Re: Duplicate deletion optimizations

It was not query... Just sentence where some index values in one table
not exist in another...

So query could be with:
• WHERE (col1,col2,col2) NOT IN
• WHERE NOT EXISTS
• LEFT JOIN live USING (col1,col2,col2) WHERE live.id IS NULL

what ever whoever prefer more or what gives better results... But I
think it is more personal feelings which is better then real...

Sent from my Windows Phone
From: Jochen Erwied
Sent: 07/01/2012 15:18
To: Misa Simic
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: [PERFORM] Duplicate deletion optimizations
Saturday, January 7, 2012, 3:02:10 PM you wrote:

> • insert into live from temp where col1, col2 and col3 not exists in
> live

'not exists' is something I'm trying to avoid, even if the optimizer is
able to handle it.

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