Email address parsing
From PostgreSQL wiki
This function extracts the real name from an email address. With slight variations, other components such as local part or host name can be extracted. Relying on a well-tested Perl module makes this function extremely robust, compared to say handcrafted pattern-matching approaches.
CREATE OR REPLACE FUNCTION email_name(email text) RETURNS text LANGUAGE plperlu AS $$ use Email::Address; my @addresses = Email::Address->parse($_); return undef unless scalar(@addresses) > 0; return $addresses->name; $$;