| From: | Merlin Moncure <mmoncure(at)gmail(dot)com> |
|---|---|
| To: | Rui Carvalho <rui(dot)hmcarvalho(at)gmail(dot)com> |
| Cc: | ramasubramanian <ramasubramanian(dot)g(at)renaissance-it(dot)com>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Array comparison |
| Date: | 2010-01-08 16:36:04 |
| Message-ID: | b42b73151001080836h1bc7faddk9bf62816c252d507@mail.gmail.com |
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| Lists: | pgsql-performance |
On Fri, Jan 8, 2010 at 11:06 AM, Rui Carvalho <rui(dot)hmcarvalho(at)gmail(dot)com> wrote:
> Hi
>
> well it's pretty simple
>
> if you want to see if there are elements in common then instead of "any" use
> "&&"
> if you want to see if they are equal just use " = " that will five you true
> or false
you also have the option of expanding the array into a set and using
standard query techniques. w/8.4, you can use the built in
unnest()...for earlier versions you have to create it yourself
(trivially done):
http://archives.postgresql.org/pgsql-patches/2008-03/msg00308.php
merlin
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