DROP AGGREGATE — remove an aggregate function
DROP AGGREGATE [ IF EXISTS ]name(aggregate_signature) [, ...] [ CASCADE | RESTRICT ] whereaggregate_signatureis: * | [argmode] [argname]argtype[ , ... ] | [ [argmode] [argname]argtype[ , ... ] ] ORDER BY [argmode] [argname]argtype[ , ... ]
DROP AGGREGATE removes an existing
aggregate function. To execute this command the current
user must be the owner of the aggregate function.
IF EXISTSDo not throw an error if the aggregate does not exist. A notice is issued in this case.
nameThe 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 argument specifications.
To reference an ordered-set aggregate function, write
ORDER BY between the direct and aggregated argument
specifications.
CASCADEAutomatically drop objects that depend on the aggregate function (such as views using it), and in turn all objects that depend on those objects (see Section 5.13).
RESTRICTRefuse to drop the aggregate function if any objects depend on it. This is the default.
Alternative syntaxes for referencing ordered-set aggregates are described under ALTER AGGREGATE.
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");
To remove multiple aggregate functions in one command:
DROP AGGREGATE myavg(integer), myavg(bigint);
There is no DROP AGGREGATE statement in the SQL
standard.