On Thu, Oct 3, 2013 at 2:53 PM, Federico Di Gregorio <fog@dndg.it> wrote:
> Btw, I am a little curious, what kind of query requires an array of
> ~11000 values? Surely there is a better way to write it, isn't it?
I see it a lot when breaking up bulk operations into small chunks. If
you can't use a temporary table persisting across transactions (eg.
pgbouncer in transaction pooling mode), the fastest way is often a
script that first sucks down a huge list of ids and does the update in
lots of small transactions. It works because PG happily handles
queries like 'UPDATE foo SET bar='baz' WHERE id IN ([... 10,000 ids
...])' without breaking a sweat, even though on the surface it looks
like a really silly thing to do.
--
Stuart Bishop <stuart@stuartbishop.net>
http://www.stuartbishop.net/
