_description_log_event
*description_event)
: Rows_log_event(buf, event_len, UPDATE_ROWS_EVENT, description_event)
{
}
#endif
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
int
Update_rows_log_event::do_before_row_operations(const Slave_reporting_capability *const)
{
if (m_table->s->keys > 0)
{
// Allocate buffer for key searches
m_key= (uchar*)my_malloc(m_table->key_info->key_length, MYF(MY_WME));
if (!m_key)
return HA_ERR_OUT_OF_MEM;
}
m_table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
return 0;
}
int
Update_rows_log_event::do_after_row_operations(const Slave_reporting_capability *const,
int error)
{
/*error= ToDo:find out what this should really be, this triggers close_scan in nbd, returning error?*/
m_table->file->ha_index_or_rnd_end();
my_free(m_key, MYF(MY_ALLOW_ZERO_PTR)); // Free for multi_malloc
m_key= NULL;
return error;
}
int
Update_rows_log_event::do_exec_row(const Relay_log_info *const rli)
{
DBUG_ASSERT(m_table != NULL);
int error= find_row(rli);
if (error)
{
/*
We need to read the second image in the event of error to be
able to skip to the next pair of updates
*/
m_curr_row= m_curr_row_end;
unpack_current_row(rli);
return error;
}
/*
This is the situation after locating BI:
===|=== before image ====|=== after image ===|===
^ ^
m_curr_row m_curr_row_end
BI found in the table is stored in record[0]. We copy it to record[1]
and unpack AI to record[0].
*/
store_record(m_table,record[1]);
m_curr_row= m_curr_row_end;
/* this also updates m_curr_row_end */
if ((error= unpack_current_row(rli)))
return error;
/*
Now we have the right row to update. The old row (the one we're
looking for) is in record[1] and the new row is in record[0].
*/
#ifndef HAVE_purify
/*
Don't print debug messages when running valgrind since they can
trigger false warnings.
*/
DBUG_PRINT("info",("Updating row in table"));
DBUG_DUMP("old record", m_table->record[1], m_table->s->reclength);
DBUG_DUMP("new values", m_table->record[0], m_table->s->reclength);
#endif
error= m_table->file->ha_update_row(m_table->record[1], m_table->record[0]);
if (error == HA_ERR_RECORD_IS_THE_SAME)
error= 0;
return error;
}
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */
#ifdef MYSQL_CLIENT
void Update_rows_log_event::print(FILE *file,
PRINT_EVENT_INFO* print_event_info)
{
Rows_log_event::print_helper(file, print_event_info, "Update_rows");
}
#endif
Incident_log_event::Incident_log_event(const char *buf, uint event_len,
const Format_description_log_event *descr_event)
: Log_event(buf, descr_event)
{
DBUG_ENTER("Incident_log_event::Incident_log_event");
uint8 const common_header_len=
descr_event->common_header_len;
uint8 const post_header_len=
descr_event->post_header_len[INCIDENT_EVENT-1];
DBUG_PRINT("info",("event_len: %u; common_header_len: %d; post_header_len: %d",
event_len, common_header_len, post_header_len));
int incident_number= uint2korr(buf + common_header_len);
if (incident_number >= INCIDENT_COUNT ||
incident_number <= INCIDENT_NONE)
{
// If the incident is not recognized, this binlog event is
// invalid. If we set incident_number to INCIDENT_NONE, the
// invalidity will be detected by is_valid().
m_incident= INCIDENT_NONE;
DBUG_VOID_RETURN;
}
m_incident= static_cast<Incident>(incident_number);
char const *ptr= buf + common_header_len + post_header_len;
char const *const str_end= buf + event_len;
uint8 len= 0; // Assignment to keep compiler happy
const char *str= NULL; // Assignment to keep compiler happy
read_str(&ptr, str_end, &str, &len);
m_message.str= const_cast<char*>(str);
m_message.length= len;
DBUG_PRINT("info", ("m_incident: %d", m_incident));
DBUG_VOID_RETURN;
}
Incident_log_event::~Incident_log_event()
{
}
const char *
Incident_log_event::description() const
{
static const char *const description[]= {
"NOTHING", // Not used
"LOST_EVENTS"
};
DBUG_PRINT("info", ("m_incident: %d", m_incident));
return description[m_incident];
}
#ifndef MYSQL_CLIENT
void Incident_log_event::pack_info(Protocol *protocol)
{
char buf[256];
size_t bytes;
if (m_message.length > 0)
bytes= my_snprintf(buf, sizeof(buf), "#%d (%s)",
m_incident, description());
else
bytes= my_snprintf(buf, sizeof(buf), "#%d (%s): %s",
m_incident, description(), m_message.str);
protocol->store(buf, bytes, &my_charset_bin);
}
#endif
#ifdef MYSQL_CLIENT
void
Incident_log_event::print(FILE *file,
PRINT_EVENT_INFO *print_event_info)
{
if (print_event_info->short_form)
return;
Write_on_release_cache cache(&print_event_info->head_cache, file);
print_header(&cache, print_event_info, FALSE);
my_b_printf(&cache, "\n# Incident: %s\nRELOAD DATABASE; # Shall generate syntax error\n", description());
}
#endif
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int
Incident_log_event::do_apply_event(Relay_log_info const *rli)
{
DBUG_ENTER("Incident_log_event::do_apply_event");
rli->report(ERROR_LEVEL, ER_SLAVE_INCIDENT,
ER(ER_SLAVE_INCIDENT),
description(),
m_message.length > 0 ? m_message.str : "<none>");
DBUG_RETURN(1);
}
#endif
bool
Incident_log_event::write_data_header(IO_CACHE *file)
{
DBUG_ENTER("Incident_log_event::write_data_header");
DBUG_PRINT("enter", ("m_incident: %d", m_incident));
uchar buf[sizeof(int16)];
int2store(buf, (int16) m_incident);
DBUG_RETURN(my_b_safe_write(file, buf, sizeof(buf)));
}
bool
Incident_log_event::write_data_body(IO_CACHE *file)
{
DBUG_ENTER("Incident_log_event::write_data_body");
DBUG_RETURN(write_str(file, m_message.str, (uint) m_message.length));
}
#ifdef MYSQL_CLIENT
/**
The default values for these variables should be values that are
*incorrect*, i.e., values that cannot occur in an event. This way,
they will always be printed for the first event.
*/
st_print_event_info::st_print_event_info()
:flags2_inited(0), sql_mode_inited(0), sql_mode(0),
auto_increment_increment(0),auto_increment_offset(0), charset_inited(0),
lc_time_names_number(~0),
charset_database_number(ILLEGAL_CHARSET_INFO_NUMBER),
thread_id(0), thread_id_printed(false),
base64_output_mode(BASE64_OUTPUT_UNSPEC), printed_fd_event(FALSE)
{
/*
Currently we only use static PRINT_EVENT_INFO objects, so zeroed at
program's startup, but these explicit bzero() is for the day someone
creates dynamic instances.
*/
bzero(db, sizeof(db));
bzero(charset, sizeof(charset));
bzero(time_zone_str, sizeof(time_zone_str));
delimiter[0]= ';';
delimiter[1]= 0;
myf const flags = MYF(MY_WME | MY_NABP);
open_cached_file(&head_cache, NULL, NULL, 0, flags);
open_cached_file(&body_cache, NULL, NULL, 0, flags);
}
#endif
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