From: | Dave Johansen <davejohansen(at)gmail(dot)com> |
---|---|
To: | Shaun Thomas <sthomas(at)optionshouse(dot)com> |
Cc: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, 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 16:23:07 |
Message-ID: | CAAcYxUec197ZbYoMms4DvUpX1yH425d=ypehppY9hzogpxwCfw@mail.gmail.com |
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Lists: | pgsql-performance |
On Fri, Dec 20, 2013 at 9:18 AM, Shaun Thomas <sthomas(at)optionshouse(dot)com>wrote:
> 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. :)
>
That is a good idea. I didn't even realize that there was such a command,
so I'll definitely use those.
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