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merged

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bell@sanja.is.com.ua
2002-06-19 17:55:51 +03:00
parent f4f4962d4d f974c735cf
commit 0c808b431c
8 changed files with 235 additions and 79 deletions
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23
sql/sql_class.h
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@ -742,19 +742,36 @@ class select_union :public select_result {
bool flush();
};
/* Single value subselect interface class */
/* Base subselect interface class */
class select_subselect :public select_result
{
protected:
Item_subselect *item;
public:
select_subselect(Item_subselect *item);
bool send_fields(List<Item> &list, uint flag) { return 0; };
bool send_data(List<Item> &items);
bool send_data(List<Item> &items)=0;
bool send_eof() { return 0; };
friend class Ttem_subselect;
};
/* Single value subselect interface class */
class select_singleval_subselect :public select_subselect
{
public:
select_singleval_subselect(Item_subselect *item):select_subselect(item){}
bool send_data(List<Item> &items);
};
/* EXISTS subselect interface class */
class select_exists_subselect :public select_subselect
{
public:
select_exists_subselect(Item_subselect *item):select_subselect(item){}
bool send_data(List<Item> &items);
};
/* Structs used when sorting */
typedef struct st_sort_field {