RE: _gby_hash_aggregation_enabled=false

According to the explain plan, the queries went back to 'SORT (GROUP BY)' immediately. But I didn't run an extended trace to verify the execution was actually doing that.  

select count(distinct plan_hash_value) from v$sql_plan where operation =
'HASH' and options = 'GROUP BY';

0 Rows    

Chris Taylor

Sr. Oracle DBA

Ingram Barge Company

Nashville, TN 37205

Office: 615-517-3355

Cell: 615-354-4799

Email: chris.taylor_at_ingrambarge.com

From: Allen, Brandon [mailto:Brandon.Allen_at_OneNeck.com] Sent: Friday, November 30, 2007 9:49 AM
To: Taylor, Chris David; oracle-l_at_freelists.org Subject: RE: _gby_hash_aggregation_enabled=false  

When you set it, did it stop the query from using HASH GROUP BY?  

If you don't mind, could you please check and see what you get from the following query:  

select count(distinct plan_hash_value) from v$sql_plan where operation =
'HASH' and options = 'GROUP BY';
 

Thanks,

Brandon  

From: Taylor, Chris David [mailto:Chris.Taylor_at_ingrambarge.com]

Well I was going to say we had set it and have not experienced any problems.  

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