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Merge 192.168.0.100:mysql/mysql-5.0

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into  neptunus.(none):/home/msvensson/mysql/mysql-5.1
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msvensson@neptunus.(none)
2006-03-24 12:33:11 +01:00
parent 6a6d305540 de6b1b777c
commit ab1f95df3e
8 changed files with 91 additions and 20 deletions
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15
sql/opt_range.cc
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@@ -4799,9 +4799,18 @@ static SEL_TREE *get_mm_tree(RANGE_OPT_PARAM *param,COND *cond)
/* Here when simple cond */
if (cond->const_item())
{
if (cond->val_int())
DBUG_RETURN(new SEL_TREE(SEL_TREE::ALWAYS));
DBUG_RETURN(new SEL_TREE(SEL_TREE::IMPOSSIBLE));
/*
During the cond->val_int() evaluation we can come across a subselect
item which may allocate memory on the thd->mem_root and assumes
all the memory allocated has the same life span as the subselect
item itself. So we have to restore the thread's mem_root here.
*/
MEM_ROOT *tmp_root= param->mem_root;
param->thd->mem_root= param->old_root;
tree= cond->val_int() ? new(tmp_root) SEL_TREE(SEL_TREE::ALWAYS) :
new(tmp_root) SEL_TREE(SEL_TREE::IMPOSSIBLE);
param->thd->mem_root= tmp_root;
DBUG_RETURN(tree);
}
table_map ref_tables= 0;