51.29. pg_language

The catalog pg_language registers languages in which you can write functions or stored procedures. See CREATE LANGUAGE and Chapter 41 for more information about language handlers.

Table 51.29. pg_language Columns

Name	Type	References	Description
`oid`	`oid`		Row identifier (hidden attribute; must be explicitly selected)
`lanname`	`name`		Name of the language
`lanowner`	`oid`	`pg_authid.oid`	Owner of the language
`lanispl`	`bool`		This is false for internal languages (such as SQL) and true for user-defined languages. Currently, pg_dump still uses this to determine which languages need to be dumped, but this might be replaced by a different mechanism in the future.
`lanpltrusted`	`bool`		True if this is a trusted language, which means that it is believed not to grant access to anything outside the normal SQL execution environment. Only superusers can create functions in untrusted languages.
`lanplcallfoid`	`oid`	`pg_proc.oid`	For noninternal languages this references the language handler, which is a special function that is responsible for executing all functions that are written in the particular language
`laninline`	`oid`	`pg_proc.oid`	This references a function that is responsible for executing “inline” anonymous code blocks (DO blocks). Zero if inline blocks are not supported.
`lanvalidator`	`oid`	`pg_proc.oid`	This references a language validator function that is responsible for checking the syntax and validity of new functions when they are created. Zero if no validator is provided.
`lanacl`	`aclitem[]`		Access privileges; see GRANT and REVOKE for details