/* Copyright (C) 2006 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 a record with random-access. The position to the record must get by MARIA_HA. The next record can be read with pos= MARIA_POS_ERROR */ #include "maria_def.h" /* Read a row based on position. If filepos= HA_OFFSET_ERROR then read next row Return values Returns one of following values: 0 = Ok. HA_ERR_RECORD_DELETED = Record is deleted. HA_ERR_END_OF_FILE = EOF. */ int maria_rrnd(MARIA_HA *info, byte *buf, register my_off_t filepos) { my_bool skip_deleted_blocks; DBUG_ENTER("maria_rrnd"); skip_deleted_blocks=0; if (filepos == HA_OFFSET_ERROR) { skip_deleted_blocks=1; if (info->lastpos == HA_OFFSET_ERROR) /* First read ? */ filepos= info->s->pack.header_length; /* Read first record */ else filepos= info->nextpos; } if (info->once_flags & RRND_PRESERVE_LASTINX) info->once_flags&= ~RRND_PRESERVE_LASTINX; else info->lastinx= -1; /* Can't forward or backward */ /* Init all but update-flag */ info->update&= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED); if (info->opt_flag & WRITE_CACHE_USED && flush_io_cache(&info->rec_cache)) DBUG_RETURN(my_errno); DBUG_RETURN ((*info->s->read_rnd)(info,buf,filepos,skip_deleted_blocks)); }