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mariadb/sql/ha_myisam.cc
unknown 7b51154461 Support for TIMESTAMP columns holding NULL values. Unlike all other 
column types TIMESTAMP is NOT NULL by default, so in order to have 
TIMESTAMP column holding NULL valaues you have to specify NULL as
one of its attributes (this needed for backward compatibility).

Main changes:
Replaced TABLE::timestamp_default_now/on_update_now members with
TABLE::timestamp_auto_set_type flag which is used everywhere
for determining if we should auto-set value of TIMESTAMP field 
during this operation or not. We are also use Field_timestamp::set_time()
instead of handler::update_timestamp() in handlers.


mysql-test/r/type_timestamp.result:
  Added test for TIMESTAMP columns which are able to store NULL values.
mysql-test/t/type_timestamp.test:
  Added test for TIMESTAMP columns which are able to store NULL values.
sql/field.cc:
  Added support for TIMESTAMP fields holding NULL values.
  We don't need Field_timestamp::set_timestamp_offsets() anymore.
  Instead we need Field_timestamp::get_auto_set_type() function
  which will convert TIMESTAMP auto-set type stored in Field in 
  unireg_check to value from timestamp_auto_set_type_enum.
  (We can't replace this function with additional Field_timestamp member
  and some code in constructor because then we will have troubles
  with Field::new_field() method).
  We should also set field to not null in Field_timestamp::set_time() now.
sql/field.h:
  Added support for TIMESTAMP fields holding NULL values.
  We don't need Field_timestamp::set_timestamp_offsets() anymore.
  Instead we need Field_timestamp::get_auto_set_type() function,
  which will convert TIMESTAMP auto-set type stored in Field in 
  unireg_check to value from timestamp_auto_set_type_enum.
  We also have to support NULL values in Field_timestamp::get_timestamp()
  function.
sql/field_conv.cc:
  Added comment clarifying behavior in case of TIMESTAMP fields which are
  able to store NULL values.
sql/ha_berkeley.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now for determining 
  if we should auto-set value of TIMESTAMP field during this operation.
  We are also use Field_timestamp::set_time() instead of 
  handler::update_timestamp().
sql/ha_heap.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now for determining 
  if we should auto-set value of TIMESTAMP field during this operation.
  We are also use Field_timestamp::set_time() instead of 
  handler::update_timestamp().
sql/ha_innodb.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now for determining 
  if we should auto-set value of TIMESTAMP field during this operation.
  We are also use Field_timestamp::set_time() instead of 
  handler::update_timestamp().
sql/ha_isam.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now for determining 
  if we should auto-set value of TIMESTAMP field during this operation.
  We are also use Field_timestamp::set_time() instead of 
  handler::update_timestamp().
sql/ha_isammrg.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now for determining 
  if we should auto-set value of TIMESTAMP field during this operation.
  We are also use Field_timestamp::set_time() instead of 
  handler::update_timestamp().
sql/ha_myisam.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now for determining 
  if we should auto-set value of TIMESTAMP field during this operation.
  We are also use Field_timestamp::set_time() instead of 
  handler::update_timestamp().
sql/ha_myisammrg.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now for determining 
  if we should auto-set value of TIMESTAMP field during this operation.
  We are also use Field_timestamp::set_time() instead of 
  handler::update_timestamp().
sql/ha_ndbcluster.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now for determining 
  if we should auto-set value of TIMESTAMP field during this operation.
  We are also use Field_timestamp::set_time() instead of 
  handler::update_timestamp().
sql/handler.cc:
  handler::update_timestamp() is no longer needed since now we use
  Field_timestamp::set_time() instead.
  (we can't use handler::update_timestamp() anyway since field position
  only is not enough for TIMESTAMP fields which are able to store NULLs)
sql/handler.h:
  handler::update_timestamp() is no longer needed since now we use
  Field_timestamp::set_time() instead.
sql/item_timefunc.cc:
  Since now TIMESTAMP fields can hold NULL values we should take this into
  account.
sql/sql_base.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now. 
  (Here we use Field_timestamp::get_auto_set_type() to setup its value
   before further statement execution).
sql/sql_insert.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now.
sql/sql_load.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now.
sql/sql_parse.cc:
  Added support for TIMESTAMP fields holding NULL values.
  We should distinguish NULL default values and non-specified default
  values for such fields (because latter could mean DEFAULT NOW()
  ON UPDATE NOW() in some cases).
sql/sql_show.cc:
  Added support for TIMESTAMP fields holding NULL values.
  Unlike all other fields these are NOT NULL by default
  so we have to specify NULL attribute explicitly for them.
sql/sql_table.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now.
sql/sql_update.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now.
sql/sql_yacc.yy:
  Added support for TIMESTAMP fields holding NULL values.
  Unlike all other fields these are NOT NULL by default
  (so we have to set NOT_NULL_FLAG properly for them).
sql/table.h:
  Added timestamp_auto_set_type enum which values are used for indicating
  during which operations we should automatically set TIMESTAPM field
  value to current timestamp.
  TABLE: Replaced timestamp_default_now/on_update_now members with
  timestamp_auto_set_type flag (Now when TIMESTAMP field are able to 
  store NULL values, single position of field in record is not enough 
  for updating this field anyway).
2004-10-01 18:54:06 +04:00

1602 lines
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/* Copyright (C) 2000,2004 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
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; either version 2 of the License, or
(at your option) any later version.
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 __GNUC__
#pragma implementation // gcc: Class implementation
#endif
#include "mysql_priv.h"
#include <m_ctype.h>
#include <myisampack.h>
#include "ha_myisam.h"
#include <stdarg.h>
#ifndef MASTER
#include "../srclib/myisam/myisamdef.h"
#else
#include "../myisam/myisamdef.h"
#include "../myisam/rt_index.h"
#endif
ulong myisam_recover_options= HA_RECOVER_NONE;
/* bits in myisam_recover_options */
const char *myisam_recover_names[] =
{ "DEFAULT", "BACKUP", "FORCE", "QUICK", NullS};
TYPELIB myisam_recover_typelib= {array_elements(myisam_recover_names)-1,"",
myisam_recover_names};
/*****************************************************************************
** MyISAM tables
*****************************************************************************/
// collect errors printed by mi_check routines
static void mi_check_print_msg(MI_CHECK *param, const char* msg_type,
const char *fmt, va_list args)
{
THD* thd = (THD*)param->thd;
Protocol *protocol= thd->protocol;
uint length, msg_length;
char msgbuf[MI_MAX_MSG_BUF];
char name[NAME_LEN*2+2];
msg_length= my_vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
msgbuf[sizeof(msgbuf) - 1] = 0; // healthy paranoia
DBUG_PRINT(msg_type,("message: %s",msgbuf));
if (!thd->vio_ok())
{
sql_print_error(msgbuf);
return;
}
if (param->testflag & (T_CREATE_MISSING_KEYS | T_SAFE_REPAIR |
T_AUTO_REPAIR))
{
my_message(ER_NOT_KEYFILE,msgbuf,MYF(MY_WME));
return;
}
length=(uint) (strxmov(name, param->db_name,".",param->table_name,NullS) -
name);
protocol->prepare_for_resend();
protocol->store(name, length, system_charset_info);
protocol->store(param->op_name, system_charset_info);
protocol->store(msg_type, system_charset_info);
protocol->store(msgbuf, msg_length, system_charset_info);
if (protocol->write())
sql_print_error("Failed on my_net_write, writing to stderr instead: %s\n",
msgbuf);
return;
}
extern "C" {
volatile my_bool *killed_ptr(MI_CHECK *param)
{
return &(((THD *)(param->thd))->killed);
}
void mi_check_print_error(MI_CHECK *param, const char *fmt,...)
{
param->error_printed|=1;
param->out_flag|= O_DATA_LOST;
va_list args;
va_start(args, fmt);
mi_check_print_msg(param, "error", fmt, args);
va_end(args);
}
void mi_check_print_info(MI_CHECK *param, const char *fmt,...)
{
va_list args;
va_start(args, fmt);
mi_check_print_msg(param, "info", fmt, args);
va_end(args);
}
void mi_check_print_warning(MI_CHECK *param, const char *fmt,...)
{
param->warning_printed=1;
param->out_flag|= O_DATA_LOST;
va_list args;
va_start(args, fmt);
mi_check_print_msg(param, "warning", fmt, args);
va_end(args);
}
}
const char **ha_myisam::bas_ext() const
{ static const char *ext[]= { ".MYI",".MYD", NullS }; return ext; }
const char *ha_myisam::index_type(uint key_number)
{
return ((table->key_info[key_number].flags & HA_FULLTEXT) ?
"FULLTEXT" :
(table->key_info[key_number].flags & HA_SPATIAL) ?
"SPATIAL" :
(table->key_info[key_number].algorithm == HA_KEY_ALG_RTREE) ?
"RTREE" :
"BTREE");
}
#ifdef HAVE_REPLICATION
int ha_myisam::net_read_dump(NET* net)
{
int data_fd = file->dfile;
int error = 0;
my_seek(data_fd, 0L, MY_SEEK_SET, MYF(MY_WME));
for (;;)
{
ulong packet_len = my_net_read(net);
if (!packet_len)
break ; // end of file
if (packet_len == packet_error)
{
sql_print_error("ha_myisam::net_read_dump - read error ");
error= -1;
goto err;
}
if (my_write(data_fd, (byte*)net->read_pos, (uint) packet_len,
MYF(MY_WME|MY_FNABP)))
{
error = errno;
goto err;
}
}
err:
return error;
}
int ha_myisam::dump(THD* thd, int fd)
{
MYISAM_SHARE* share = file->s;
NET* net = &thd->net;
uint blocksize = share->blocksize;
my_off_t bytes_to_read = share->state.state.data_file_length;
int data_fd = file->dfile;
byte * buf = (byte*) my_malloc(blocksize, MYF(MY_WME));
if (!buf)
return ENOMEM;
int error = 0;
my_seek(data_fd, 0L, MY_SEEK_SET, MYF(MY_WME));
for (; bytes_to_read > 0;)
{
uint bytes = my_read(data_fd, buf, blocksize, MYF(MY_WME));
if (bytes == MY_FILE_ERROR)
{
error = errno;
goto err;
}
if (fd >= 0)
{
if (my_write(fd, buf, bytes, MYF(MY_WME | MY_FNABP)))
{
error = errno ? errno : EPIPE;
goto err;
}
}
else
{
if (my_net_write(net, (char*) buf, bytes))
{
error = errno ? errno : EPIPE;
goto err;
}
}
bytes_to_read -= bytes;
}
if (fd < 0)
{
my_net_write(net, "", 0);
net_flush(net);
}
err:
my_free((gptr) buf, MYF(0));
return error;
}
#endif /* HAVE_REPLICATION */
/* Name is here without an extension */
int ha_myisam::open(const char *name, int mode, uint test_if_locked)
{
if (!(file=mi_open(name, mode, test_if_locked)))
return (my_errno ? my_errno : -1);
if (test_if_locked & (HA_OPEN_IGNORE_IF_LOCKED | HA_OPEN_TMP_TABLE))
VOID(mi_extra(file, HA_EXTRA_NO_WAIT_LOCK, 0));
info(HA_STATUS_NO_LOCK | HA_STATUS_VARIABLE | HA_STATUS_CONST);
if (!(test_if_locked & HA_OPEN_WAIT_IF_LOCKED))
VOID(mi_extra(file, HA_EXTRA_WAIT_LOCK, 0));
if (!table->db_record_offset)
int_table_flags|=HA_REC_NOT_IN_SEQ;
if (file->s->options & (HA_OPTION_CHECKSUM | HA_OPTION_COMPRESS_RECORD))
int_table_flags|=HA_HAS_CHECKSUM;
return (0);
}
int ha_myisam::close(void)
{
MI_INFO *tmp=file;
file=0;
return mi_close(tmp);
}
int ha_myisam::write_row(byte * buf)
{
statistic_increment(ha_write_count,&LOCK_status);
/* If we have a timestamp column, update it to the current time */
if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_INSERT)
table->timestamp_field->set_time();
/*
If we have an auto_increment column and we are writing a changed row
or a new row, then update the auto_increment value in the record.
*/
if (table->next_number_field && buf == table->record[0])
update_auto_increment();
return mi_write(file,buf);
}
int ha_myisam::check(THD* thd, HA_CHECK_OPT* check_opt)
{
if (!file) return HA_ADMIN_INTERNAL_ERROR;
int error;
MI_CHECK param;
MYISAM_SHARE* share = file->s;
const char *old_proc_info=thd->proc_info;
thd->proc_info="Checking table";
myisamchk_init(&param);
param.thd = thd;
param.op_name = (char*)"check";
param.db_name = table->table_cache_key;
param.table_name = table->table_name;
param.testflag = check_opt->flags | T_CHECK | T_SILENT;
if (!(table->db_stat & HA_READ_ONLY))
param.testflag|= T_STATISTICS;
param.using_global_keycache = 1;
if (!mi_is_crashed(file) &&
(((param.testflag & T_CHECK_ONLY_CHANGED) &&
!(share->state.changed & (STATE_CHANGED | STATE_CRASHED |
STATE_CRASHED_ON_REPAIR)) &&
share->state.open_count == 0) ||
((param.testflag & T_FAST) && (share->state.open_count ==
(uint) (share->global_changed ? 1 : 0)))))
return HA_ADMIN_ALREADY_DONE;
error = chk_status(&param, file); // Not fatal
error = chk_size(&param, file);
if (!error)
error |= chk_del(&param, file, param.testflag);
if (!error)
error = chk_key(&param, file);
if (!error)
{
if ((!(param.testflag & T_QUICK) &&
((share->options &
(HA_OPTION_PACK_RECORD | HA_OPTION_COMPRESS_RECORD)) ||
(param.testflag & (T_EXTEND | T_MEDIUM)))) ||
mi_is_crashed(file))
{
uint old_testflag=param.testflag;
param.testflag|=T_MEDIUM;
init_io_cache(&param.read_cache, file->dfile,
my_default_record_cache_size, READ_CACHE,
share->pack.header_length, 1, MYF(MY_WME));
error |= chk_data_link(&param, file, param.testflag & T_EXTEND);
end_io_cache(&(param.read_cache));
param.testflag=old_testflag;
}
}
if (!error)
{
if ((share->state.changed & (STATE_CHANGED |
STATE_CRASHED_ON_REPAIR |
STATE_CRASHED | STATE_NOT_ANALYZED)) ||
(param.testflag & T_STATISTICS) ||
mi_is_crashed(file))
{
file->update|=HA_STATE_CHANGED | HA_STATE_ROW_CHANGED;
pthread_mutex_lock(&share->intern_lock);
share->state.changed&= ~(STATE_CHANGED | STATE_CRASHED |
STATE_CRASHED_ON_REPAIR);
if (!(table->db_stat & HA_READ_ONLY))
error=update_state_info(&param,file,UPDATE_TIME | UPDATE_OPEN_COUNT |
UPDATE_STAT);
pthread_mutex_unlock(&share->intern_lock);
info(HA_STATUS_NO_LOCK | HA_STATUS_TIME | HA_STATUS_VARIABLE |
HA_STATUS_CONST);
}
}
else if (!mi_is_crashed(file) && !thd->killed)
{
mi_mark_crashed(file);
file->update |= HA_STATE_CHANGED | HA_STATE_ROW_CHANGED;
}
thd->proc_info=old_proc_info;
return error ? HA_ADMIN_CORRUPT : HA_ADMIN_OK;
}
/*
analyze the key distribution in the table
As the table may be only locked for read, we have to take into account that
two threads may do an analyze at the same time!
*/
int ha_myisam::analyze(THD *thd, HA_CHECK_OPT* check_opt)
{
int error=0;
MI_CHECK param;
MYISAM_SHARE* share = file->s;
myisamchk_init(&param);
param.thd = thd;
param.op_name = (char*) "analyze";
param.db_name = table->table_cache_key;
param.table_name = table->table_name;
param.testflag=(T_FAST | T_CHECK | T_SILENT | T_STATISTICS |
T_DONT_CHECK_CHECKSUM);
param.using_global_keycache = 1;
if (!(share->state.changed & STATE_NOT_ANALYZED))
return HA_ADMIN_ALREADY_DONE;
error = chk_key(&param, file);
if (!error)
{
pthread_mutex_lock(&share->intern_lock);
error=update_state_info(&param,file,UPDATE_STAT);
pthread_mutex_unlock(&share->intern_lock);
}
else if (!mi_is_crashed(file) && !thd->killed)
mi_mark_crashed(file);
return error ? HA_ADMIN_CORRUPT : HA_ADMIN_OK;
}
int ha_myisam::restore(THD* thd, HA_CHECK_OPT *check_opt)
{
HA_CHECK_OPT tmp_check_opt;
char* backup_dir= thd->lex->backup_dir;
char src_path[FN_REFLEN], dst_path[FN_REFLEN];
char* table_name = table->real_name;
int error;
const char* errmsg;
DBUG_ENTER("restore");
if (fn_format_relative_to_data_home(src_path, table_name, backup_dir,
MI_NAME_DEXT))
DBUG_RETURN(HA_ADMIN_INVALID);
if (my_copy(src_path, fn_format(dst_path, table->path, "",
MI_NAME_DEXT, 4), MYF(MY_WME)))
{
error = HA_ADMIN_FAILED;
errmsg = "Failed in my_copy (Error %d)";
goto err;
}
tmp_check_opt.init();
tmp_check_opt.flags |= T_VERY_SILENT | T_CALC_CHECKSUM | T_QUICK;
DBUG_RETURN(repair(thd, &tmp_check_opt));
err:
{
MI_CHECK param;
myisamchk_init(&param);
param.thd = thd;
param.op_name = (char*)"restore";
param.db_name = table->table_cache_key;
param.table_name = table->table_name;
param.testflag = 0;
mi_check_print_error(&param, errmsg, my_errno);
DBUG_RETURN(error);
}
}
int ha_myisam::backup(THD* thd, HA_CHECK_OPT *check_opt)
{
char* backup_dir= thd->lex->backup_dir;
char src_path[FN_REFLEN], dst_path[FN_REFLEN];
char* table_name = table->real_name;
int error;
const char *errmsg;
DBUG_ENTER("ha_myisam::backup");
if (fn_format_relative_to_data_home(dst_path, table_name, backup_dir,
reg_ext))
{
errmsg = "Failed in fn_format() for .frm file (errno: %d)";
error = HA_ADMIN_INVALID;
goto err;
}
if (my_copy(fn_format(src_path, table->path,"", reg_ext, MY_UNPACK_FILENAME),
dst_path,
MYF(MY_WME | MY_HOLD_ORIGINAL_MODES | MY_DONT_OVERWRITE_FILE)))
{
error = HA_ADMIN_FAILED;
errmsg = "Failed copying .frm file (errno: %d)";
goto err;
}
/* Change extension */
if (!fn_format(dst_path, dst_path, "", MI_NAME_DEXT,
MY_REPLACE_EXT | MY_UNPACK_FILENAME | MY_SAFE_PATH))
{
errmsg = "Failed in fn_format() for .MYD file (errno: %d)";
error = HA_ADMIN_INVALID;
goto err;
}
if (my_copy(fn_format(src_path, table->path,"", MI_NAME_DEXT,
MY_UNPACK_FILENAME),
dst_path,
MYF(MY_WME | MY_HOLD_ORIGINAL_MODES | MY_DONT_OVERWRITE_FILE)))
{
errmsg = "Failed copying .MYD file (errno: %d)";
error= HA_ADMIN_FAILED;
goto err;
}
DBUG_RETURN(HA_ADMIN_OK);
err:
{
MI_CHECK param;
myisamchk_init(&param);
param.thd = thd;
param.op_name = (char*)"backup";
param.db_name = table->table_cache_key;
param.table_name = table->table_name;
param.testflag = 0;
mi_check_print_error(&param,errmsg, my_errno);
DBUG_RETURN(error);
}
}
int ha_myisam::repair(THD* thd, HA_CHECK_OPT *check_opt)
{
int error;
MI_CHECK param;
ha_rows start_records;
if (!file) return HA_ADMIN_INTERNAL_ERROR;
myisamchk_init(&param);
param.thd = thd;
param.op_name = (char*) "repair";
param.testflag = ((check_opt->flags & ~(T_EXTEND)) |
T_SILENT | T_FORCE_CREATE | T_CALC_CHECKSUM |
(check_opt->flags & T_EXTEND ? T_REP : T_REP_BY_SORT));
param.sort_buffer_length= check_opt->sort_buffer_size;
start_records=file->state->records;
while ((error=repair(thd,param,0)) && param.retry_repair)
{
param.retry_repair=0;
if (test_all_bits(param.testflag,
(uint) (T_RETRY_WITHOUT_QUICK | T_QUICK)))
{
param.testflag&= ~T_RETRY_WITHOUT_QUICK;
sql_print_information("Retrying repair of: '%s' without quick",
table->path);
continue;
}
param.testflag&= ~T_QUICK;
if ((param.testflag & T_REP_BY_SORT))
{
param.testflag= (param.testflag & ~T_REP_BY_SORT) | T_REP;
sql_print_information("Retrying repair of: '%s' with keycache",
table->path);
continue;
}
break;
}
if (!error && start_records != file->state->records &&
!(check_opt->flags & T_VERY_SILENT))
{
char llbuff[22],llbuff2[22];
sql_print_information("Found %s of %s rows when repairing '%s'",
llstr(file->state->records, llbuff),
llstr(start_records, llbuff2),
table->path);
}
return error;
}
int ha_myisam::optimize(THD* thd, HA_CHECK_OPT *check_opt)
{
if (!file) return HA_ADMIN_INTERNAL_ERROR;
MI_CHECK param;
myisamchk_init(&param);
param.thd = thd;
param.op_name = (char*) "optimize";
param.testflag = (check_opt->flags | T_SILENT | T_FORCE_CREATE |
T_REP_BY_SORT | T_STATISTICS | T_SORT_INDEX);
param.sort_buffer_length= check_opt->sort_buffer_size;
return repair(thd,param,1);
}
int ha_myisam::repair(THD *thd, MI_CHECK &param, bool optimize)
{
int error=0;
uint local_testflag=param.testflag;
bool optimize_done= !optimize, statistics_done=0;
const char *old_proc_info=thd->proc_info;
char fixed_name[FN_REFLEN];
MYISAM_SHARE* share = file->s;
ha_rows rows= file->state->records;
DBUG_ENTER("ha_myisam::repair");
param.db_name = table->table_cache_key;
param.table_name = table->table_name;
param.tmpfile_createflag = O_RDWR | O_TRUNC;
param.using_global_keycache = 1;
param.thd=thd;
param.tmpdir=&mysql_tmpdir_list;
param.out_flag=0;
strmov(fixed_name,file->filename);
// Don't lock tables if we have used LOCK TABLE
if (!thd->locked_tables &&
mi_lock_database(file, table->tmp_table ? F_EXTRA_LCK : F_WRLCK))
{
mi_check_print_error(&param,ER(ER_CANT_LOCK),my_errno);
DBUG_RETURN(HA_ADMIN_FAILED);
}
if (!optimize ||
((file->state->del || share->state.split != file->state->records) &&
(!(param.testflag & T_QUICK) ||
!(share->state.changed & STATE_NOT_OPTIMIZED_KEYS))))
{
ulonglong key_map= ((local_testflag & T_CREATE_MISSING_KEYS) ?
((ulonglong) 1L << share->base.keys)-1 :
share->state.key_map);
uint testflag=param.testflag;
if (mi_test_if_sort_rep(file,file->state->records,key_map,0) &&
(local_testflag & T_REP_BY_SORT))
{
local_testflag|= T_STATISTICS;
param.testflag|= T_STATISTICS; // We get this for free
statistics_done=1;
if (current_thd->variables.myisam_repair_threads>1)
{
char buf[40];
/* TODO: respect myisam_repair_threads variable */
my_snprintf(buf, 40, "Repair with %d threads", my_count_bits(key_map));
thd->proc_info=buf;
error = mi_repair_parallel(&param, file, fixed_name,
param.testflag & T_QUICK);
thd->proc_info="Repair done"; // to reset proc_info, as
// it was pointing to local buffer
}
else
{
thd->proc_info="Repair by sorting";
error = mi_repair_by_sort(&param, file, fixed_name,
param.testflag & T_QUICK);
}
}
else
{
thd->proc_info="Repair with keycache";
param.testflag &= ~T_REP_BY_SORT;
error= mi_repair(&param, file, fixed_name,
param.testflag & T_QUICK);
}
param.testflag=testflag;
optimize_done=1;
}
if (!error)
{
if ((local_testflag & T_SORT_INDEX) &&
(share->state.changed & STATE_NOT_SORTED_PAGES))
{
optimize_done=1;
thd->proc_info="Sorting index";
error=mi_sort_index(&param,file,fixed_name);
}
if (!statistics_done && (local_testflag & T_STATISTICS))
{
if (share->state.changed & STATE_NOT_ANALYZED)
{
optimize_done=1;
thd->proc_info="Analyzing";
error = chk_key(&param, file);
}
else
local_testflag&= ~T_STATISTICS; // Don't update statistics
}
}
thd->proc_info="Saving state";
if (!error)
{
if ((share->state.changed & STATE_CHANGED) || mi_is_crashed(file))
{
share->state.changed&= ~(STATE_CHANGED | STATE_CRASHED |
STATE_CRASHED_ON_REPAIR);
file->update|=HA_STATE_CHANGED | HA_STATE_ROW_CHANGED;
}
/*
the following 'if', thought conceptually wrong,
is a useful optimization nevertheless.
*/
if (file->state != &file->s->state.state)
file->s->state.state = *file->state;
if (file->s->base.auto_key)
update_auto_increment_key(&param, file, 1);
if (optimize_done)
error = update_state_info(&param, file,
UPDATE_TIME | UPDATE_OPEN_COUNT |
(local_testflag &
T_STATISTICS ? UPDATE_STAT : 0));
info(HA_STATUS_NO_LOCK | HA_STATUS_TIME | HA_STATUS_VARIABLE |
HA_STATUS_CONST);
if (rows != file->state->records && ! (param.testflag & T_VERY_SILENT))
{
char llbuff[22],llbuff2[22];
mi_check_print_warning(&param,"Number of rows changed from %s to %s",
llstr(rows,llbuff),
llstr(file->state->records,llbuff2));
}
}
else
{
mi_mark_crashed_on_repair(file);
file->update |= HA_STATE_CHANGED | HA_STATE_ROW_CHANGED;
update_state_info(&param, file, 0);
}
thd->proc_info=old_proc_info;
if (!thd->locked_tables)
mi_lock_database(file,F_UNLCK);
DBUG_RETURN(error ? HA_ADMIN_FAILED :
!optimize_done ? HA_ADMIN_ALREADY_DONE : HA_ADMIN_OK);
}
/*
Assign table indexes to a specific key cache.
*/
int ha_myisam::assign_to_keycache(THD* thd, HA_CHECK_OPT *check_opt)
{
KEY_CACHE *new_key_cache= check_opt->key_cache;
const char *errmsg= 0;
int error= HA_ADMIN_OK;
ulonglong map= ~(ulonglong) 0;
TABLE_LIST *table_list= table->pos_in_table_list;
DBUG_ENTER("ha_myisam::assign_to_keycache");
/* Check validity of the index references */
if (table_list->use_index)
{
/* We only come here when the user did specify an index map */
key_map kmap;
if (get_key_map_from_key_list(&kmap, table, table_list->use_index))
{
errmsg= thd->net.last_error;
error= HA_ADMIN_FAILED;
goto err;
}
map= kmap.to_ulonglong();
}
if ((error= mi_assign_to_key_cache(file, map, new_key_cache)))
{
char buf[80];
my_snprintf(buf, sizeof(buf),
"Failed to flush to index file (errno: %d)", error);
errmsg= buf;
error= HA_ADMIN_CORRUPT;
}
err:
if (error != HA_ADMIN_OK)
{
/* Send error to user */
MI_CHECK param;
myisamchk_init(&param);
param.thd= thd;
param.op_name= (char*)"assign_to_keycache";
param.db_name= table->table_cache_key;
param.table_name= table->table_name;
param.testflag= 0;
mi_check_print_error(&param, errmsg);
}
DBUG_RETURN(error);
}
/*
Preload pages of the index file for a table into the key cache.
*/
int ha_myisam::preload_keys(THD* thd, HA_CHECK_OPT *check_opt)
{
int error;
const char *errmsg;
ulonglong map= ~(ulonglong) 0;
TABLE_LIST *table_list= table->pos_in_table_list;
my_bool ignore_leaves= table_list->ignore_leaves;
DBUG_ENTER("ha_myisam::preload_keys");
/* Check validity of the index references */
if (table_list->use_index)
{
key_map kmap;
get_key_map_from_key_list(&kmap, table, table_list->use_index);
if (kmap.is_set_all())
{
errmsg= thd->net.last_error;
error= HA_ADMIN_FAILED;
goto err;
}
if (!kmap.is_clear_all())
map= kmap.to_ulonglong();
}
mi_extra(file, HA_EXTRA_PRELOAD_BUFFER_SIZE,
(void *) &thd->variables.preload_buff_size);
if ((error= mi_preload(file, map, ignore_leaves)))
{
switch (error) {
case HA_ERR_NON_UNIQUE_BLOCK_SIZE:
errmsg= "Indexes use different block sizes";
break;
case HA_ERR_OUT_OF_MEM:
errmsg= "Failed to allocate buffer";
break;
default:
char buf[ERRMSGSIZE+20];
my_snprintf(buf, ERRMSGSIZE,
"Failed to read from index file (errno: %d)", my_errno);
errmsg= buf;
}
error= HA_ADMIN_FAILED;
goto err;
}
DBUG_RETURN(HA_ADMIN_OK);
err:
{
MI_CHECK param;
myisamchk_init(&param);
param.thd= thd;
param.op_name= (char*)"preload_keys";
param.db_name= table->table_cache_key;
param.table_name= table->table_name;
param.testflag= 0;
mi_check_print_error(&param, errmsg);
DBUG_RETURN(error);
}
}
/*
Disable indexes, making it persistent if requested.
SYNOPSIS
disable_indexes()
mode mode of operation:
HA_KEY_SWITCH_NONUNIQ disable all non-unique keys
HA_KEY_SWITCH_ALL disable all keys
HA_KEY_SWITCH_NONUNIQ_SAVE dis. non-uni. and make persistent
HA_KEY_SWITCH_ALL_SAVE dis. all keys and make persistent
IMPLEMENTATION
HA_KEY_SWITCH_NONUNIQ is not implemented.
HA_KEY_SWITCH_ALL_SAVE is not implemented.
RETURN
0 ok
HA_ERR_WRONG_COMMAND mode not implemented.
*/
int ha_myisam::disable_indexes(uint mode)
{
int error;
if (mode == HA_KEY_SWITCH_ALL)
{
/* call a storage engine function to switch the key map */
error= mi_disable_indexes(file);
}
else if (mode == HA_KEY_SWITCH_NONUNIQ_SAVE)
{
mi_extra(file, HA_EXTRA_NO_KEYS, 0);
info(HA_STATUS_CONST); // Read new key info
error= 0;
}
else
{
/* mode not implemented */
error= HA_ERR_WRONG_COMMAND;
}
return error;
}
/*
Enable indexes, making it persistent if requested.
SYNOPSIS
enable_indexes()
mode mode of operation:
HA_KEY_SWITCH_NONUNIQ enable all non-unique keys
HA_KEY_SWITCH_ALL enable all keys
HA_KEY_SWITCH_NONUNIQ_SAVE en. non-uni. and make persistent
HA_KEY_SWITCH_ALL_SAVE en. all keys and make persistent
DESCRIPTION
Enable indexes, which might have been disabled by disable_index() before.
The modes without _SAVE work only if both data and indexes are empty,
since the MyISAM repair would enable them persistently.
To be sure in these cases, call handler::delete_all_rows() before.
IMPLEMENTATION
HA_KEY_SWITCH_NONUNIQ is not implemented.
HA_KEY_SWITCH_ALL_SAVE is not implemented.
RETURN
0 ok
!=0 Error, among others:
HA_ERR_CRASHED data or index is non-empty. Delete all rows and retry.
HA_ERR_WRONG_COMMAND mode not implemented.
*/
int ha_myisam::enable_indexes(uint mode)
{
int error;
if (file->s->state.key_map == set_bits(ulonglong, file->s->base.keys))
{
/* All indexes are enabled already. */
return 0;
}
if (mode == HA_KEY_SWITCH_ALL)
{
error= mi_enable_indexes(file);
/*
Do not try to repair on error,
as this could make the enabled state persistent,
but mode==HA_KEY_SWITCH_ALL forbids it.
*/
}
else if (mode == HA_KEY_SWITCH_NONUNIQ_SAVE)
{
THD *thd=current_thd;
MI_CHECK param;
const char *save_proc_info=thd->proc_info;
thd->proc_info="Creating index";
myisamchk_init(&param);
param.op_name = (char*) "recreating_index";
param.testflag = (T_SILENT | T_REP_BY_SORT | T_QUICK |
T_CREATE_MISSING_KEYS);
param.myf_rw&= ~MY_WAIT_IF_FULL;
param.sort_buffer_length= thd->variables.myisam_sort_buff_size;
param.tmpdir=&mysql_tmpdir_list;
error=repair(thd,param,0) != HA_ADMIN_OK;
info(HA_STATUS_CONST);
thd->proc_info=save_proc_info;
}
else
{
/* mode not implemented */
error= HA_ERR_WRONG_COMMAND;
}
return error;
}
/*
Test if indexes are disabled.
SYNOPSIS
indexes_are_disabled()
no parameters
RETURN
0 indexes are not disabled
1 all indexes are disabled
[2 non-unique indexes are disabled - NOT YET IMPLEMENTED]
*/
int ha_myisam::indexes_are_disabled(void)
{
return mi_indexes_are_disabled(file);
}
/*
prepare for a many-rows insert operation
e.g. - disable indexes (if they can be recreated fast) or
activate special bulk-insert optimizations
SYNOPSIS
start_bulk_insert(rows)
rows Rows to be inserted
0 if we don't know
NOTICE
Do not forget to call end_bulk_insert() later!
*/
void ha_myisam::start_bulk_insert(ha_rows rows)
{
DBUG_ENTER("ha_myisam::start_bulk_insert");
THD *thd=current_thd;
ulong size= min(thd->variables.read_buff_size, table->avg_row_length*rows);
DBUG_PRINT("info",("start_bulk_insert: rows %lu size %lu",
(ulong) rows, size));
/* don't enable row cache if too few rows */
if (! rows || (rows > MI_MIN_ROWS_TO_USE_WRITE_CACHE))
mi_extra(file, HA_EXTRA_WRITE_CACHE, (void*) &size);
can_enable_indexes= (file->s->state.key_map ==
set_bits(ulonglong, file->s->base.keys));
if (!(specialflag & SPECIAL_SAFE_MODE))
{
/*
Only disable old index if the table was empty and we are inserting
a lot of rows.
We should not do this for only a few rows as this is slower and
we don't want to update the key statistics based of only a few rows.
*/
if (file->state->records == 0 && can_enable_indexes &&
(!rows || rows >= MI_MIN_ROWS_TO_DISABLE_INDEXES))
mi_disable_non_unique_index(file,rows);
else
if (!file->bulk_insert &&
(!rows || rows >= MI_MIN_ROWS_TO_USE_BULK_INSERT))
{
mi_init_bulk_insert(file, thd->variables.bulk_insert_buff_size, rows);
}
}
DBUG_VOID_RETURN;
}
/*
end special bulk-insert optimizations,
which have been activated by start_bulk_insert().
SYNOPSIS
end_bulk_insert()
no arguments
RETURN
0 OK
!= 0 Error
*/
int ha_myisam::end_bulk_insert()
{
mi_end_bulk_insert(file);
int err=mi_extra(file, HA_EXTRA_NO_CACHE, 0);
return err ? err : can_enable_indexes ?
enable_indexes(HA_KEY_SWITCH_NONUNIQ_SAVE) : 0;
}
bool ha_myisam::check_and_repair(THD *thd)
{
int error=0;
int marked_crashed;
char *old_query;
uint old_query_length;
HA_CHECK_OPT check_opt;
DBUG_ENTER("ha_myisam::check_and_repair");
check_opt.init();
check_opt.flags= T_MEDIUM | T_AUTO_REPAIR;
// Don't use quick if deleted rows
if (!file->state->del && (myisam_recover_options & HA_RECOVER_QUICK))
check_opt.flags|=T_QUICK;
sql_print_warning("Checking table: '%s'",table->path);
old_query= thd->query;
old_query_length= thd->query_length;
pthread_mutex_lock(&LOCK_thread_count);
thd->query= table->real_name;
thd->query_length= strlen(table->real_name);
pthread_mutex_unlock(&LOCK_thread_count);
if ((marked_crashed= mi_is_crashed(file)) || check(thd, &check_opt))
{
sql_print_warning("Recovering table: '%s'",table->path);
check_opt.flags=
((myisam_recover_options & HA_RECOVER_BACKUP ? T_BACKUP_DATA : 0) |
(marked_crashed ? 0 : T_QUICK) |
(myisam_recover_options & HA_RECOVER_FORCE ? 0 : T_SAFE_REPAIR) |
T_AUTO_REPAIR);
if (repair(thd, &check_opt))
error=1;
}
pthread_mutex_lock(&LOCK_thread_count);
thd->query= old_query;
thd->query_length= old_query_length;
pthread_mutex_unlock(&LOCK_thread_count);
DBUG_RETURN(error);
}
bool ha_myisam::is_crashed() const
{
return (file->s->state.changed & STATE_CRASHED ||
(my_disable_locking && file->s->state.open_count));
}
int ha_myisam::update_row(const byte * old_data, byte * new_data)
{
statistic_increment(ha_update_count,&LOCK_status);
if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_UPDATE)
table->timestamp_field->set_time();
return mi_update(file,old_data,new_data);
}
int ha_myisam::delete_row(const byte * buf)
{
statistic_increment(ha_delete_count,&LOCK_status);
return mi_delete(file,buf);
}
int ha_myisam::index_read(byte * buf, const byte * key,
uint key_len, enum ha_rkey_function find_flag)
{
DBUG_ASSERT(inited==INDEX);
statistic_increment(ha_read_key_count,&LOCK_status);
int error=mi_rkey(file,buf,active_index, key, key_len, find_flag);
table->status=error ? STATUS_NOT_FOUND: 0;
return error;
}
int ha_myisam::index_read_idx(byte * buf, uint index, const byte * key,
uint key_len, enum ha_rkey_function find_flag)
{
statistic_increment(ha_read_key_count,&LOCK_status);
int error=mi_rkey(file,buf,index, key, key_len, find_flag);
table->status=error ? STATUS_NOT_FOUND: 0;
return error;
}
int ha_myisam::index_read_last(byte * buf, const byte * key, uint key_len)
{
DBUG_ASSERT(inited==INDEX);
statistic_increment(ha_read_key_count,&LOCK_status);
int error=mi_rkey(file,buf,active_index, key, key_len, HA_READ_PREFIX_LAST);
table->status=error ? STATUS_NOT_FOUND: 0;
return error;
}
int ha_myisam::index_next(byte * buf)
{
DBUG_ASSERT(inited==INDEX);
statistic_increment(ha_read_next_count,&LOCK_status);
int error=mi_rnext(file,buf,active_index);
table->status=error ? STATUS_NOT_FOUND: 0;
return error;
}
int ha_myisam::index_prev(byte * buf)
{
DBUG_ASSERT(inited==INDEX);
statistic_increment(ha_read_prev_count,&LOCK_status);
int error=mi_rprev(file,buf, active_index);
table->status=error ? STATUS_NOT_FOUND: 0;
return error;
}
int ha_myisam::index_first(byte * buf)
{
DBUG_ASSERT(inited==INDEX);
statistic_increment(ha_read_first_count,&LOCK_status);
int error=mi_rfirst(file, buf, active_index);
table->status=error ? STATUS_NOT_FOUND: 0;
return error;
}
int ha_myisam::index_last(byte * buf)
{
DBUG_ASSERT(inited==INDEX);
statistic_increment(ha_read_last_count,&LOCK_status);
int error=mi_rlast(file, buf, active_index);
table->status=error ? STATUS_NOT_FOUND: 0;
return error;
}
int ha_myisam::index_next_same(byte * buf,
const byte *key __attribute__((unused)),
uint length __attribute__((unused)))
{
DBUG_ASSERT(inited==INDEX);
statistic_increment(ha_read_next_count,&LOCK_status);
int error=mi_rnext_same(file,buf);
table->status=error ? STATUS_NOT_FOUND: 0;
return error;
}
int ha_myisam::rnd_init(bool scan)
{
if (scan)
return mi_scan_init(file);
return mi_extra(file, HA_EXTRA_RESET, 0);
}
int ha_myisam::rnd_next(byte *buf)
{
statistic_increment(ha_read_rnd_next_count,&LOCK_status);
int error=mi_scan(file, buf);
table->status=error ? STATUS_NOT_FOUND: 0;
return error;
}
int ha_myisam::restart_rnd_next(byte *buf, byte *pos)
{
return rnd_pos(buf,pos);
}
int ha_myisam::rnd_pos(byte * buf, byte *pos)
{
statistic_increment(ha_read_rnd_count,&LOCK_status);
int error=mi_rrnd(file, buf, ha_get_ptr(pos,ref_length));
table->status=error ? STATUS_NOT_FOUND: 0;
return error;
}
void ha_myisam::position(const byte* record)
{
my_off_t position=mi_position(file);
ha_store_ptr(ref, ref_length, position);
}
void ha_myisam::info(uint flag)
{
MI_ISAMINFO info;
char name_buff[FN_REFLEN];
(void) mi_status(file,&info,flag);
if (flag & HA_STATUS_VARIABLE)
{
records = info.records;
deleted = info.deleted;
data_file_length=info.data_file_length;
index_file_length=info.index_file_length;
delete_length = info.delete_length;
check_time = info.check_time;
mean_rec_length=info.mean_reclength;
}
if (flag & HA_STATUS_CONST)
{
max_data_file_length=info.max_data_file_length;
max_index_file_length=info.max_index_file_length;
create_time = info.create_time;
sortkey = info.sortkey;
ref_length=info.reflength;
table->db_options_in_use = info.options;
block_size=myisam_block_size;
table->keys_in_use.set_prefix(table->keys);
table->keys_in_use.intersect(info.key_map);
table->keys_for_keyread= table->keys_in_use;
table->keys_for_keyread.subtract(table->read_only_keys);
table->db_record_offset=info.record_offset;
if (table->key_parts)
memcpy((char*) table->key_info[0].rec_per_key,
(char*) info.rec_per_key,
sizeof(table->key_info[0].rec_per_key)*table->key_parts);
raid_type=info.raid_type;
raid_chunks=info.raid_chunks;
raid_chunksize=info.raid_chunksize;
/*
Set data_file_name and index_file_name to point at the symlink value
if table is symlinked (Ie; Real name is not same as generated name)
*/
data_file_name=index_file_name=0;
fn_format(name_buff, file->filename, "", MI_NAME_DEXT, 2);
if (strcmp(name_buff, info.data_file_name))
data_file_name=info.data_file_name;
strmov(fn_ext(name_buff),MI_NAME_IEXT);
if (strcmp(name_buff, info.index_file_name))
index_file_name=info.index_file_name;
}
if (flag & HA_STATUS_ERRKEY)
{
errkey = info.errkey;
ha_store_ptr(dupp_ref, ref_length, info.dupp_key_pos);
}
if (flag & HA_STATUS_TIME)
update_time = info.update_time;
if (flag & HA_STATUS_AUTO)
auto_increment_value= info.auto_increment;
}
int ha_myisam::extra(enum ha_extra_function operation)
{
if ((specialflag & SPECIAL_SAFE_MODE) && operation == HA_EXTRA_KEYREAD)
return 0;
return mi_extra(file, operation, 0);
}
/* To be used with WRITE_CACHE and EXTRA_CACHE */
int ha_myisam::extra_opt(enum ha_extra_function operation, ulong cache_size)
{
if ((specialflag & SPECIAL_SAFE_MODE) && operation == HA_EXTRA_WRITE_CACHE)
return 0;
return mi_extra(file, operation, (void*) &cache_size);
}
int ha_myisam::delete_all_rows()
{
return mi_delete_all_rows(file);
}
int ha_myisam::delete_table(const char *name)
{
return mi_delete_table(name);
}
int ha_myisam::external_lock(THD *thd, int lock_type)
{
return mi_lock_database(file, !table->tmp_table ?
lock_type : ((lock_type == F_UNLCK) ?
F_UNLCK : F_EXTRA_LCK));
}
THR_LOCK_DATA **ha_myisam::store_lock(THD *thd,
THR_LOCK_DATA **to,
enum thr_lock_type lock_type)
{
if (lock_type != TL_IGNORE && file->lock.type == TL_UNLOCK)
file->lock.type=lock_type;
*to++= &file->lock;
return to;
}
void ha_myisam::update_create_info(HA_CREATE_INFO *create_info)
{
ha_myisam::info(HA_STATUS_AUTO | HA_STATUS_CONST);
if (!(create_info->used_fields & HA_CREATE_USED_AUTO))
{
create_info->auto_increment_value=auto_increment_value;
}
if (!(create_info->used_fields & HA_CREATE_USED_RAID))
{
create_info->raid_type= raid_type;
create_info->raid_chunks= raid_chunks;
create_info->raid_chunksize= raid_chunksize;
}
create_info->data_file_name=data_file_name;
create_info->index_file_name=index_file_name;
}
int ha_myisam::create(const char *name, register TABLE *table_arg,
HA_CREATE_INFO *info)
{
int error;
uint i,j,recpos,minpos,fieldpos,temp_length,length;
bool found_real_auto_increment=0;
enum ha_base_keytype type;
char buff[FN_REFLEN];
KEY *pos;
MI_KEYDEF *keydef;
MI_COLUMNDEF *recinfo,*recinfo_pos;
HA_KEYSEG *keyseg;
uint options=table_arg->db_options_in_use;
DBUG_ENTER("ha_myisam::create");
type=HA_KEYTYPE_BINARY; // Keep compiler happy
if (!(my_multi_malloc(MYF(MY_WME),
&recinfo,(table_arg->fields*2+2)*sizeof(MI_COLUMNDEF),
&keydef, table_arg->keys*sizeof(MI_KEYDEF),
&keyseg,
((table_arg->key_parts + table_arg->keys) *
sizeof(HA_KEYSEG)),
NullS)))
DBUG_RETURN(HA_ERR_OUT_OF_MEM);
pos=table_arg->key_info;
for (i=0; i < table_arg->keys ; i++, pos++)
{
keydef[i].flag= (pos->flags & (HA_NOSAME | HA_FULLTEXT | HA_SPATIAL));
keydef[i].key_alg= pos->algorithm == HA_KEY_ALG_UNDEF ?
(pos->flags & HA_SPATIAL ? HA_KEY_ALG_RTREE : HA_KEY_ALG_BTREE) :
pos->algorithm;
keydef[i].seg=keyseg;
keydef[i].keysegs=pos->key_parts;
for (j=0 ; j < pos->key_parts ; j++)
{
keydef[i].seg[j].flag=pos->key_part[j].key_part_flag;
Field *field=pos->key_part[j].field;
type=field->key_type();
if (options & HA_OPTION_PACK_KEYS ||
(pos->flags & (HA_PACK_KEY | HA_BINARY_PACK_KEY |
HA_SPACE_PACK_USED)))
{
if (pos->key_part[j].length > 8 &&
(type == HA_KEYTYPE_TEXT ||
type == HA_KEYTYPE_NUM ||
(type == HA_KEYTYPE_BINARY && !field->zero_pack())))
{
/* No blobs here */
if (j == 0)
keydef[i].flag|=HA_PACK_KEY;
if (!(field->flags & ZEROFILL_FLAG) &&
(field->type() == FIELD_TYPE_STRING ||
field->type() == FIELD_TYPE_VAR_STRING ||
((int) (pos->key_part[j].length - field->decimals()))
>= 4))
keydef[i].seg[j].flag|=HA_SPACE_PACK;
}
else if (j == 0 && (!(pos->flags & HA_NOSAME) || pos->key_length > 16))
keydef[i].flag|= HA_BINARY_PACK_KEY;
}
keydef[i].seg[j].type= (int) type;
keydef[i].seg[j].start= pos->key_part[j].offset;
keydef[i].seg[j].length= pos->key_part[j].length;
keydef[i].seg[j].bit_start=keydef[i].seg[j].bit_end=0;
keydef[i].seg[j].language = field->charset()->number;
if (field->null_ptr)
{
keydef[i].seg[j].null_bit=field->null_bit;
keydef[i].seg[j].null_pos= (uint) (field->null_ptr-
(uchar*) table_arg->record[0]);
}
else
{
keydef[i].seg[j].null_bit=0;
keydef[i].seg[j].null_pos=0;
}
if (field->type() == FIELD_TYPE_BLOB ||
field->type() == FIELD_TYPE_GEOMETRY)
{
keydef[i].seg[j].flag|=HA_BLOB_PART;
/* save number of bytes used to pack length */
keydef[i].seg[j].bit_start= (uint) (field->pack_length() -
table_arg->blob_ptr_size);
}
}
keyseg+=pos->key_parts;
}
if (table_arg->found_next_number_field)
{
keydef[table_arg->next_number_index].flag|= HA_AUTO_KEY;
found_real_auto_increment= table_arg->next_number_key_offset == 0;
}
recpos=0; recinfo_pos=recinfo;
while (recpos < (uint) table_arg->reclength)
{
Field **field,*found=0;
minpos=table_arg->reclength; length=0;
for (field=table_arg->field ; *field ; field++)
{
if ((fieldpos=(*field)->offset()) >= recpos &&
fieldpos <= minpos)
{
/* skip null fields */
if (!(temp_length= (*field)->pack_length()))
continue; /* Skip null-fields */
if (! found || fieldpos < minpos ||
(fieldpos == minpos && temp_length < length))
{
minpos=fieldpos; found= *field; length=temp_length;
}
}
}
DBUG_PRINT("loop",("found: %lx recpos: %d minpos: %d length: %d",
found,recpos,minpos,length));
if (recpos != minpos)
{ // Reserved space (Null bits?)
bzero((char*) recinfo_pos,sizeof(*recinfo_pos));
recinfo_pos->type=(int) FIELD_NORMAL;
recinfo_pos++->length= (uint16) (minpos-recpos);
}
if (! found)
break;
if (found->flags & BLOB_FLAG)
{
recinfo_pos->type= (int) FIELD_BLOB;
}
else if (!(options & HA_OPTION_PACK_RECORD))
recinfo_pos->type= (int) FIELD_NORMAL;
else if (found->zero_pack())
recinfo_pos->type= (int) FIELD_SKIP_ZERO;
else
recinfo_pos->type= (int) ((length <= 3 ||
(found->flags & ZEROFILL_FLAG)) ?
FIELD_NORMAL :
found->type() == FIELD_TYPE_STRING ||
found->type() == FIELD_TYPE_VAR_STRING ?
FIELD_SKIP_ENDSPACE :
FIELD_SKIP_PRESPACE);
if (found->null_ptr)
{
recinfo_pos->null_bit=found->null_bit;
recinfo_pos->null_pos= (uint) (found->null_ptr-
(uchar*) table_arg->record[0]);
}
else
{
recinfo_pos->null_bit=0;
recinfo_pos->null_pos=0;
}
(recinfo_pos++) ->length=(uint16) length;
recpos=minpos+length;
DBUG_PRINT("loop",("length: %d type: %d",
recinfo_pos[-1].length,recinfo_pos[-1].type));
}
MI_CREATE_INFO create_info;
bzero((char*) &create_info,sizeof(create_info));
create_info.max_rows=table_arg->max_rows;
create_info.reloc_rows=table_arg->min_rows;
create_info.with_auto_increment=found_real_auto_increment;
create_info.auto_increment=(info->auto_increment_value ?
info->auto_increment_value -1 :
(ulonglong) 0);
create_info.data_file_length= ((ulonglong) table_arg->max_rows *
table_arg->avg_row_length);
create_info.raid_type=info->raid_type;
create_info.raid_chunks= (info->raid_chunks ? info->raid_chunks :
RAID_DEFAULT_CHUNKS);
create_info.raid_chunksize=(info->raid_chunksize ? info->raid_chunksize :
RAID_DEFAULT_CHUNKSIZE);
create_info.data_file_name= info->data_file_name;
create_info.index_file_name=info->index_file_name;
/* TODO: Check that the following fn_format is really needed */
error=mi_create(fn_format(buff,name,"","",2+4),
table_arg->keys,keydef,
(uint) (recinfo_pos-recinfo), recinfo,
0, (MI_UNIQUEDEF*) 0,
&create_info,
(((options & HA_OPTION_PACK_RECORD) ? HA_PACK_RECORD : 0) |
((options & HA_OPTION_CHECKSUM) ? HA_CREATE_CHECKSUM : 0) |
((options & HA_OPTION_DELAY_KEY_WRITE) ?
HA_CREATE_DELAY_KEY_WRITE : 0)));
my_free((gptr) recinfo,MYF(0));
DBUG_RETURN(error);
}
int ha_myisam::rename_table(const char * from, const char * to)
{
return mi_rename(from,to);
}
longlong ha_myisam::get_auto_increment()
{
if (!table->next_number_key_offset)
{ // Autoincrement at key-start
ha_myisam::info(HA_STATUS_AUTO);
return auto_increment_value;
}
/* it's safe to call the following if bulk_insert isn't on */
mi_flush_bulk_insert(file, table->next_number_index);
longlong nr;
int error;
byte key[MI_MAX_KEY_LENGTH];
(void) extra(HA_EXTRA_KEYREAD);
key_copy(key,table,table->next_number_index,
table->next_number_key_offset);
error=mi_rkey(file,table->record[1],(int) table->next_number_index,
key,table->next_number_key_offset,HA_READ_PREFIX_LAST);
if (error)
nr=1;
else
nr=(longlong)
table->next_number_field->val_int_offset(table->rec_buff_length)+1;
extra(HA_EXTRA_NO_KEYREAD);
return nr;
}
/*
Find out how many rows there is in the given range
SYNOPSIS
records_in_range()
inx Index to use
min_key Start of range. Null pointer if from first key
max_key End of range. Null pointer if to last key
NOTES
min_key.flag can have one of the following values:
HA_READ_KEY_EXACT Include the key in the range
HA_READ_AFTER_KEY Don't include key in range
max_key.flag can have one of the following values:
HA_READ_BEFORE_KEY Don't include key in range
HA_READ_AFTER_KEY Include all 'end_key' values in the range
RETURN
HA_POS_ERROR Something is wrong with the index tree.
0 There is no matching keys in the given range
number > 0 There is approximately 'number' matching rows in
the range.
*/
ha_rows ha_myisam::records_in_range(uint inx, key_range *min_key,
key_range *max_key)
{
return (ha_rows) mi_records_in_range(file, (int) inx, min_key, max_key);
}
int ha_myisam::ft_read(byte * buf)
{
int error;
if (!ft_handler)
return -1;
thread_safe_increment(ha_read_next_count,&LOCK_status); // why ?
error=ft_handler->please->read_next(ft_handler,(char*) buf);
table->status=error ? STATUS_NOT_FOUND: 0;
return error;
}
uint ha_myisam::checksum() const
{
return (uint)file->s->state.checksum;
}
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