Re: Recommendations for partitioning?

From: Shaun Thomas <sthomas(at)optionshouse(dot)com>
To: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Dave Johansen <davejohansen(at)gmail(dot)com>
Cc: Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>, Jeff Janes <jeff(dot)janes(at)gmail(dot)com>, pgsql-performance <pgsql-performance(at)postgresql(dot)org>
Subject: Re: Recommendations for partitioning?
Date: 2013-12-20 16:18:21
Message-ID: 52B46DCD.2070107@optionshouse.com
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On 12/20/2013 09:59 AM, Alvaro Herrera wrote:

> WITH moved AS (
> DELETE FROM src WHERE ..
> RETURNING *
> ) INSERT INTO dst SELECT * FROM moved;

I know that's effectively an atomic action, but I'd feel a lot more
comfortable reversing that logic so the delete is based on the results
of the insert.

WITH saved AS (
INSERT INTO dst
SELECT * FROM src WHERE ...
RETURNING *
)
DELETE FROM src
WHERE ...;

I'll admit yours is cleaner, though. :)

--
Shaun Thomas
OptionsHouse | 141 W. Jackson Blvd. | Suite 500 | Chicago IL, 60604
312-676-8870
sthomas(at)optionshouse(dot)com

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