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7c881e34ef
Fixed bug in ISAM and MyISAM when updating from multiple-processes Docs/manual.texi: Updated changelog client/mysqladmin.c: Upgraded version number because the change of llstr() is visible extra/perror.c: Added new error message include/my_base.h: Added HA_ERR_CRASHED_ON_USAGE isam/rnext.c: Fixed bug when updating from multiple-processes isam/rprev.c: Fixed bug when updating from multiple-processes libmysql/libmysql.c: Fixed that mysql->options.client_flag was used properly myisam/mi_locking.c: Fixed bug when updating from multiple-processes myisam/mi_open.c: Fixed bug when updating from multiple-processes Added HA_ERR_CRASHED_ON_USAGE myisam/mi_rnext.c: Fixed bug when updating from multiple-processes myisam/mi_rprev.c: Fixed bug when updating from multiple-processes myisam/myisamchk.c: Added HA_ERR_CRASHED_ON_USAGE sql/sql_base.cc: Fixed problem with auto-repair of MyISAM tables sql/table.cc: Fixed problem with auto-repair of MyISAM tables
65 lines
2.3 KiB
C
65 lines
2.3 KiB
C
/* 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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/* L{ser f|reg}ende post med samma isam-nyckel */
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#include "isamdef.h"
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/*
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L{ser f|reg}ende post med samma isamnyckel som f|reg}ende l{sning.
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Man kan ha gjort write, update eller delete p} f|reg}ende post.
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OBS! [ven om man {ndrade isamnyckeln p} f|reg}ende post l{ses
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posten i avseende p} f|reg}ende isam-nyckel-l{sning !!
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*/
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int nisam_rprev(N_INFO *info, byte *buf, int inx)
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{
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int error,changed;
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register uint flag;
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DBUG_ENTER("nisam_rprev");
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if ((inx = _nisam_check_index(info,inx)) < 0)
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DBUG_RETURN(-1);
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flag=SEARCH_SMALLER; /* Read previous */
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if (info->lastpos == NI_POS_ERROR && info->update & HA_STATE_NEXT_FOUND)
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flag=0; /* Read last */
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#ifndef NO_LOCKING
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if (_nisam_readinfo(info,F_RDLCK,1)) DBUG_RETURN(-1);
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#endif
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changed=_nisam_test_if_changed(info);
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if (!flag)
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error=_nisam_search_last(info,info->s->keyinfo+inx,info->s->state.key_root[inx]);
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else if (!changed)
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error=_nisam_search_next(info,info->s->keyinfo+inx,info->lastkey,flag,
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info->s->state.key_root[inx]);
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else
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error=_nisam_search(info,info->s->keyinfo+inx,info->lastkey,0,flag,
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info->s->state.key_root[inx]);
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info->update&= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED |
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HA_STATE_BUFF_SAVED);
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info->update|= HA_STATE_PREV_FOUND;
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if (error && my_errno == HA_ERR_KEY_NOT_FOUND)
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my_errno=HA_ERR_END_OF_FILE;
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if ((*info->read_record)(info,info->lastpos,buf) >=0)
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{
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info->update|= HA_STATE_AKTIV; /* Record is read */
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DBUG_RETURN(0);
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}
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DBUG_RETURN(-1);
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} /* nisam_rprev */
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