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Merge mysql.com:/home/psergey/mysql-5.0-bug8804-r12

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into  mysql.com:/home/psergey/mysql-5.1-bug8804-r12-merge


sql/item_cmpfunc.cc:
  Auto merged
sql/item_cmpfunc.h:
  Auto merged
sql/item_subselect.h:
  Auto merged
sql/mysql_priv.h:
  Auto merged
sql/mysqld.cc:
  Auto merged
sql/sql_lex.h:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/sql_select.h:
  Auto merged
mysql-test/r/ndb_subquery.result:
  Manual merge
mysql-test/r/subselect.result:
  Manual merge
mysql-test/r/subselect3.result:
  Manual merge
sql/item_subselect.cc:
  Manual merge
This commit is contained in:
unknown 2007-01-24 22:28:28 +03:00
commit 713bb7a09e
14 changed files with 1309 additions and 273 deletions
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34
sql/item_cmpfunc.cc
View file

@ -877,11 +877,35 @@ longlong Item_in_optimizer::val_int()
We disable the predicates we've pushed down into subselect, run the
subselect and see if it has produced any rows.
*/
((Item_in_subselect*)args[1])->enable_pushed_conds= FALSE;
longlong tmp= args[1]->val_bool_result();
result_for_null_param= null_value=
!((Item_in_subselect*)args[1])->engine->no_rows();
((Item_in_subselect*)args[1])->enable_pushed_conds= TRUE;
Item_in_subselect *item_subs=(Item_in_subselect*)args[1];
if (cache->cols() == 1)
{
item_subs->set_cond_guard_var(0, FALSE);
longlong tmp= args[1]->val_bool_result();
result_for_null_param= null_value= !item_subs->engine->no_rows();
item_subs->set_cond_guard_var(0, TRUE);
}
else
{
uint i;
uint ncols= cache->cols();
/*
Turn off the predicates that are based on column compares for
which the left part is currently NULL
*/
for (i= 0; i < ncols; i++)
{
if (cache->el(i)->null_value)
item_subs->set_cond_guard_var(i, FALSE);
}
longlong tmp= args[1]->val_bool_result();
result_for_null_param= null_value= !item_subs->engine->no_rows();
/* Turn all predicates back on */
for (i= 0; i < ncols; i++)
item_subs->set_cond_guard_var(i, TRUE);
}
}
}
return 0;