info.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:3k
- /* 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 */
- /* Ger tillbaka en struct med information om isam-filen */
- #include "isamdef.h"
- #ifdef __WIN__
- #include <sys/stat.h>
- #endif
- ulong nisam_position(N_INFO *info)
- {
- return info->lastpos;
- }
- /* If flag == 1 one only gets pos of last record */
- /* if flag == 2 one get current info (no sync from database */
- int nisam_info(N_INFO *info, register N_ISAMINFO *x, int flag)
- {
- struct stat state;
- ISAM_SHARE *share=info->s;
- DBUG_ENTER("nisam_info");
- x->recpos = info->lastpos;
- if (flag & (HA_STATUS_TIME | HA_STATUS_CONST | HA_STATUS_VARIABLE |
- HA_STATUS_ERRKEY | HA_STATUS_NO_LOCK))
- {
- #ifndef NO_LOCKING
- if (!(flag & HA_STATUS_NO_LOCK))
- {
- pthread_mutex_lock(&share->intern_lock);
- VOID(_nisam_readinfo(info,F_RDLCK,0));
- VOID(_nisam_writeinfo(info,0));
- pthread_mutex_unlock(&share->intern_lock);
- }
- #endif
- x->records = share->state.records;
- x->deleted = share->state.del;
- x->delete_length= share->state.empty;
- x->keys = share->state.keys;
- x->reclength = share->base.reclength;
- x->mean_reclength= share->state.records ?
- (share->state.data_file_length-share->state.empty)/share->state.records :
- share->min_pack_length;
- x->data_file_length=share->state.data_file_length;
- x->max_data_file_length=share->base.max_data_file_length;
- x->index_file_length=share->state.key_file_length;
- x->max_index_file_length=share->base.max_key_file_length;
- x->filenr = info->dfile;
- x->errkey = info->errkey;
- x->dupp_key_pos= info->dupp_key_pos;
- x->options = share->base.options;
- x->create_time=share->base.create_time;
- x->isamchk_time=share->base.isamchk_time;
- x->rec_per_key=share->base.rec_per_key;
- if ((flag & HA_STATUS_TIME) && !fstat(info->dfile,&state))
- x->update_time=state.st_mtime;
- else
- x->update_time=0;
- x->sortkey= -1; /* No clustering */
- }
- DBUG_RETURN(0);
- } /* nisam_info */