我有一个名为VW_PURCHASE_ORDER_LIST的视图.它总共有大约200,000条记录.
运行查询需要16ms:
select first 128 * from VW_PURCHASE_ORDER_LIST
但是,当我使用order by语句时,它需要更长的时间......大约9秒
select first 128 * from VW_PURCHASE_ORDER_LIST
order by id asc
Plan
PLAN SORT (JOIN (VW_PURCHASE_ORDER_LIST LEVY BT NATURAL, VW_PURCHASE_ORDER_LIST M INDEX (PK_MATTER), VW_PURCHASE_ORDER_LIST LEVY F INDEX (PK_B_BUDGET_LEVY_FREQUENCY), VW_PURCHASE_ORDER_LIST BT_FHC INDEX (PK_BT_FINANCIAL_HEALTH_CHECK), VW_PURCHASE_ORDER_LIST BD INDEX (PK_BT_BUILDING_DETAILS), VW_PURCHASE_ORDER_LIST USR_STRATAMANAGER INDEX (PK_USER_DETAIL), VW_PURCHASE_ORDER_LIST POH INDEX (FK_PURCHASE_ORDER_HEADER_1), VW_PURCHASE_ORDER_LIST PS INDEX (PK_LK_PO_PAID_STATUS), VW_PURCHASE_ORDER_LIST POS INDEX (PK_LK_PURCHASE_ORDER_STATUS), VW_PURCHASE_ORDER_LIST LM INDEX (UNQ1_P_ORDER_MODIFIED_DATE), VW_PURCHASE_ORDER_LIST SUPPLIER INDEX (PK_CONTACT), VW_PURCHASE_ORDER_LIST USR_CREATED INDEX (PK_USER_DETAIL), VW_PURCHASE_ORDER_LIST USR_MODIFIED INDEX (PK_USER_DETAIL), VW_PURCHASE_ORDER_LIST USR_APPROVED INDEX …