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Fixed bug #18618.

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If the second or the third argument of a BETWEEN predicate was
a constant expression, like '2005.09.01' - INTERVAL 6 MONTH,
while the other two arguments were fields then the predicate 
was evaluated incorrectly and the query returned a wrong
result set.
The bug was introduced in 5.0.17 when in the fix for 12612.


mysql-test/r/func_time.result:
  Added a test case for bug #18618.
mysql-test/t/func_time.test:
  Added a test case for bug #18618.
This commit is contained in:
unknown
2006-04-11 10:03:37 -07:00
parent 6978949b49
commit 981bbaef87
3 changed files with 49 additions and 10 deletions
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12
sql/item_cmpfunc.cc
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@@ -52,7 +52,6 @@ static void agg_cmp_type(THD *thd, Item_result *type, Item **items, uint nitems)
{
uint i;
Field *field= NULL;
bool all_constant= TRUE;
/* If the first argument is a FIELD_ITEM, pull out the field. */
if (items[0]->real_item()->type() == Item::FIELD_ITEM)
@@ -65,16 +64,9 @@ static void agg_cmp_type(THD *thd, Item_result *type, Item **items, uint nitems)
for (i= 1; i < nitems; i++)
{
type[0]= item_cmp_type(type[0], items[i]->result_type());
if (field && !convert_constant_item(thd, field, &items[i]))
all_constant= FALSE;
if (field && convert_constant_item(thd, field, &items[i]))
type[0]= INT_RESULT;
}
/*
If we had a field that can be compared as a longlong, and all constant
items, then the aggregate result will be an INT_RESULT.
*/
if (field && all_constant)
type[0]= INT_RESULT;
}