44.21. pg_language

The catalog pg_language registers languages in which you can write functions or stored procedures. See CREATE LANGUAGE and Chapter 37 for more information about language handlers.

Table 44-21. pg_language Columns

lannamename Name of the language
lanowneroidpg_authid.oidOwner of the language
lanisplbool  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
lanpltrustedbool  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
lanplcallfoidoidpg_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
lanvalidatoroidpg_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
lanaclaclitem[]  Access privileges; see GRANT and REVOKE for details