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BUG#18160 - Memory-/HEAP Table endless growing indexes

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Updating data in HEAP table with BTREE index results in wrong index_length
counter value, which keeps growing after each update.

When inserting new record into tree counter is incremented by:
sizeof(TREE_ELEMENT) + key_size + tree->size_of_element
But when deleting element from tree it doesn't decrement counter by key_size:
sizeof(TREE_ELEMENT) + tree->size_of_element

This fix makes accurate allocated memory counter for tree. That is
decrease counter by key_size when deleting tree element.
This commit is contained in:
svoj@april.(none) 2006-04-19 15:13:50 +05:00
parent da6210ee61
commit 06ce215f10
6 changed files with 26 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
heap/hp_delete.c
View File

@ -79,7 +79,8 @@ int hp_rb_delete_key(HP_INFO *info, register HP_KEYDEF *keyinfo,
custom_arg.key_length= hp_rb_make_key(keyinfo, info->recbuf, record, recpos);
custom_arg.search_flag= SEARCH_SAME;
old_allocated= keyinfo->rb_tree.allocated;
res= tree_delete(&keyinfo->rb_tree, info->recbuf, &custom_arg);
res= tree_delete(&keyinfo->rb_tree, info->recbuf, custom_arg.key_length,
&custom_arg);
info->s->index_length-= (old_allocated - keyinfo->rb_tree.allocated);
return res;
}

2
include/my_tree.h
View File

@ -84,7 +84,7 @@ TREE_ELEMENT *tree_insert(TREE *tree,void *key, uint key_size,
void *tree_search(TREE *tree, void *key, void *custom_arg);
int tree_walk(TREE *tree,tree_walk_action action,
void *argument, TREE_WALK visit);
int tree_delete(TREE *tree, void *key, void *custom_arg);
int tree_delete(TREE *tree, void *key, uint key_size, void *custom_arg);
void *tree_search_key(TREE *tree, const void *key,
TREE_ELEMENT **parents, TREE_ELEMENT ***last_pos,
enum ha_rkey_function flag, void *custom_arg);

2
myisam/myisamlog.c
View File

@ -475,7 +475,7 @@ static int examine_log(my_string file_name, char **table_names)
{
if (!curr_file_info->closed)
files_open--;
VOID(tree_delete(&tree, (gptr) curr_file_info, tree.custom_arg));
VOID(tree_delete(&tree, (gptr) curr_file_info, 0, tree.custom_arg));
}
break;
case MI_LOG_EXTRA:

10
mysql-test/r/heap_btree.result
View File

@ -246,3 +246,13 @@ DELETE from t1 where a < 100;
SELECT * from t1;
a
DROP TABLE t1;
CREATE TABLE t1(val INT, KEY USING BTREE(val)) ENGINE=memory;
INSERT INTO t1 VALUES(0);
SELECT INDEX_LENGTH FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA=DATABASE() AND TABLE_NAME='t1';
INDEX_LENGTH
21
UPDATE t1 SET val=1;
SELECT INDEX_LENGTH FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA=DATABASE() AND TABLE_NAME='t1';
INDEX_LENGTH
21
DROP TABLE t1;

10
mysql-test/t/heap_btree.test
View File

@ -164,4 +164,14 @@ DELETE from t1 where a < 100;
SELECT * from t1;
DROP TABLE t1;
#
# BUG#18160 - Memory-/HEAP Table endless growing indexes
#
CREATE TABLE t1(val INT, KEY USING BTREE(val)) ENGINE=memory;
INSERT INTO t1 VALUES(0);
SELECT INDEX_LENGTH FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA=DATABASE() AND TABLE_NAME='t1';
UPDATE t1 SET val=1;
SELECT INDEX_LENGTH FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA=DATABASE() AND TABLE_NAME='t1';
DROP TABLE t1;
# End of 4.1 tests

5
mysys/tree.c
View File

@ -271,7 +271,7 @@ TREE_ELEMENT *tree_insert(TREE *tree, void *key, uint key_size,
return element;
}
int tree_delete(TREE *tree, void *key, void *custom_arg)
int tree_delete(TREE *tree, void *key, uint key_size, void *custom_arg)
{
int cmp,remove_colour;
TREE_ELEMENT *element,***parent, ***org_parent, *nod;
@ -326,8 +326,7 @@ int tree_delete(TREE *tree, void *key, void *custom_arg)
rb_delete_fixup(tree,parent);
if (tree->free)
(*tree->free)(ELEMENT_KEY(tree,element), free_free, tree->custom_arg);
/* This doesn't include key_size, but better than nothing */
tree->allocated-= sizeof(TREE_ELEMENT)+tree->size_of_element;
tree->allocated-= sizeof(TREE_ELEMENT) + tree->size_of_element + key_size;
my_free((gptr) element,MYF(0));
tree->elements_in_tree--;
return 0;