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by brian
clean slate |
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/* Copyright (C) 2000-2001, 2005 MySQL 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; 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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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rw_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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rw_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 */ |