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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


client/mysqltest.c:
  Auto merged
include/config-win.h:
  Auto merged
include/m_ctype.h:
  Auto merged
mysql-test/mysql-test-run.pl:
  Auto merged
mysql-test/r/subselect.result:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/opt_range.cc:
  Auto merged
strings/ctype-bin.c:
  Auto merged
strings/ctype-euc_kr.c:
  Auto merged
strings/ctype-gb2312.c:
  Auto merged
strings/ctype-ucs2.c:
  Auto merged
This commit is contained in:
unknown
2006-03-24 12:33:11 +01:00
parent 045d42e53f f97d76ac1c
commit e65c4d2297
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;