mirror of
https://github.com/MariaDB/server.git
synced 2025-11-03 14:33:32 +03:00
3fb088a075
Add support for VARCHAR with 1 or 2 length bytes Enable VARCHAR packing in MyISAM files (previous patch didn't pack data properly) Give error if we got problems in temporary tables during a SELECT Don't use new table generated by ALTER TABLE if index generation fails Fixed wrong call by range_end() (Could cause an ASSERT in debug mode)
93 lines
2.6 KiB
C
93 lines
2.6 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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/* open a heap-database */
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#include "heapdef.h"
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#ifdef VMS
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#include "hp_static.c" /* Stupid vms-linker */
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#endif
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#include "my_sys.h"
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HP_INFO *heap_open(const char *name, int mode)
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{
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HP_INFO *info;
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HP_SHARE *share;
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DBUG_ENTER("heap_open");
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pthread_mutex_lock(&THR_LOCK_heap);
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if (!(share= hp_find_named_heap(name)))
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{
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my_errno= ENOENT;
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pthread_mutex_unlock(&THR_LOCK_heap);
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DBUG_RETURN(0);
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}
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if (!(info= (HP_INFO*) my_malloc((uint) sizeof(HP_INFO) +
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2 * share->max_key_length,
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MYF(MY_ZEROFILL))))
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{
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pthread_mutex_unlock(&THR_LOCK_heap);
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DBUG_RETURN(0);
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}
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share->open_count++;
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#ifdef THREAD
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thr_lock_data_init(&share->lock,&info->lock,NULL);
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#endif
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info->open_list.data= (void*) info;
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heap_open_list= list_add(heap_open_list,&info->open_list);
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pthread_mutex_unlock(&THR_LOCK_heap);
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info->s= share;
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info->lastkey= (byte*) (info + 1);
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info->recbuf= (byte*) (info->lastkey + share->max_key_length);
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info->mode= mode;
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info->current_record= (ulong) ~0L; /* No current record */
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info->current_ptr= 0;
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info->current_hash_ptr= 0;
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info->lastinx= info->errkey= -1;
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info->update= 0;
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#ifndef DBUG_OFF
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info->opt_flag= READ_CHECK_USED; /* Check when changing */
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#endif
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DBUG_PRINT("exit",("heap: 0x%lx reclength: %d records_in_block: %d",
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info,share->reclength,share->block.records_in_block));
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DBUG_RETURN(info);
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}
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/* map name to a heap-nr. If name isn't found return 0 */
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HP_SHARE *hp_find_named_heap(const char *name)
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{
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LIST *pos;
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HP_SHARE *info;
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DBUG_ENTER("heap_find");
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DBUG_PRINT("enter",("name: %s",name));
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for (pos= heap_share_list; pos; pos= pos->next)
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{
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info= (HP_SHARE*) pos->data;
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if (!strcmp(name, info->name))
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{
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DBUG_PRINT("exit", ("Old heap_database: 0x%lx",info));
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DBUG_RETURN(info);
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}
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}
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DBUG_RETURN((HP_SHARE *) 0);
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}
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