mariadb/myisammrg/myrg_queue.c
unknown 8d6634c9e0 Added more tests for new UPDATE ... ORDER BY ... LIMIT optimization
heap/_check.c:
  Change arguments to ha_key_cmp
heap/hp_create.c:
  Change arguments to ha_key_cmp
include/my_base.h:
  Remove SEARCH_RETURN_B_POS and instead always send an array to ha_key_cmp() as last argument
myisam/mi_check.c:
  Change arguments to ha_key_cmp
myisam/mi_rnext_same.c:
  Change arguments to ha_key_cmp
myisam/mi_search.c:
  Change arguments to ha_key_cmp
myisam/mi_write.c:
  Change arguments to ha_key_cmp
myisammrg/myrg_queue.c:
  Change arguments to ha_key_cmp
mysys/my_handler.c:
  Remove SEARCH_RETURN_B_POS and instead always send an array to ha_key_cmp() as last argument
  (This removes an if in a loop at the expensive of an int on the stack)
sql/records.cc:
  Simplify new rr_index() code
  Create common error handling function for rr_() functions.
  Remove loop from rr_index() as handler::index_next() can never return HA_ERR_RECORD_DELETED
sql/sql_load.cc:
  Simplify
sql/sql_update.cc:
  Simplify code
  Fixed bug when one is updating an index column that could be used with ORDER BY
sql/structs.h:
  Removed not needed structure element
2005-10-25 02:27:40 +03:00

65 lines
2 KiB
C

/* 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 */
#include "myrg_def.h"
static int queue_key_cmp(void *keyseg, byte *a, byte *b)
{
MI_INFO *aa=((MYRG_TABLE *)a)->table;
MI_INFO *bb=((MYRG_TABLE *)b)->table;
uint not_used[2];
int ret= ha_key_cmp((HA_KEYSEG *)keyseg, aa->lastkey, bb->lastkey,
USE_WHOLE_KEY, SEARCH_FIND, not_used);
return ret < 0 ? -1 : ret > 0 ? 1 : 0;
} /* queue_key_cmp */
int _myrg_init_queue(MYRG_INFO *info,int inx,enum ha_rkey_function search_flag)
{
int error=0;
QUEUE *q= &(info->by_key);
if (inx < (int) info->keys)
{
if (!is_queue_inited(q))
{
if (init_queue(q,info->tables, 0,
(myisam_readnext_vec[search_flag] == SEARCH_SMALLER),
queue_key_cmp,
info->open_tables->table->s->keyinfo[inx].seg))
error=my_errno;
}
else
{
if (reinit_queue(q,info->tables, 0,
(myisam_readnext_vec[search_flag] == SEARCH_SMALLER),
queue_key_cmp,
info->open_tables->table->s->keyinfo[inx].seg))
error=my_errno;
}
}
return error;
}
int _myrg_mi_read_record(MI_INFO *info, byte *buf)
{
if (!(*info->read_record)(info,info->lastpos,buf))
{
info->update|= HA_STATE_AKTIV; /* Record is read */
return 0;
}
return my_errno;
}