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ALTER EXTENSION

Change the definition of an extension.

Synopsis

ALTER EXTENSION <name> UPDATE [ TO <new_version> ]

ALTER EXTENSION <name> SET SCHEMA <new_schema>

ALTER EXTENSION <name> ADD <member_object>

ALTER EXTENSION <name> DROP <member_object>

where member_object is:

  AGGREGATE <aggregate_name> ( <aggregate_signature> ) |
  CAST (<source_type> AS <target_type>) |
  COLLATION <object_name> |
  CONVERSION <object_name> |
  DOMAIN <object_name> |
  EVENT TRIGGER <object_name> |
  FOREIGN DATA WRAPPER <object_name> |
  FOREIGN TABLE <object_name> |
  FUNCTION <function_name> ( [ [ <argmode> ] [ <argname> ] <argtype> [, ...] ] ) |
  MATERIALIZED VIEW <object_name> |
  OPERATOR <operator_name> (<left_type>, <right_type>) |
  OPERATOR CLASS <object_name> USING <index_method> |
  OPERATOR FAMILY <object_name> USING <index_method> |
  [ PROCEDURAL ] LANGUAGE <object_name> |
  SCHEMA <object_name> |
  SEQUENCE <object_name> |
  SERVER <object_name> |
  TABLE <object_name> |
  TEXT SEARCH CONFIGURATION <object_name> |
  TEXT SEARCH DICTIONARY <object_name> |
  TEXT SEARCH PARSER <object_name> |
  TEXT SEARCH TEMPLATE <object_name> |
  TYPE <object_name> |
  VIEW <object_name>

and aggregate_signature is:

* |
[ <argmode> ] [ <argname> ] <argtype> [ , ... ] |
[ [ <argmode> ] [ <argname> ] <argtype> [ , ... ] ] ORDER BY [ <argmode> ] [ <argname> ] <argtype> [ , ... ]

Description

ALTER EXTENSION changes the definition of an installed extension. There are several subforms:

  • UPDATE — this form updates the extension to a newer version. The extension must supply a suitable update script (or series of scripts) that can modify the currently-installed version into the requested version.

  • SET SCHEMA — this form moves the extension’s objects into another schema. The extension has to be relocatable for this command to succeed.

  • ADD member_object — this form adds an existing object to the extension. This is mainly useful in extension update scripts. The object will subsequently be treated as a member of the extension; notably, it can only be dropped by dropping the extension.

  • DROP member_object — this form removes a member object from the extension. This is mainly useful in extension update scripts. The object is not dropped, only disassociated from the extension.

You must own the extension to use ALTER EXTENSION. The ADD/DROP forms require ownership of the added/dropped object as well.

Parameters

Parameter Description

name

The name of an installed extension

new_version

The desired new version of the extension. This can be written as either an identifier or a string literal. If not specified, ALTER EXTENSION UPDATE attempts to update to whatever is shown as the default version in the extension’s control file

new_schema

The new schema for the extension

object_name, aggregate_name, function_name, operator_name

The name of an object to be added to or removed from the extension. Names of tables, aggregates, domains, foreign tables, functions, operators, operator classes, operator families, sequences, text search objects, types, and views can be schema-qualified

source_type

The name of the source data type of the cast

target_type

The name of the target data type of the cast

argmode

The mode of a function or aggregate argument: IN, OUT, INOUT, or VARIADIC. If omitted, the default is IN. Note that ALTER EXTENSION does not actually pay any attention to OUT arguments, since only the input arguments are needed to determine the function’s identity. So it is sufficient to list the IN, INOUT, and VARIADIC arguments

argname

The name of a function or aggregate argument. Note that ALTER EXTENSION does not actually pay any attention to argument names, since only the argument data types are needed to determine the function’s identity

argtype

The data type of a function or aggregate argument

left_type, right_type

The data type(s) of the operator’s arguments (optionally schema-qualified). Write NONE for the missing argument of a prefix or postfix operator

PROCEDURAL

This is a noise word

Examples

Update the hstore extension to version 2.0:

ALTER EXTENSION hstore UPDATE TO '2.0';

Change the schema of the hstore extension to utils:

ALTER EXTENSION hstore SET SCHEMA utils;

Add an existing function to the hstore extension:

ALTER EXTENSION hstore ADD FUNCTION populate_record(anyelement, hstore);

Compatibility

ALTER EXTENSION is a PostgreSQL extension.

See also

Previous
ALTER DOMAIN
Next
ALTER EXTERNAL TABLE