DROP AGGREGATE
Synopsis
DROP AGGREGATE [ IF EXISTS ]name (aggregate_signature ) [ CASCADE | RESTRICT ]whereaggregate_signature is:* |[argmode ] [argname ]argtype [ , ... ] |[ [argmode ] [argname ]argtype [ , ... ] ] ORDER BY [argmode ] [argname ]argtype [ , ... ]Description
DROP AGGREGATE removes 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 orVARIADIC. If omitted, the default isIN.
- argname
The name of an argument. Note thatDROP 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 argument specifications. To reference an ordered-set aggregate function, writeORDER 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 underALTER AGGREGATE.
Examples
To remove the aggregate functionmyavg for typeinteger:
DROP AGGREGATE myavg(integer);
To remove the hypothetical-set aggregate functionmyrank, which takes an arbitrary list of ordering columns and a matching list of direct arguments:
DROP AGGREGATE myrank(VARIADIC "any" ORDER BY VARIADIC "any");