The catalog pg_language registers
languages in which you can write functions or stored procedures.
See CREATE LANGUAGE
and Chapter 36 for more information about language handlers.
Table 43-20. pg_language Columns
|Name of the language
| 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
| 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
| 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
| 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
| Access privileges; see