pg_mcv_list_items ( pg_mcv_list ) → setof record

pg_mcv_list_items 返回一組記錄，描述儲存在多列列表中的所有項。MCV它返回以下列：

pg_mcv_list_items 函式可以這樣使用：

SELECT m.* FROM pg_statistic_ext join pg_statistic_ext_data on (oid = stxoid),
                pg_mcv_list_items(stxdmcv) m WHERE stxname = 'stts';

pg_mcv_list 型別的值只能從 pg_statistic_ext_data.stxdmcv 列獲取。