Access to the database itself from your Perl function can be done via
an experimental module DBD::PgSPI
(also available at CPAN
mirror sites). This module makes available a
DBI-compliant database-handle named
$pg_dbh that can be used to perform queries
with normal DBI syntax.
PL/Perl itself presently provides only one additional Perl command:
- elog level, msg
Emit a log or error message. Possible levels are
DEBUG, LOG, INFO,
NOTICE, WARNING, and ERROR.
ERROR raises an error condition: further execution
of the function is abandoned, and the current transaction is
aborted.
