1DROP FUNCTION(7)        PostgreSQL 9.2.24 Documentation       DROP FUNCTION(7)
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NAME

6       DROP_FUNCTION - remove a function
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SYNOPSIS

9       DROP FUNCTION [ IF EXISTS ] name ( [ [ argmode ] [ argname ] argtype [, ...] ] )
10           [ CASCADE | RESTRICT ]
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DESCRIPTION

13       DROP FUNCTION removes the definition of an existing function. To
14       execute this command the user must be the owner of the function. The
15       argument types to the function must be specified, since several
16       different functions can exist with the same name and different argument
17       lists.
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PARAMETERS

20       IF EXISTS
21           Do not throw an error if the function does not exist. A notice is
22           issued in this case.
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24       name
25           The name (optionally schema-qualified) of an existing function.
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27       argmode
28           The mode of an argument: IN, OUT, INOUT, or VARIADIC. If omitted,
29           the default is IN. Note that DROP FUNCTION does not actually pay
30           any attention to OUT arguments, since only the input arguments are
31           needed to determine the function's identity. So it is sufficient to
32           list the IN, INOUT, and VARIADIC arguments.
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34       argname
35           The name of an argument. Note that DROP FUNCTION does not actually
36           pay any attention to argument names, since only the argument data
37           types are needed to determine the function's identity.
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39       argtype
40           The data type(s) of the function's arguments (optionally
41           schema-qualified), if any.
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43       CASCADE
44           Automatically drop objects that depend on the function (such as
45           operators or triggers).
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47       RESTRICT
48           Refuse to drop the function if any objects depend on it. This is
49           the default.
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EXAMPLES

52       This command removes the square root function:
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54           DROP FUNCTION sqrt(integer);
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COMPATIBILITY

57       A DROP FUNCTION statement is defined in the SQL standard, but it is not
58       compatible with this command.
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SEE ALSO

61       CREATE FUNCTION (CREATE_FUNCTION(7)), ALTER FUNCTION
62       (ALTER_FUNCTION(7))
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66PostgreSQL 9.2.24                 2017-11-06                  DROP FUNCTION(7)
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