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DROP ROUTINE(7) PostgreSQL 16.9 Documentation DROP ROUTINE(7)
NAME
DROP_ROUTINE - remove a routine
SYNOPSIS
DROP ROUTINE [ IF EXISTS ] name [ ( [ [ argmode ] [ argname ] argtype [, ...] ] ) ] [, ...]
[ CASCADE | RESTRICT ]
DESCRIPTION
DROP ROUTINE removes the definition of one or more existing routines.
The term "routine" includes aggregate functions, normal functions, and
procedures. See under DROP AGGREGATE (DROP_AGGREGATE(7)), DROP FUNCTION
(DROP_FUNCTION(7)), and DROP PROCEDURE (DROP_PROCEDURE(7)) for the
description of the parameters, more examples, and further details.
NOTES
The lookup rules used by DROP ROUTINE are fundamentally the same as for
DROP PROCEDURE; in particular, DROP ROUTINE shares that command's
behavior of considering an argument list that has no argmode markers to
be possibly using the SQL standard's definition that OUT arguments are
included in the list. (DROP AGGREGATE and DROP FUNCTION do not do
that.)
In some cases where the same name is shared by routines of different
kinds, it is possible for DROP ROUTINE to fail with an ambiguity error
when a more specific command (DROP FUNCTION, etc.) would work.
Specifying the argument type list more carefully will also resolve such
problems.
These lookup rules are also used by other commands that act on existing
routines, such as ALTER ROUTINE and COMMENT ON ROUTINE.
EXAMPLES
To drop the routine foo for type integer:
DROP ROUTINE foo(integer);
This command will work independent of whether foo is an aggregate,
function, or procedure.
COMPATIBILITY
This command conforms to the SQL standard, with these PostgreSQL
extensions:
o The standard only allows one routine to be dropped per command.
o The IF EXISTS option is an extension.
o The ability to specify argument modes and names is an extension,
and the lookup rules differ when modes are given.
o User-definable aggregate functions are an extension.
SEE ALSO
DROP AGGREGATE (DROP_AGGREGATE(7)), DROP FUNCTION (DROP_FUNCTION(7)),
DROP PROCEDURE (DROP_PROCEDURE(7)), ALTER ROUTINE (ALTER_ROUTINE(7))
Note that there is no CREATE ROUTINE command.
PostgreSQL 16.9 2025 DROP ROUTINE(7)
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