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41.18. pg_language

The catalog pg_language registers languages in which you can write functions or stored procedures. See CREATE LANGUAGE and Chapter 34 for more information about language handlers.

Table 41-18. pg_language Columns

Name Type References Description
lanname name   Name 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 may be replaced by a different mechanism sometime.
lanpltrusted bool   This is a trusted language. If this is an internal language (lanispl is false) then this column is meaningless.
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; see GRANT and REVOKE for details.