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The pg_language system catalog table registers languages in which you can write functions or stored procedures. It is populated by CREATE LANGUAGE.
| column | type | references | description |
|---|---|---|---|
lanname | name | Name of the language. | |
lanowner | oid | pg_authid.oid | Owner of the language. |
lanispl | boolean | 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 may be replaced by a different mechanism in the future. | |
lanpltrusted | boolean | 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 may 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 (see the DO command). Zero if anonymous 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 for the language. |
Parent topic: System Catalogs Definitions
