oracle 11g奇怪的查詢行為

Question

我有一個查詢：

SELECT ps_node_id,name 
FROM cz_ps_nodes WHERE cz_ps_nodes.ps_node_type=261
START WITH NAME = 'Bundle Rule Repository',cz_ps_nodes.devl_project_id = P_devl_project_id AND cz_ps_nodes.deleted_flag = 0
CONNECT BY PRIOR ps_node_id = parent_id.

該查詢有效。 但是，如果我只是從選擇部分中刪除名稱，例如：

SELECT ps_node_id
FROM cz_ps_nodes WHERE cz_ps_nodes.ps_node_type = 261                       
START WITH NAME = 'Bundle Rule Repository',cz_ps_nodes.devl_project_id = P_devl_project_id AND cz_ps_nodes.deleted_flag = 0                                         
CONNECT BY PRIOR ps_node_id = parent_id.

該查詢只是掛起，但在oracle 10 g上運行，並且當我們升級到oracle 11g時問題開始了。 誰能解釋為什么？

Answer 1

通過使用以下方法解決了該問題：alter session set Optimizer_features_enable = '10 .2.0.4'–