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66 lines
2.1 KiB
C
66 lines
2.1 KiB
C
/* Copyright (c) 2000, 2001, 2005-2007 MySQL AB, 2009 Sun Microsystems, Inc.
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Use is subject to license terms.
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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; version 2 of the License.
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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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
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#include "myisamdef.h"
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/*
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** Find current row with read on position or read on key
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** If inx >= 0 find record using key
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** Return values:
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** 0 = Ok.
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** HA_ERR_KEY_NOT_FOUND = Row is deleted
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** HA_ERR_END_OF_FILE = End of file
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*/
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int mi_rsame(MI_INFO *info, uchar *record, int inx)
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{
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DBUG_ENTER("mi_rsame");
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if (inx != -1 && ! mi_is_key_active(info->s->state.key_map, inx))
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{
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DBUG_RETURN(my_errno=HA_ERR_WRONG_INDEX);
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}
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if (info->lastpos == HA_OFFSET_ERROR || info->update & HA_STATE_DELETED)
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{
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DBUG_RETURN(my_errno=HA_ERR_KEY_NOT_FOUND); /* No current record */
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}
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info->update&= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED);
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/* Read row from data file */
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if (fast_mi_readinfo(info))
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DBUG_RETURN(my_errno);
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if (inx >= 0)
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{
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info->lastinx=inx;
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info->lastkey_length=_mi_make_key(info,(uint) inx,info->lastkey,record,
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info->lastpos);
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if (info->s->concurrent_insert)
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mysql_rwlock_rdlock(&info->s->key_root_lock[inx]);
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(void) _mi_search(info,info->s->keyinfo+inx,info->lastkey, USE_WHOLE_KEY,
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SEARCH_SAME,
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info->s->state.key_root[inx]);
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if (info->s->concurrent_insert)
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mysql_rwlock_unlock(&info->s->key_root_lock[inx]);
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}
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if (!(*info->read_record)(info,info->lastpos,record))
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DBUG_RETURN(0);
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if (my_errno == HA_ERR_RECORD_DELETED)
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my_errno=HA_ERR_KEY_NOT_FOUND;
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DBUG_RETURN(my_errno);
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} /* mi_rsame */
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