PostgreSQL 9.2.1 Documentation
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# ALTER AGGREGATE

## Name

ALTER AGGREGATE -- change the definition of an aggregate function

## Synopsis

    ALTER AGGREGATE name ( argtype [ , ... ] ) RENAME TO new_name
    ALTER AGGREGATE name ( argtype [ , ... ] ) OWNER TO new_owner
    ALTER AGGREGATE name ( argtype [ , ... ] ) SET SCHEMA new_schema

## Description

`ALTER AGGREGATE` changes the definition of an aggregate function.

You must own the aggregate function to use `ALTER AGGREGATE`. To change the schema of an aggregate function, you must also have `CREATE` privilege on the new schema. To alter the owner, you must also be a direct or indirect member of the new owning role, and that role must have `CREATE` privilege on the aggregate function's schema. (These restrictions enforce that altering the owner doesn't do anything you couldn't do by dropping and recreating the aggregate function. However, a superuser can alter ownership of any aggregate function anyway.)

## Parameters

`name`

  The name (optionally schema-qualified) of an existing aggregate function.

`argtype`

  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.

`new_name`

  The new name of the aggregate function.

`new_owner`

  The new owner of the aggregate function.

`new_schema`

  The new schema for the aggregate function.

## Examples

To rename the aggregate function `myavg` for type `integer` to `my_average`:

    ALTER AGGREGATE myavg(integer) RENAME TO my_average;

To change the owner of the aggregate function `myavg` for type `integer` to `joe`:

    ALTER AGGREGATE myavg(integer) OWNER TO joe;

To move the aggregate function `myavg` for type `integer` into schema `myschema`:

    ALTER AGGREGATE myavg(integer) SET SCHEMA myschema;

## Compatibility

There is no `ALTER AGGREGATE` statement in the SQL standard.

## See Also

CREATE AGGREGATE, DROP AGGREGATE

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