mirror of
https://github.com/MariaDB/server.git
synced 2025-01-17 04:22:27 +01:00
3678231d5a
Conflicts: Text conflict in mysql-test/r/partition.result Text conflict in mysql-test/t/partition.test Text conflict in storage/myisam/mi_dynrec.c
80 lines
2.7 KiB
C
80 lines
2.7 KiB
C
/* Copyright (C) 2000-2003, 2005 MySQL AB, 2008-2009 Sun Microsystems, Inc
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; version 2 of the License.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
|
|
|
|
/* Remove all rows from a MyISAM table */
|
|
/* This clears the status information and truncates files */
|
|
|
|
#include "myisamdef.h"
|
|
|
|
int mi_delete_all_rows(MI_INFO *info)
|
|
{
|
|
uint i;
|
|
MYISAM_SHARE *share=info->s;
|
|
MI_STATE_INFO *state=&share->state;
|
|
DBUG_ENTER("mi_delete_all_rows");
|
|
|
|
if (share->options & HA_OPTION_READ_ONLY_DATA)
|
|
{
|
|
DBUG_RETURN(my_errno=EACCES);
|
|
}
|
|
if (_mi_readinfo(info,F_WRLCK,1))
|
|
DBUG_RETURN(my_errno);
|
|
if (_mi_mark_file_changed(info))
|
|
goto err;
|
|
|
|
info->state->records=info->state->del=state->split=0;
|
|
state->dellink = HA_OFFSET_ERROR;
|
|
state->sortkey= (ushort) ~0;
|
|
info->state->key_file_length=share->base.keystart;
|
|
info->state->data_file_length=0;
|
|
info->state->empty=info->state->key_empty=0;
|
|
info->state->checksum=0;
|
|
|
|
for (i=share->base.max_key_block_length/MI_MIN_KEY_BLOCK_LENGTH ; i-- ; )
|
|
state->key_del[i]= HA_OFFSET_ERROR;
|
|
for (i=0 ; i < share->base.keys ; i++)
|
|
state->key_root[i]= HA_OFFSET_ERROR;
|
|
|
|
myisam_log_command(MI_LOG_DELETE_ALL,info,(uchar*) 0,0,0);
|
|
/*
|
|
If we are using delayed keys or if the user has done changes to the tables
|
|
since it was locked then there may be key blocks in the key cache
|
|
*/
|
|
flush_key_blocks(share->key_cache, share->kfile, FLUSH_IGNORE_CHANGED);
|
|
#ifdef HAVE_MMAP
|
|
if (share->file_map)
|
|
mi_munmap_file(info);
|
|
#endif
|
|
if (mysql_file_chsize(info->dfile, 0, 0, MYF(MY_WME)) ||
|
|
mysql_file_chsize(share->kfile, share->base.keystart, 0, MYF(MY_WME)))
|
|
goto err;
|
|
(void) _mi_writeinfo(info,WRITEINFO_UPDATE_KEYFILE);
|
|
#ifdef HAVE_MMAP
|
|
/* Map again */
|
|
if (share->file_map)
|
|
mi_dynmap_file(info, (my_off_t) 0);
|
|
#endif
|
|
allow_break(); /* Allow SIGHUP & SIGINT */
|
|
DBUG_RETURN(0);
|
|
|
|
err:
|
|
{
|
|
int save_errno=my_errno;
|
|
(void) _mi_writeinfo(info,WRITEINFO_UPDATE_KEYFILE);
|
|
info->update|=HA_STATE_WRITTEN; /* Buffer changed */
|
|
allow_break(); /* Allow SIGHUP & SIGINT */
|
|
DBUG_RETURN(my_errno=save_errno);
|
|
}
|
|
} /* mi_delete */
|