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aggregate functions check during substitution made only for single row subselects (BUG#4400)

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restoring current senect pointer before PS rexecution (backport from 5.0)
removed spaces at  lines ends


mysql-test/r/subselect.result:
  Aggregate function comparation with ALL/ANY/SOME subselect test
mysql-test/t/subselect.test:
  Aggregate function comparation with ALL/ANY/SOME subselect test
sql/item_subselect.cc:
  removed spaces at  lines ends
  aggregate functions check during substitution made only for single row subselects
sql/item_subselect.h:
  removed spaces at  lines ends
sql/sql_prepare.cc:
  restoring current senect pointer before PS rexecution (backport from 5.0)
This commit is contained in:
unknown
2004-07-04 08:46:28 +03:00
parent d760bfd6b0
commit cc74326b2a
5 changed files with 46 additions and 27 deletions
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8
mysql-test/r/subselect.result
View File

@ -1891,3 +1891,11 @@ abc b
3 4
deallocate prepare stmt1;
DROP TABLE t1, t2, t3;
CREATE TABLE `t1` ( `a` int(11) default NULL) ENGINE=MyISAM DEFAULT CHARSET=latin1;
insert into t1 values (1);
CREATE TABLE `t2` ( `b` int(11) default NULL, `a` int(11) default NULL) ENGINE=MyISAM DEFAULT CHARSET=latin1;
insert into t2 values (1,2);
select t000.a, count(*) `C` FROM t1 t000 GROUP BY t000.a HAVING count(*) > ALL (SELECT count(*) FROM t2 t001 WHERE t001.a=1);
a C
1 1
drop table t1,t2;

10
mysql-test/t/subselect.test
View File

@ -1212,3 +1212,13 @@ execute stmt1;
select * from t3;
deallocate prepare stmt1;
DROP TABLE t1, t2, t3;
#
# Aggregate function comparation with ALL/ANY/SOME subselect
#
CREATE TABLE `t1` ( `a` int(11) default NULL) ENGINE=MyISAM DEFAULT CHARSET=latin1;
insert into t1 values (1);
CREATE TABLE `t2` ( `b` int(11) default NULL, `a` int(11) default NULL) ENGINE=MyISAM DEFAULT CHARSET=latin1;
insert into t2 values (1,2);
select t000.a, count(*) `C` FROM t1 t000 GROUP BY t000.a HAVING count(*) > ALL (SELECT count(*) FROM t2 t001 WHERE t001.a=1);
drop table t1,t2;

44
sql/item_subselect.cc
View File

@ -14,7 +14,7 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/*
/*
subselect Item
SUBSELECT TODO:
@ -41,7 +41,7 @@ Item_subselect::Item_subselect():
{
reset();
/*
item value is NULL if select_subselect not changed this value
item value is NULL if select_subselect not changed this value
(i.e. some rows will be found returned)
*/
null_value= 1;
@ -114,7 +114,7 @@ Item_subselect::~Item_subselect()
}
Item_subselect::trans_res
Item_subselect::select_transformer(JOIN *join)
Item_subselect::select_transformer(JOIN *join)
{
DBUG_ENTER("Item_subselect::select_transformer");
DBUG_RETURN(RES_OK);
@ -148,11 +148,11 @@ bool Item_subselect::fix_fields(THD *thd_param, TABLE_LIST *tables, Item **ref)
if (have_to_be_excluded)
engine->exclude();
substitution= 0;
thd->where= "checking transformed subquery";
thd->where= "checking transformed subquery";
if (!(*ref)->fixed)
ret= (*ref)->fix_fields(thd, tables, ref);
// We can't substitute aggregate functions (like (SELECT (max(i)))
if ((*ref)->with_sum_func)
// We can't substitute aggregate functions like "SELECT (max(i))"
if (substype() == SINGLEROW_SUBS && (*ref)->with_sum_func)
{
my_error(ER_INVALID_GROUP_FUNC_USE, MYF(0));
return 1;
@ -161,7 +161,7 @@ bool Item_subselect::fix_fields(THD *thd_param, TABLE_LIST *tables, Item **ref)
}
// Is it one field subselect?
if (engine->cols() > max_columns)
{
{
my_error(ER_OPERAND_COLUMNS, MYF(0), 1);
return 1;
}
@ -199,7 +199,7 @@ bool Item_subselect::exec()
return (res);
}
Item::Type Item_subselect::type() const
Item::Type Item_subselect::type() const
{
return SUBSELECT_ITEM;
}
@ -277,7 +277,7 @@ Item_maxmin_subselect::Item_maxmin_subselect(Item_subselect *parent,
*/
used_tables_cache= parent->get_used_tables_cache();
const_item_cache= parent->get_const_item_cache();
DBUG_VOID_RETURN;
}
@ -299,7 +299,7 @@ Item_singlerow_subselect::select_transformer(JOIN *join)
{
if (changed)
return RES_OK;
SELECT_LEX *select_lex= join->select_lex;
Statement backup;
@ -314,10 +314,10 @@ Item_singlerow_subselect::select_transformer(JOIN *join)
TODO: solve above problem
*/
!(select_lex->item_list.head()->type() == FIELD_ITEM ||
select_lex->item_list.head()->type() == REF_ITEM)
select_lex->item_list.head()->type() == REF_ITEM)
)
{
have_to_be_excluded= 1;
if (join->thd->lex->describe)
{
@ -355,7 +355,7 @@ Item_singlerow_subselect::select_transformer(JOIN *join)
return RES_REDUCE;
}
return RES_OK;
err:
if (stmt)
thd->restore_backup_item_arena(stmt, &backup);
@ -418,7 +418,7 @@ void Item_singlerow_subselect::bring_value()
exec();
}
double Item_singlerow_subselect::val()
double Item_singlerow_subselect::val()
{
DBUG_ASSERT(fixed == 1);
if (!exec() && !value->null_value)
@ -433,7 +433,7 @@ double Item_singlerow_subselect::val()
}
}
longlong Item_singlerow_subselect::val_int()
longlong Item_singlerow_subselect::val_int()
{
DBUG_ASSERT(fixed == 1);
if (!exec() && !value->null_value)
@ -448,7 +448,7 @@ longlong Item_singlerow_subselect::val_int()
}
}
String *Item_singlerow_subselect::val_str (String *str)
String *Item_singlerow_subselect::val_str (String *str)
{
if (!exec() && !value->null_value)
{
@ -553,7 +553,7 @@ double Item_exists_subselect::val()
return (double) value;
}
longlong Item_exists_subselect::val_int()
longlong Item_exists_subselect::val_int()
{
DBUG_ASSERT(fixed == 1);
if (exec())
@ -590,7 +590,7 @@ double Item_in_subselect::val()
return (double) value;
}
longlong Item_in_subselect::val_int()
longlong Item_in_subselect::val_int()
{
DBUG_ASSERT(fixed == 1);
if (exec())
@ -842,7 +842,7 @@ Item_in_subselect::single_value_transformer(JOIN *join,
{
// it is single select without tables => possible optimization
item= func->create(left_expr, item);
// fix_field of item will be done in time of substituting
// fix_field of item will be done in time of substituting
substitution= item;
have_to_be_excluded= 1;
if (thd->lex->describe)
@ -885,7 +885,7 @@ Item_in_subselect::row_value_transformer(JOIN *join)
thd->where= "row IN/ALL/ANY subquery";
if (stmt)
thd->set_n_backup_item_arena(stmt, &backup);
thd->set_n_backup_item_arena(stmt, &backup);
SELECT_LEX *select_lex= join->select_lex;
@ -926,7 +926,7 @@ Item_in_subselect::row_value_transformer(JOIN *join)
List_iterator_fast<Item> li(select_lex->item_list);
for (uint i= 0; i < n; i++)
{
Item *func= new Item_ref_null_helper(this,
Item *func= new Item_ref_null_helper(this,
select_lex->ref_pointer_array+i,
(char *) "<no matter>",
(char *) "<list ref>");
@ -1108,7 +1108,7 @@ int subselect_single_select_engine::prepare()
(ORDER*) select_lex->order_list.first,
(ORDER*) select_lex->group_list.first,
select_lex->having,
(ORDER*) 0, select_lex,
(ORDER*) 0, select_lex,
select_lex->master_unit()))
return 1;
thd->lex->current_select= save_select;

10
sql/item_subselect.h
View File

@ -47,7 +47,7 @@ protected:
/* old engine if engine was changed */
subselect_engine *old_engine;
/* cache of used external tables */
table_map used_tables_cache;
table_map used_tables_cache;
/* allowed number of columns (1 for single value subqueries) */
uint max_columns;
/* work with 'substitution' */
@ -69,17 +69,17 @@ public:
virtual subs_type substype() { return UNKNOWN_SUBS; }
/*
/*
We need this method, because some compilers do not allow 'this'
pointer in constructor initialization list, but we need pass pointer
to subselect Item class to select_subselect classes constructor.
*/
virtual void init (st_select_lex *select_lex,
virtual void init (st_select_lex *select_lex,
select_subselect *result);
~Item_subselect();
void cleanup();
virtual void reset()
virtual void reset()
{
null_value= 1;
}
@ -275,7 +275,7 @@ public:
}
virtual ~subselect_engine() {}; // to satisfy compiler
virtual void cleanup()= 0;
// set_thd should be called before prepare()
void set_thd(THD *thd_arg) { thd= thd_arg; }
THD * get_thd() { return thd; }

1
sql/sql_prepare.cc
View File

@ -1706,6 +1706,7 @@ static void reset_stmt_for_execute(Prepared_statement *stmt)
unit->reinit_exec_mechanism();
}
}
stmt->lex->current_select= &stmt->lex->select_lex;
}