xenial (7) DROP_AGGREGATE.7.gz

NAME

       DROP_AGGREGATE - remove 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 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 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.

       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
       (ALTER_AGGREGATE(7)).

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.

SEE ALSO

       ALTER AGGREGATE (ALTER_AGGREGATE(7)), CREATE AGGREGATE (CREATE_AGGREGATE(7))