Table 42-20. pg_language Columns
|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||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; see GRANT and REVOKE for details.|
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