494
494
Item **ref_pointer_array; ///<used pointer reference for this select
495
495
// Copy of above to be used with different lists
496
496
Item **items0, **items1, **items2, **items3, **current_ref_pointer_array;
498
498
const char *zero_result_cause; ///< not 0 if exec must return zero result
500
500
bool union_part; ///< this subselect is part of union