pg_language
The pg_language system catalog table registers languages in which you can write functions or stored procedures. It is populated by CREATE LANGUAGE.
Table 1. pg_catalog.pg_language
| column | type | references | description |
|---|---|---|---|
lanname |
name | Name 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. |
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. |