Name
ALTER EXTENSION -- change the definition of an extensionSynopsis
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 | TRANSFORM FOR type_name LANGUAGE lang_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.
See Section 36.15 for more information about these operations.
You must own the extension to use ALTER EXTENSION
. The ADD
/DROP
forms require ownership of the added/dropped object as well.
Parameters
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
, orVARIADIC
. If omitted, the default isIN
. Note thatALTER EXTENSION
does not actually pay any attention toOUT
arguments, since only the input arguments are needed to determine the function's identity. So it is sufficient to list theIN
,INOUT
, andVARIADIC
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.
type_name
-
The name of the data type of the transform.
lang_name
-
The name of the language of the transform.
Examples
To update the hstore
extension to version 2.0:
ALTER EXTENSION hstore UPDATE TO '2.0';
To change the schema of the hstore
extension to utils
:
ALTER EXTENSION hstore SET SCHEMA utils;
To add an existing function to the hstore
extension:
ALTER EXTENSION hstore ADD FUNCTION populate_record(anyelement, hstore);
Compatibility
ALTER EXTENSION
is a PostgreSQL extension.
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