RE: how to optimize insert into t select * from t2

  • From: "Niall Litchfield" <n-litchfield@xxxxxxxxxxxxxxxxxxxxxxx>
  • To: <oracle-l@xxxxxxxxxxxxx>
  • Date: Fri, 12 Mar 2004 15:21:02 +0000

Hi April

It depends :( 

/*+ APPEND */ indicates a nologging operation, but then there is the FORCE 
LOGGING option..... 

It wouldn't be entirely surprising to find a production dba setting the latter 
(pace Wolfgang's comment about backup,backup,backup) where the test environment 
doesn't have it. 

Cheers

Niall

P.S. Juan where on earth did you get PCTFREE=3 seems an interesting value.  

> -----Original Message-----
> From: AWells@xxxxxxxxxx 
> Sent: 12 March 2004 14:52
> To: AWells@xxxxxxxxxx; oracle-l@xxxxxxxxxxxxx
> Subject: RE: how to optimize insert into t select * from t2
> 
> 
> 
> Juan... why don't you check on a test system to see if
> 
> insert into select from where
> 
> will for sure not create redo logs.



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