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Fixed bug #18237.

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The code in opt_sum_query that prevented the COUNT/MIN/MAX 
optimization from being applied to outer joins  was not adjusted 
after introducing nested joins. As a result if an outer join
contained a reference to a view as an inner table the code of
opt_sum_query missed the presence of an on expressions and
erroneously applied the mentioned optimization.


mysql-test/r/view.result:
  Added a test case for bug #18237.
mysql-test/t/view.test:
  Added a test case for bug #18237.
This commit is contained in:
unknown 2006-04-04 12:55:02 -07:00
commit e77888f530
3 changed files with 45 additions and 1 deletions
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8
sql/opt_sum.cc
View file

@ -96,8 +96,14 @@ int opt_sum_query(TABLE_LIST *tables, List<Item> &all_fields,COND *conds)
*/
for (TABLE_LIST *tl= tables; tl; tl= tl->next_leaf)
{
TABLE_LIST *embedded;
for (embedded= tl ; embedded; embedded= embedded->embedding)
{
if (embedded->on_expr)
break;
}
if (embedded)
/* Don't replace expression on a table that is part of an outer join */
if (tl->on_expr)
{
outer_tables|= tl->table->map;