| --- |
| title: pg_language |
| --- |
| |
| <!-- |
| Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you under the Apache License, Version 2.0 (the |
| "License"); you may not use this file except in compliance |
| with the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, |
| software distributed under the License is distributed on an |
| "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| KIND, either express or implied. See the License for the |
| specific language governing permissions and limitations |
| under the License. |
| --> |
| |
| The `pg_language` system catalog table registers languages in which you can write functions or stored procedures. It is populated by `CREATE LANGUAGE`. |
| |
| <a id="topic1__gs143898"></a> |
| <span class="tablecap">Table 1. pg\_catalog.pg\_language</span> |
| |
| | 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. | |
| |
| |
| |
| |
