Home » RDBMS Server » Performance Tuning » optimizer ignoring USE_HASH hint in MERGE Query (10.2.0.3)
optimizer ignoring USE_HASH hint in MERGE Query [message #525194] Fri, 30 September 2011 01:43 Go to next message
deepa_balu
Messages: 74
Registered: March 2005
Member
Will optimizer ignore use_hash hint? while choosing join ordER?

[Updated on: Fri, 30 September 2011 04:15]

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Re: optimizer ignoring USE_HASH hint in MERGE Query [message #525251 is a reply to message #525194] Fri, 30 September 2011 06:35 Go to previous messageGo to next message
ejdrba
Messages: 27
Registered: May 2005
Location: Kolkata
Junior Member
You meant using ORDERED hints with USE_HASH, answer is no, it works.

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Re: optimizer ignoring USE_HASH hint in MERGE Query [message #525254 is a reply to message #525194] Fri, 30 September 2011 06:42 Go to previous message
Michel Cadot
Messages: 68764
Registered: March 2007
Location: Saint-Maur, France, https...
Senior Member
Account Moderator
If you don't know how the optimizer works then don't use hints.

Regards
Michel

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