Adding support for plpgsql - Mailing list pgsql-docs

    I'm trying to create a procedure that uses plpgsql, but the db tells
me that that language is not supported when creating the function. I copied
an example for creating the function using plpgsql. I see the CREATE
PROCEDURAL LANGUAGE command in the manual, but does plpgsql come standard?
Do I need to install an optional package to get the db to recognize plpgsql
functions?

Thanks for any assistance,
Mike