"etsuko shimabukuro" <etsukos@meta-bit.com> writes:
> Does anyone know how to check the existance of user defined functions ?
> "\df" command lists all postgre built-in functions.
> How can we filter out only user defined ones ?
As of 7.3 you can restrict \df to particular schemas, eg
\df public.*
to see only functions defined in the "public" schema.
If you don't like that answer, issue your own query and add a check on
the ownership of the function --- try psql -E to see what its query
looks like.
regards, tom lane