DROP AGGREGATE

DROP AGGREGATE

Removes an aggregate function.

Synopsis

DROP AGGREGATE [IF EXISTS] name ( aggregate_signature ) [CASCADE | RESTRICT]

where aggregate_signature is:

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

Description

DROP AGGREGATE will delete an existing aggregate function. To execute this command the current user must be the owner of the aggregate function.

Parameters

IF EXISTS
Do not throw an error if the aggregate does not exist. A notice is issued in this case.
name
The name (optionally schema-qualified) of an existing aggregate function.
argmode
The mode of an argument: IN or VARIADIC. If omitted, the default is IN.
argname
The name of an argument. Note that DROP AGGREGATE does not actually pay any attention to argument names, since only the argument data types are needed to determine the aggregate function's identity.
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. To reference an ordered-set aggregate function, write ORDER BY between the direct and aggregated argument specifications.
CASCADE
Automatically drop objects that depend on the aggregate function.
RESTRICT
Refuse to drop the aggregate function if any objects depend on it. This is the default.

Notes

Alternative syntaxes for referencing ordered-set aggregates are described under ALTER AGGREGATE.

Examples

To remove the aggregate function myavg for type integer:

DROP AGGREGATE myavg(integer);

To remove the hypothetical-set aggregate function myrank, which takes an arbitrary list of ordering columns and a matching list of direct arguments:

DROP AGGREGATE myrank(VARIADIC "any" ORDER BY VARIADIC "any");

Compatibility

There is no DROP AGGREGATE statement in the SQL standard.