mirror/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-01-16 20:12:31 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions
mariadb/storage/heap/hp_create.c
Sergei Golubchik a04e4f531a Merge branch '10.0' into 10.1
2018-02-22 14:12:02 +01:00

356 lines
11 KiB
C
Raw Blame History

/* Copyright (c) 2000, 2011, Oracle and/or its affiliates.
Copyright (c) 2010, 2017, MariaDB Corporation.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
#include "heapdef.h"
static int keys_compare(heap_rb_param *param, uchar *key1, uchar *key2);
static void init_block(HP_BLOCK *block,uint reclength,ulong min_records,
ulong max_records);
/* Create a heap table */
int heap_create(const char *name, HP_CREATE_INFO *create_info,
HP_SHARE **res, my_bool *created_new_share)
{
uint i, j, key_segs, max_length, length;
HP_SHARE *share= 0;
HA_KEYSEG *keyseg;
HP_KEYDEF *keydef= create_info->keydef;
uint reclength= create_info->reclength;
uint keys= create_info->keys;
ulong min_records= create_info->min_records;
ulong max_records= create_info->max_records;
uint visible_offset;
DBUG_ENTER("heap_create");
if (!create_info->internal_table)
{
mysql_mutex_lock(&THR_LOCK_heap);
share= hp_find_named_heap(name);
if (share && share->open_count == 0)
{
hp_free(share);
share= 0;
}
}
else
{
DBUG_PRINT("info", ("Creating internal (no named) temporary table"));
}
*created_new_share= (share == NULL);
if (!share)
{
HP_KEYDEF *keyinfo;
DBUG_PRINT("info",("Initializing new table"));
/*
We have to store sometimes uchar* del_link in records,
so the visible_offset must be least at sizeof(uchar*)
*/
visible_offset= MY_MAX(reclength, sizeof (char*));
for (i= key_segs= max_length= 0, keyinfo= keydef; i < keys; i++, keyinfo++)
{
bzero((char*) &keyinfo->block,sizeof(keyinfo->block));
bzero((char*) &keyinfo->rb_tree ,sizeof(keyinfo->rb_tree));
for (j= length= 0; j < keyinfo->keysegs; j++)
{
length+= keyinfo->seg[j].length;
if (keyinfo->seg[j].null_bit)
{
length++;
if (!(keyinfo->flag & HA_NULL_ARE_EQUAL))
keyinfo->flag|= HA_NULL_PART_KEY;
if (keyinfo->algorithm == HA_KEY_ALG_BTREE)
keyinfo->rb_tree.size_of_element++;
}
switch (keyinfo->seg[j].type) {
case HA_KEYTYPE_SHORT_INT:
case HA_KEYTYPE_LONG_INT:
case HA_KEYTYPE_FLOAT:
case HA_KEYTYPE_DOUBLE:
case HA_KEYTYPE_USHORT_INT:
case HA_KEYTYPE_ULONG_INT:
case HA_KEYTYPE_LONGLONG:
case HA_KEYTYPE_ULONGLONG:
case HA_KEYTYPE_INT24:
case HA_KEYTYPE_UINT24:
case HA_KEYTYPE_INT8:
keyinfo->seg[j].flag|= HA_SWAP_KEY;
break;
case HA_KEYTYPE_VARBINARY1:
/* Case-insensitiveness is handled in coll->hash_sort */
keyinfo->seg[j].type= HA_KEYTYPE_VARTEXT1;
/* fall through */
case HA_KEYTYPE_VARTEXT1:
keyinfo->flag|= HA_VAR_LENGTH_KEY;
length+= 2;
/* Save number of bytes used to store length */
keyinfo->seg[j].bit_start= 1;
break;
case HA_KEYTYPE_VARBINARY2:
/* Case-insensitiveness is handled in coll->hash_sort */
/* fall_through */
case HA_KEYTYPE_VARTEXT2:
keyinfo->flag|= HA_VAR_LENGTH_KEY;
length+= 2;
/* Save number of bytes used to store length */
keyinfo->seg[j].bit_start= 2;
/*
Make future comparison simpler by only having to check for
one type
*/
keyinfo->seg[j].type= HA_KEYTYPE_VARTEXT1;
break;
case HA_KEYTYPE_BIT:
/*
The odd bits which stored separately (if they are present
(bit_pos, bit_length)) are already present in seg[j].length as
additional byte.
See field.h, function key_length()
*/
break;
default:
break;
}
}
keyinfo->length= length;
length+= keyinfo->rb_tree.size_of_element +
((keyinfo->algorithm == HA_KEY_ALG_BTREE) ? sizeof(uchar*) : 0);
if (length > max_length)
max_length= length;
key_segs+= keyinfo->keysegs;
if (keyinfo->algorithm == HA_KEY_ALG_BTREE)
{
key_segs++; /* additional HA_KEYTYPE_END segment */
if (keyinfo->flag & HA_VAR_LENGTH_KEY)
keyinfo->get_key_length= hp_rb_var_key_length;
else if (keyinfo->flag & HA_NULL_PART_KEY)
keyinfo->get_key_length= hp_rb_null_key_length;
else
keyinfo->get_key_length= hp_rb_key_length;
}
}
if (!(share= (HP_SHARE*) my_malloc((uint) sizeof(HP_SHARE)+
keys*sizeof(HP_KEYDEF)+
key_segs*sizeof(HA_KEYSEG),
MYF(MY_ZEROFILL |
(create_info->internal_table ?
MY_THREAD_SPECIFIC : 0)))))
goto err;
share->keydef= (HP_KEYDEF*) (share + 1);
share->key_stat_version= 1;
keyseg= (HA_KEYSEG*) (share->keydef + keys);
init_block(&share->block, visible_offset + 1, min_records, max_records);
/* Fix keys */
memcpy(share->keydef, keydef, (size_t) (sizeof(keydef[0]) * keys));
for (i= 0, keyinfo= share->keydef; i < keys; i++, keyinfo++)
{
keyinfo->seg= keyseg;
memcpy(keyseg, keydef[i].seg,
(size_t) (sizeof(keyseg[0]) * keydef[i].keysegs));
keyseg+= keydef[i].keysegs;
if (keydef[i].algorithm == HA_KEY_ALG_BTREE)
{
/* additional HA_KEYTYPE_END keyseg */
keyseg->type= HA_KEYTYPE_END;
keyseg->length= sizeof(uchar*);
keyseg->flag= 0;
keyseg->null_bit= 0;
keyseg++;
init_tree(&keyinfo->rb_tree, 0, 0, sizeof(uchar*),
(qsort_cmp2)keys_compare, NULL, NULL,
MYF((create_info->internal_table ? MY_THREAD_SPECIFIC : 0) |
MY_TREE_WITH_DELETE));
keyinfo->delete_key= hp_rb_delete_key;
keyinfo->write_key= hp_rb_write_key;
}
else
{
init_block(&keyinfo->block, sizeof(HASH_INFO), min_records,
max_records);
keyinfo->delete_key= hp_delete_key;
keyinfo->write_key= hp_write_key;
keyinfo->hash_buckets= 0;
}
if ((keyinfo->flag & HA_AUTO_KEY) && create_info->with_auto_increment)
share->auto_key= i + 1;
}
share->min_records= min_records;
share->max_records= max_records;
share->max_table_size= create_info->max_table_size;
share->data_length= share->index_length= 0;
share->reclength= reclength;
share->visible= visible_offset;
share->blength= 1;
share->keys= keys;
share->max_key_length= max_length;
share->changed= 0;
share->auto_key= create_info->auto_key;
share->auto_key_type= create_info->auto_key_type;
share->auto_increment= create_info->auto_increment;
share->create_time= (long) time((time_t*) 0);
share->internal= create_info->internal_table;
/* Must be allocated separately for rename to work */
if (!(share->name= my_strdup(name,MYF(0))))
{
my_free(share);
goto err;
}
if (!create_info->internal_table)
{
thr_lock_init(&share->lock);
mysql_mutex_init(hp_key_mutex_HP_SHARE_intern_lock,
&share->intern_lock, MY_MUTEX_INIT_FAST);
share->open_list.data= (void*) share;
heap_share_list= list_add(heap_share_list,&share->open_list);
}
else
share->delete_on_close= 1;
}
if (!create_info->internal_table)
{
if (create_info->pin_share)
++share->open_count;
mysql_mutex_unlock(&THR_LOCK_heap);
}
*res= share;
DBUG_RETURN(0);
err:
if (!create_info->internal_table)
mysql_mutex_unlock(&THR_LOCK_heap);
DBUG_RETURN(1);
} /* heap_create */
static int keys_compare(heap_rb_param *param, uchar *key1, uchar *key2)
{
uint not_used[2];
return ha_key_cmp(param->keyseg, key1, key2, param->key_length,
param->search_flag, not_used);
}
static void init_block(HP_BLOCK *block, uint reclength, ulong min_records,
ulong max_records)
{
ulong i,recbuffer,records_in_block;
/*
If not min_records and max_records are given, optimize for 1000 rows
*/
if (!min_records)
min_records= MY_MIN(1000, max_records);
if (!max_records)
max_records= MY_MAX(min_records, 1000);
/*
We don't want too few records_in_block as otherwise the overhead of
of the HP_PTRS block will be too notable
*/
records_in_block= MY_MAX(1000, min_records);
records_in_block= MY_MIN(records_in_block, max_records);
/* If big max_records is given, allocate bigger blocks */
records_in_block= MY_MAX(records_in_block, max_records / 10);
/* We don't want too few blocks per row either */
if (records_in_block < 10)
records_in_block= 10;
recbuffer= (uint) (reclength + sizeof(uchar**) - 1) & ~(sizeof(uchar**) - 1);
/*
Don't allocate more than my_default_record_cache_size per level.
The + 1 is there to ensure that we get at least 1 row per level (for
the exceptional case of very long rows)
*/
if ((ulonglong) records_in_block*recbuffer >
(my_default_record_cache_size-sizeof(HP_PTRS)*HP_MAX_LEVELS))
records_in_block= (my_default_record_cache_size - sizeof(HP_PTRS) *
HP_MAX_LEVELS) / recbuffer + 1;
block->records_in_block= records_in_block;
block->recbuffer= recbuffer;
block->last_allocated= 0L;
for (i= 0; i <= HP_MAX_LEVELS; i++)
block->level_info[i].records_under_level=
(!i ? 1 : i == 1 ? records_in_block :
HP_PTRS_IN_NOD * block->level_info[i - 1].records_under_level);
}
static inline void heap_try_free(HP_SHARE *share)
{
DBUG_ENTER("heap_try_free");
if (share->open_count == 0)
hp_free(share);
else
{
DBUG_PRINT("info", ("Table is still in use. Will be freed on close"));
share->delete_on_close= 1;
}
DBUG_VOID_RETURN;
}
int heap_delete_table(const char *name)
{
int result;
reg1 HP_SHARE *share;
DBUG_ENTER("heap_delete_table");
mysql_mutex_lock(&THR_LOCK_heap);
if ((share= hp_find_named_heap(name)))
{
heap_try_free(share);
result= 0;
}
else
{
result= my_errno=ENOENT;
DBUG_PRINT("error", ("Could not find table '%s'", name));
}
mysql_mutex_unlock(&THR_LOCK_heap);
DBUG_RETURN(result);
}
void heap_drop_table(HP_INFO *info)
{
DBUG_ENTER("heap_drop_table");
mysql_mutex_lock(&THR_LOCK_heap);
heap_try_free(info->s);
mysql_mutex_unlock(&THR_LOCK_heap);
DBUG_VOID_RETURN;
}
void hp_free(HP_SHARE *share)
{
if (!share->internal)
{
heap_share_list= list_delete(heap_share_list, &share->open_list);
thr_lock_delete(&share->lock);
mysql_mutex_destroy(&share->intern_lock);
}
hp_clear(share); /* Remove blocks from memory */
my_free(share->name);
my_free(share);
return;
}
Reference in a new issue View git blame Copy permalink