exec dbms_stats.gather_table_stats('PRO','tbl_request',cascade => true);
alter system flush shared_pool;
数据库缓存
exec dbms_stats.gather_table_stats('PRO','tbl_request',cascade => true);
alter system flush shared_pool;
exec dbms_stats.gather_table_stats('PRO','tbl_request',cascade => true);
alter system flush shared_pool;