alter system set
"_optimizer_connect_by_cost_based"
=
false
scope=both ;
或者在session級別執行下列sql:
alter session set
"_optimizer_connect_by_cost_based"
=
false
scope=both ;
或者直接在語句級別加hint:
當然,從本case的實際情況看,在數據庫級別執行隱含參數的設置是最為合適的,避免在程序中做過多的改動。