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47 lines
1.6 KiB
C
47 lines
1.6 KiB
C
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/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/* Read through all rows sequntially */
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#include "myisamdef.h"
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int mi_scan_init(register MI_INFO *info)
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{
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DBUG_ENTER("mi_scan_init");
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info->nextpos=info->s->pack.header_length; /* Read first record */
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info->lastinx= -1; /* Can't forward or backward */
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if (info->opt_flag & WRITE_CACHE_USED && flush_io_cache(&info->rec_cache))
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DBUG_RETURN(my_errno);
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DBUG_RETURN(0);
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}
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/*
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Read a row based on position.
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If filepos= HA_OFFSET_ERROR then read next row
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Return values
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Returns one of following values:
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0 = Ok.
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HA_ERR_END_OF_FILE = EOF.
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*/
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int mi_scan(MI_INFO *info, byte *buf)
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{
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DBUG_ENTER("mi_scan");
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/* Init all but update-flag */
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info->update&= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED);
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DBUG_RETURN ((*info->s->read_rnd)(info,buf,info->nextpos,1));
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}
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