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mi_rsamepos.c
Package: mysql-3.23.35.tar.gz [view]
Upload User: tsgydb
Upload Date: 2007-04-14
Package Size: 10674k
Code Size: 2k
Category:
MySQL
Development Platform:
Visual 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 */
- /* read record through position and fix key-position */
- /* As mi_rsame but supply a position */
- #include "myisamdef.h"
- /*
- ** If inx >= 0 update index pointer
- ** Returns one of the following values:
- ** 0 = Ok.
- ** HA_ERR_KEY_NOT_FOUND = Row is deleted
- ** HA_ERR_END_OF_FILE = End of file
- */
- int mi_rsame_with_pos(MI_INFO *info, byte *record, int inx, my_off_t filepos)
- {
- DBUG_ENTER("mi_rsame_with_pos");
- if (inx < -1 || ! (((ulonglong) 1 << inx) & info->s->state.key_map))
- {
- DBUG_RETURN(my_errno=HA_ERR_WRONG_INDEX);
- }
- info->update&= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED);
- if ((*info->s->read_rnd)(info,record,filepos,0))
- {
- if (my_errno == HA_ERR_RECORD_DELETED)
- my_errno=HA_ERR_KEY_NOT_FOUND;
- DBUG_RETURN(my_errno);
- }
- info->lastpos=filepos;
- info->lastinx=inx;
- if (inx >= 0)
- {
- info->lastkey_length=_mi_make_key(info,(uint) inx,info->lastkey,record,
- info->lastpos);
- info->update|=HA_STATE_KEY_CHANGED; /* Don't use indexposition */
- }
- DBUG_RETURN(0);
- } /* mi_rsame_pos */