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82 lines
2.7 KiB
C
82 lines
2.7 KiB
C
/* Copyright (c) 2000, 2002-2007 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 "heapdef.h"
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int heap_rkey(HP_INFO *info, uchar *record, int inx, const uchar *key,
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key_part_map keypart_map, enum ha_rkey_function find_flag)
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{
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uchar *pos;
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HP_SHARE *share= info->s;
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HP_KEYDEF *keyinfo= share->keydef + inx;
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DBUG_ENTER("heap_rkey");
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DBUG_PRINT("enter",("info: %p inx: %d", info, inx));
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if ((uint) inx >= share->keys)
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{
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DBUG_RETURN(my_errno= HA_ERR_WRONG_INDEX);
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}
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info->lastinx= inx;
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info->current_record= (ulong) ~0L; /* For heap_rrnd() */
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info->key_version= info->s->key_version;
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if (keyinfo->algorithm == HA_KEY_ALG_BTREE)
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{
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heap_rb_param custom_arg;
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custom_arg.keyseg= info->s->keydef[inx].seg;
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custom_arg.key_length= info->lastkey_len=
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hp_rb_pack_key(keyinfo, (uchar*) info->lastkey,
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(uchar*) key, keypart_map);
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custom_arg.search_flag= SEARCH_FIND | SEARCH_SAME;
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/* for next rkey() after deletion */
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if (find_flag == HA_READ_AFTER_KEY)
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info->last_find_flag= HA_READ_KEY_OR_NEXT;
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else if (find_flag == HA_READ_BEFORE_KEY)
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info->last_find_flag= HA_READ_KEY_OR_PREV;
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else
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info->last_find_flag= find_flag;
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if (!(pos= tree_search_key(&keyinfo->rb_tree, info->lastkey, info->parents,
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&info->last_pos, find_flag, &custom_arg)))
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{
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info->update= HA_STATE_NO_KEY;
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DBUG_RETURN(my_errno= HA_ERR_KEY_NOT_FOUND);
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}
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memcpy(&pos, pos + (*keyinfo->get_key_length)(keyinfo, pos), sizeof(uchar*));
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info->current_ptr= pos;
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}
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else
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{
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if (!(pos= hp_search(info, share->keydef + inx, key, 0)))
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{
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info->update= HA_STATE_NO_KEY;
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DBUG_RETURN(my_errno);
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}
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if ((keyinfo->flag & (HA_NOSAME | HA_NULL_PART_KEY)) != HA_NOSAME)
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memcpy(info->lastkey, key, (size_t) keyinfo->length);
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}
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memcpy(record, pos, (size_t) share->reclength);
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info->update= HA_STATE_AKTIV;
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DBUG_RETURN(0);
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}
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/* Quick find of record */
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uchar* heap_find(HP_INFO *info, int inx, const uchar *key)
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{
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return hp_search(info, info->s->keydef + inx, key, 0);
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}
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