ALTER 
EXTENSION(7)					  PostgreSQL 9.2.7 Documentation					ALTER EXTENSION(7)

NAME

       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 agg_name (agg_type [, ...] ) |
	 CAST (source_type AS target_type) |
	 COLLATION object_name |
	 CONVERSION object_name |
	 DOMAIN object_name |
	 FOREIGN DATA WRAPPER object_name |
	 FOREIGN TABLE object_name |
	 FUNCTION function_name ( [ [ argmode ] [ argname ] argtype [, ...] ] ) |
	 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

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 35.15, "Packaging Related Objects into an Extension", in the documentation 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, agg_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.

       agg_type
	   An input data type on which the aggregate function operates. To reference a zero-argument aggregate function, write * in place of the
	   list of input data types.

       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 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 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(s) of the function's arguments (optionally schema-qualified), if any.

       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

       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.

SEE ALSO

       CREATE EXTENSION (CREATE_EXTENSION(7)), DROP EXTENSION (DROP_EXTENSION(7))

PostgreSQL 9.2.7						    2014-02-17							ALTER EXTENSION(7)