diff options
Diffstat (limited to 'storage/myisam/mi_scan.c')
-rw-r--r-- | storage/myisam/mi_scan.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/storage/myisam/mi_scan.c b/storage/myisam/mi_scan.c new file mode 100644 index 00000000..8d436c4e --- /dev/null +++ b/storage/myisam/mi_scan.c @@ -0,0 +1,46 @@ +/* Copyright (c) 2000, 2001, 2005-2007 MySQL AB + Use is subject to license terms + + 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */ + +/* Read through all rows sequntially */ + +#include "myisamdef.h" + +int mi_scan_init(register MI_INFO *info) +{ + DBUG_ENTER("mi_scan_init"); + info->nextpos=info->s->pack.header_length; /* Read first record */ + info->lastinx= -1; /* Can't forward or backward */ + if (info->opt_flag & WRITE_CACHE_USED && flush_io_cache(&info->rec_cache)) + DBUG_RETURN(my_errno); + DBUG_RETURN(0); +} + +/* + 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_END_OF_FILE = EOF. +*/ + +int mi_scan(MI_INFO *info, uchar *buf) +{ + DBUG_ENTER("mi_scan"); + /* Init all but update-flag */ + info->update&= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED); + DBUG_RETURN ((*info->s->read_rnd)(info,buf,info->nextpos,1)); +} |