Strange query behavior oracle 11g

Question

I have a query as:

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.

This query works. But if I just remove the name from the select part like:

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.

The query just hangs but was working on oracle 10 g and the problem started when we upgraded to oracle 11g. Could anyone explain why?

Answer 1

Got the issue solved by using : alter session set optimizer_features_enable='10.2.0.4' –