pg_pltemplate

The pg_pltemplate system catalog table stores template information for procedural languages. A template for a language allows the language to be created in a particular database by a simple CREATE LANGUAGE command, with no need to specify implementation details. Unlike most system catalogs, pg_pltemplate is shared across all databases of Greenplum system: there is only one copy of pg_pltemplate per system, not one per database. This allows the information to be accessible in each database as it is needed.

There are not currently any commands that manipulate procedural language templates; to change the built-in information, a superuser must modify the table using ordinary INSERT, DELETE, or UPDATE commands.

Table 1. pg_catalog.pg_pltemplate

column	type	references	description
tmplname	name		Name of the language this template is for
tmpltrusted	boolean		True if language is considered trusted
tmpldbacreate	boolean		True if language may be created by a database owner
tmplhandler	text		Name of call handler function
tmplinline	text		Name of anonymous-block handler function, or null if none
tmplvalidator	text		Name of validator function, or NULL if none
tmpllibrary	text		Path of shared library that implements language
tmplacl	aclitem[]		Access privileges for template (not yet implemented).