On Mar 24, 2008, at 1:09 PM, Martijn van Oosterhout wrote:
> On Mon, Mar 24, 2008 at 12:47:43PM -0500, Josh Trutwin wrote:
>> My code to check if an aggregate exists runs this query:
>>
>> SELECT * FROM pg_catalog.pg_aggretate WHERE aggfnoid =
>> 'foo'::REGPROC;
>
> Seems to me you'd rather want the proisagg column in pg_proc and
> forget
> about pg_aggregate altogether...
Also, the idiom for checking if something is present is normally:
SELECT 1 FROM some_table WHERE ...;
This way you aren't dealing with errors, if it doesn't exist the query
simply doesn't return any results.
Erik Jones
DBA | Emma®
erik@myemma.com
800.595.4401 or 615.292.5888
615.292.0777 (fax)
Emma helps organizations everywhere communicate & market in style.
Visit us online at http://www.myemma.com
