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mariadb/sql/ha_myisam.cc
unknown 32b28f9298 WL#1266 "Separate auto-set logic from TIMESTAMP type." 
Final version of patch.

Adds support for specifying of DEFAULT NOW() and/or ON UPDATE NOW()
clauses for TIMESTAMP field definition.
Current implementation allows only one such field per table and
uses several unireg types for storing info about this properties of
field. It should be replaced with better implementation when new
.frm format is introduced.


include/mysqld_error.h:
  Added error codes for case when we have more than one column with NOW()
  in DEFAULT or ON UPDATE clauses and for case when we are using ON UPDATE
  clause with wrong type.
mysql-test/r/create.result:
  Added tests for using of DEFAULT NOW() and ON UPDATE NOW() with
  non-TIMESTAMP fields.
mysql-test/r/show_check.result:
  Updated test results to reflect new default look of TIMESTAMP fields
  in SHOW CREATE TABLE.
mysql-test/r/system_mysql_db.result:
  Updated test results to reflect new default look of TIMESTAMP fields
  in SHOW CREATE TABLE.
mysql-test/r/type_ranges.result:
  Updated test results to reflect new default look of TIMESTAMP fields
  in SHOW COLUMNS.
mysql-test/r/type_timestamp.result:
  Added tests for various DEFAULT and ON UPDATE clauses for TIMESTAMP
  fields definitions.
mysql-test/t/create.test:
  Added tests for using of DEFAULT NOW() and ON UPDATE NOW() with
  non-TIMESTAMP fields.
mysql-test/t/type_timestamp.test:
  Added tests for various DEFAULT and ON UPDATE clauses for TIMESTAMP
  fields definitions.
sql/field.cc:
  Added support for various combinations of DEFAULT and ON UPDATE clauses
  for TIMESTAMP field. 
  
  Setting TABLE::timestamp* members for TIMESTAMP fields with auto-set 
  option taking into account their unireg type (which corresponds to 
  various DEFAULT/ON UPDATE values combinations). Replaced 
  TABLE::time_stamp with TABLE::timestamp_default_now/on_update_now
  couple moved their setup to separate method set_timestamp_offsets(),
  which now is called from  open_table instead of Field_timestamp cons.
sql/field.h:
  Added more unireg types for handling of DEFAULT NOW() and ON UPDATE
  NOW() for TIMESTAMP fields.
  Fixed value corresponding to DEFAULT item for TIMESTAMP field.
sql/ha_berkeley.cc:
  Now TIMESTAMP column with auto-set property could be updated during
  INSERT or/and UPDATE independently.
sql/ha_heap.cc:
  Now TIMESTAMP column with auto-set property could be updated during
  INSERT or/and UPDATE independently.
sql/ha_innodb.cc:
  Now TIMESTAMP column with auto-set property could be updated during
  INSERT or/and UPDATE independently.
sql/ha_isam.cc:
  Now TIMESTAMP column with auto-set property could be updated during
  INSERT or/and UPDATE independently.
sql/ha_isammrg.cc:
  Now TIMESTAMP column with auto-set property could be updated during
  INSERT or/and UPDATE independently.
sql/ha_myisam.cc:
  Now TIMESTAMP column with auto-set property could be updated during
  INSERT or/and UPDATE independently.
sql/ha_myisammrg.cc:
  Now TIMESTAMP column with auto-set property could be updated during
  INSERT or/and UPDATE independently.
sql/item_func.h:
  We need to distinguish NOW() from other function for using in 
  DEFAULT and in ON UPDATE clauses.
sql/item_timefunc.h:
  We need to distinguish NOW() from other function for using in 
  DEFAULT and in ON UPDATE clauses.
sql/mysql_priv.h:
  Added parameter for ON UPDATE value to add_field_to_list() function.
sql/share/czech/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/danish/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/dutch/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/english/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/estonian/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/french/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/german/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/greek/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/hungarian/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/italian/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/japanese/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/korean/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/norwegian-ny/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/norwegian/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/polish/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/portuguese/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/romanian/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/russian/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/serbian/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/slovak/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/spanish/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/swedish/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/ukrainian/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/sql_base.cc:
  Added setup of TABLE::timestamp_default_now/on_update_now pair
  for each statement to open_table().
sql/sql_insert.cc:
  Using TABLE::timestamp_default_now/on_update_now pair instead of
  old TABLE::time_stamp. Added check for case then REPLACE could not
  be converted to UPDATE because of different DEFAULT/ON UPDATE values
  for TIMESTAMP field.
sql/sql_lex.h:
  Added member for value used in ON UPDATE clause to st_lex.
sql/sql_load.cc:
  Using TABLE::timestamp_default_now/on_update_now pair instead of
  old TABLE::time_stamp. We don't need to restore these members
  since they are set up for each statement in open_table().
sql/sql_parse.cc:
  Added handling of DEFAULT NOW() and ON UPDATE NOW() clauses for
  TIMESTAMP fields to add_field_to_list() function.
sql/sql_show.cc:
  Added support for DEFAULT CURRENT_TIMESTAMP (aka NOW() ) and 
  ON UPDATE CURRENT_TIMESTAMP to SHOW CREATE TABLE and SHOW COLUMNS.
sql/sql_table.cc:
  mysql_create_table() function - added check for number of TIMESTAMP 
    fields with auto-set values and replacing of old style TIMESTAMPs
    with their newer analogs.
  mysql_alter_table(): Using TABLE::timestamp_default_now/on_update_now 
    pair instead of old TABLE::time_stamp. We don't need to restore these
    members since they are set up for each statement in open_table().
sql/sql_update.cc:
  Left only setting of TABLE::timestamp_default_now/on_update_now
  to 0 since they should be already set up in open_table().
sql/sql_yacc.yy:
  Added support for DEFAULT NOW() and ON UPDATE NOW() in field
  definitions.
sql/table.h:
  Replaced TABLE::time_stamp withTABLE::timestamp_default_now/timestamp_on_update_now
  pair which allows to distinguish TIMESTAMP's with various DEFAULT/ON UPDATE
  clauses and optimize checks if TIMESTAMP field should be set to NOW()
  in handlers.
sql/unireg.cc:
  Now we are marking only TIMESTAMP fields with NOW() as default or
  as on update value as special field for unireg.
2004-04-02 10:12:53 +04:00

1479 lines
41 KiB
C++
Raw Blame History

/* Copyright (C) 2000 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));
#ifndef EMBEDDED_LIBRARY
if (thd->net.vio == 0)
{
sql_print_error(msgbuf);
return;
}
#endif
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 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_default_now)
update_timestamp(buf+table->timestamp_default_now-1);
/*
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))
{
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))
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_error("Note: 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_error("Note: 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_error("Note: 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);
}
}
/*
Deactive all not unique index that can be recreated fast
SYNOPSIS
deactivate_non_unique_index()
rows Rows to be inserted
0 if we don't know
HA_POS_ERROR if we want to disable all keys
*/
void ha_myisam::deactivate_non_unique_index(ha_rows rows)
{
MYISAM_SHARE* share = file->s;
bool do_warning=0;
if (share->state.key_map == ((ulonglong) 1L << share->base.keys)-1)
{
if (!(specialflag & SPECIAL_SAFE_MODE))
{
if (rows == HA_POS_ERROR)
{
uint orig_update= file->update;
file->update ^= HA_STATE_CHANGED;
uint check_update= file->update;
mi_extra(file, HA_EXTRA_NO_KEYS, 0);
do_warning= (file->update == check_update) && file->state->records;
file->update= orig_update;
}
else
{
/*
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 &&
(!rows || rows >= MI_MIN_ROWS_TO_USE_BULK_INSERT))
mi_disable_non_unique_index(file,rows);
else
{
mi_init_bulk_insert(file,
current_thd->variables.bulk_insert_buff_size,
rows);
table->bulk_insert= 1;
}
}
}
enable_activate_all_index=1;
info(HA_STATUS_CONST); // Read new key info
}
else
enable_activate_all_index=0;
if (do_warning)
push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_WARN,
ER_ILLEGAL_HA,
ER(ER_ILLEGAL_HA), table->table_name);
}
bool ha_myisam::activate_all_index(THD *thd)
{
int error=0;
MI_CHECK param;
MYISAM_SHARE* share = file->s;
DBUG_ENTER("activate_all_index");
mi_end_bulk_insert(file);
table->bulk_insert= 0;
if (enable_activate_all_index &&
share->state.key_map != set_bits(ulonglong, share->base.keys))
{
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
enable_activate_all_index=1;
DBUG_RETURN(error);
}
bool ha_myisam::check_and_repair(THD *thd)
{
int error=0;
int marked_crashed;
HA_CHECK_OPT check_opt;
DBUG_ENTER("ha_myisam::auto_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_error("Warning: Checking table: '%s'",table->path);
if ((marked_crashed=mi_is_crashed(file)) || check(thd, &check_opt))
{
sql_print_error("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;
}
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_on_update_now)
update_timestamp(new_data+table->timestamp_on_update_now-1);
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)
{
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)
{
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)
{
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)
{
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)
{
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)
{
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)))
{
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::reset(void)
{
return mi_extra(file, HA_EXTRA_RESET, 0);
}
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;
}
if (table->bulk_insert)
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
start_key Start of range. Null pointer if from first key
start_key_len Length of start key
start_search_flag Flag if start key should be included or not
end_key End of range. Null pointer if to last key
end_key_len Length of end key
end_search_flag Flag if start key should be included or not
NOTES
start_search_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
end_search_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(int inx,
const byte *start_key,uint start_key_len,
enum ha_rkey_function start_search_flag,
const byte *end_key,uint end_key_len,
enum ha_rkey_function end_search_flag)
{
return (ha_rows) mi_records_in_range(file,
inx,
start_key,start_key_len,
start_search_flag,
end_key,end_key_len,
end_search_flag);
}
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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