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87 lines
2.3 KiB
C
87 lines
2.3 KiB
C
/* Copyright (c) 2000, 2004-2006 MySQL AB
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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 Street, Fifth Floor, Boston, MA 02110-1335 USA */
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/* Extra functions we want to do with a database */
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/* - Set flags for quicker databasehandler */
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/* - Set databasehandler to normal */
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/* - Reset recordpointers as after open database */
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#include "heapdef.h"
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static void heap_extra_keyflag(register HP_INFO *info,
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enum ha_extra_function function);
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/* set extra flags for database */
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int heap_extra(register HP_INFO *info, enum ha_extra_function function)
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{
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DBUG_ENTER("heap_extra");
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switch (function) {
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case HA_EXTRA_RESET_STATE:
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heap_reset(info);
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/* fall through */
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case HA_EXTRA_NO_READCHECK:
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info->opt_flag&= ~READ_CHECK_USED; /* No readcheck */
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break;
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case HA_EXTRA_READCHECK:
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info->opt_flag|= READ_CHECK_USED;
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break;
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case HA_EXTRA_CHANGE_KEY_TO_UNIQUE:
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case HA_EXTRA_CHANGE_KEY_TO_DUP:
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heap_extra_keyflag(info, function);
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break;
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default:
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break;
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}
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DBUG_RETURN(0);
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} /* heap_extra */
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int heap_reset(HP_INFO *info)
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{
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info->lastinx= -1;
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info->current_record= (ulong) ~0L;
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info->current_hash_ptr=0;
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info->update=0;
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info->next_block=0;
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return 0;
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}
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/*
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Start/Stop Inserting Duplicates Into a Table, WL#1648.
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*/
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static void heap_extra_keyflag(register HP_INFO *info,
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enum ha_extra_function function)
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{
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uint idx;
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for (idx= 0; idx< info->s->keys; idx++)
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{
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switch (function) {
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case HA_EXTRA_CHANGE_KEY_TO_UNIQUE:
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info->s->keydef[idx].flag|= HA_NOSAME;
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break;
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case HA_EXTRA_CHANGE_KEY_TO_DUP:
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info->s->keydef[idx].flag&= ~(HA_NOSAME);
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break;
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default:
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break;
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}
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}
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}
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