explain plan for select * from ( select col_int, col_bgint, col_char, col_vchar, col_tmstmp, col_date, col_boln, col_dbl from `prqUnAll_0_v` union all select col_int, col_bgint, col_char, col_vchar, col_tmstmp, col_date, col_boln, col_dbl from `prqUnAll_1_v`) t limit 0; |