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EXISTS type of subselect

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more correct parameters in result creation script


mysql-test/create-test-result:
  more correct parameters in result creation script
mysql-test/r/subselect.result:
  test of EXISTS
mysql-test/t/subselect.test:
  test of EXISTS
sql/item_subselect.cc:
  EXISTS type of subselect
sql/item_subselect.h:
  EXISTS type of subselect
sql/sql_class.cc:
  EXISTS type of subselect
sql/sql_class.h:
  EXISTS type of subselect
sql/sql_yacc.yy:
  EXISTS type of subselect
This commit is contained in:
unknown
2002-06-19 17:52:44 +03:00
parent 454712d20e
commit c6a2ae17a0
8 changed files with 235 additions and 79 deletions
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43
sql/sql_class.cc
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@@ -763,7 +763,6 @@ void select_dump::send_error(uint errcode,const char *err)
file= -1;
}
bool select_dump::send_eof()
{
int error=test(end_io_cache(&cache));
@@ -782,10 +781,11 @@ select_subselect::select_subselect(Item_subselect *item)
this->item=item;
}
bool select_subselect::send_data(List<Item> &items)
bool select_singleval_subselect::send_data(List<Item> &items)
{
DBUG_ENTER("select_subselect::send_data");
if (item->assigned){
DBUG_ENTER("select_singleval_subselect::send_data");
Item_singleval_subselect *it= (Item_singleval_subselect *)item;
if (it->assigned){
my_printf_error(ER_SUBSELECT_NO_1_ROW, ER(ER_SUBSELECT_NO_1_ROW), MYF(0));
DBUG_RETURN(1);
}
@@ -800,18 +800,33 @@ bool select_subselect::send_data(List<Item> &items)
Following val() call have to be first, because function AVG() & STD()
calculate value on it & determinate "is it NULL?".
*/
item->real_value= val_item->val();
if ((item->null_value= val_item->is_null()))
it->real_value= val_item->val();
if ((it->null_value= val_item->is_null()))
{
item->assign_null();
it->assign_null();
} else {
item->max_length= val_item->max_length;
item->decimals= val_item->decimals;
item->binary= val_item->binary;
val_item->val_str(&item->str_value);
item->int_value= val_item->val_int();
item->res_type= val_item->result_type();
it->max_length= val_item->max_length;
it->decimals= val_item->decimals;
it->binary= val_item->binary;
val_item->val_str(&it->str_value);
it->int_value= val_item->val_int();
it->res_type= val_item->result_type();
}
item->assigned= 1;
it->assigned= 1;
DBUG_RETURN(0);
}
bool select_exists_subselect::send_data(List<Item> &items)
{
DBUG_ENTER("select_exists_subselect::send_data");
Item_exists_subselect *it= (Item_exists_subselect *)item;
if (unit->offset_limit_cnt)
{ // Using limit offset,count
unit->offset_limit_cnt--;
DBUG_RETURN(0);
}
it->value= 1;
it->assigned= 1;
DBUG_RETURN(0);
}