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📄 ABORT.7(2.17 KB)
📄 ALTER_AGGREGATE.7(4.97 KB)
📄 ALTER_COLLATION.7(2.8 KB)
📄 ALTER_CONVERSION.7(2.89 KB)
📄 ALTER_DATABASE.7(5.71 KB)
📄 ALTER_DEFAULT_PRIVILEGES.7(6.34 KB)
📄 ALTER_DOMAIN.7(6.96 KB)
📄 ALTER_EVENT_TRIGGER.7(2.42 KB)
📄 ALTER_EXTENSION.7(6.89 KB)
📄 ALTER_FOREIGN_DATA_WRAPPER.7(4.56 KB)
📄 ALTER_FOREIGN_TABLE.7(12.8 KB)
📄 ALTER_FUNCTION.7(8.26 KB)
📄 ALTER_GROUP.7(3.08 KB)
📄 ALTER_INDEX.7(5.59 KB)
📄 ALTER_LANGUAGE.7(2.1 KB)
📄 ALTER_LARGE_OBJECT.7(1.97 KB)
📄 ALTER_MATERIALIZED_VIEW.7(4.66 KB)
📄 ALTER_OPERATOR.7(3.67 KB)
📄 ALTER_OPERATOR_CLASS.7(2.86 KB)
📄 ALTER_OPERATOR_FAMILY.7(9.12 KB)
📄 ALTER_POLICY.7(2.88 KB)
📄 ALTER_ROLE.7(9.04 KB)
📄 ALTER_RULE.7(2.21 KB)
📄 ALTER_SCHEMA.7(2.31 KB)
📄 ALTER_SEQUENCE.7(7.53 KB)
📄 ALTER_SERVER.7(3.41 KB)
📄 ALTER_SYSTEM.7(3.8 KB)
📄 ALTER_TABLE.7(35.2 KB)
📄 ALTER_TABLESPACE.7(3.35 KB)
📄 ALTER_TEXT_SEARCH_CONFIGURATION.7(4.79 KB)
📄 ALTER_TEXT_SEARCH_DICTIONARY.7(4.02 KB)
📄 ALTER_TEXT_SEARCH_PARSER.7(2.23 KB)
📄 ALTER_TEXT_SEARCH_TEMPLATE.7(2.26 KB)
📄 ALTER_TRIGGER.7(2.98 KB)
📄 ALTER_TYPE.7(7.15 KB)
📄 ALTER_USER.7(2.66 KB)
📄 ALTER_USER_MAPPING.7(3.26 KB)
📄 ALTER_VIEW.7(4.67 KB)
📄 ANALYZE.7(7.67 KB)
📄 BEGIN.7(4.06 KB)
📄 CHECKPOINT.7(2.29 KB)
📄 CLOSE.7(2.72 KB)
📄 CLUSTER.7(6.23 KB)
📄 COMMENT.7(10.2 KB)
📄 COMMIT.7(2.1 KB)
📄 COMMIT_PREPARED.7(2.58 KB)
📄 COPY.7(29.88 KB)
📄 CREATE_ACCESS_METHOD.7(2.9 KB)
📄 CREATE_AGGREGATE.7(23.35 KB)
📄 CREATE_CAST.7(13.55 KB)
📄 CREATE_COLLATION.7(3.97 KB)
📄 CREATE_CONVERSION.7(3.78 KB)
📄 CREATE_DATABASE.7(8.48 KB)
📄 CREATE_DOMAIN.7(6.52 KB)
📄 CREATE_EVENT_TRIGGER.7(3.74 KB)
📄 CREATE_EXTENSION.7(6.57 KB)
📄 CREATE_FOREIGN_DATA_WRAPPER.7(4.96 KB)
📄 CREATE_FOREIGN_TABLE.7(9 KB)
📄 CREATE_FUNCTION.7(24.73 KB)
📄 CREATE_GROUP.7(2.11 KB)
📄 CREATE_INDEX.7(19.56 KB)
📄 CREATE_LANGUAGE.7(9.83 KB)
📄 CREATE_MATERIALIZED_VIEW.7(4.21 KB)
📄 CREATE_OPERATOR.7(6.88 KB)
📄 CREATE_OPERATOR_CLASS.7(8.52 KB)
📄 CREATE_OPERATOR_FAMILY.7(3.6 KB)
📄 CREATE_POLICY.7(15.92 KB)
📄 CREATE_ROLE.7(12.69 KB)
📄 CREATE_RULE.7(8.63 KB)
📄 CREATE_SCHEMA.7(6.15 KB)
📄 CREATE_SEQUENCE.7(9.79 KB)
📄 CREATE_SERVER.7(3.63 KB)
📄 CREATE_TABLE.7(42.1 KB)
📄 CREATE_TABLESPACE.7(4.47 KB)
📄 CREATE_TABLE_AS.7(7.8 KB)
📄 CREATE_TEXT_SEARCH_CONFIGURATION.7(3.19 KB)
📄 CREATE_TEXT_SEARCH_DICTIONARY.7(3.34 KB)
📄 CREATE_TEXT_SEARCH_PARSER.7(3.56 KB)
📄 CREATE_TEXT_SEARCH_TEMPLATE.7(3.38 KB)
📄 CREATE_TRANSFORM.7(5.79 KB)
📄 CREATE_TRIGGER.7(16.3 KB)
📄 CREATE_TYPE.7(28.96 KB)
📄 CREATE_USER.7(2.45 KB)
📄 CREATE_USER_MAPPING.7(3.27 KB)
📄 CREATE_VIEW.7(14.63 KB)
📄 DEALLOCATE.7(1.98 KB)
📄 DECLARE.7(10.22 KB)
📄 DELETE.7(7.36 KB)
📄 DISCARD.7(2.81 KB)
📄 DO.7(3.08 KB)
📄 DROP_ACCESS_METHOD.7(2.35 KB)
📄 DROP_AGGREGATE.7(3.8 KB)
📄 DROP_CAST.7(2.26 KB)
📄 DROP_COLLATION.7(2.42 KB)
📄 DROP_CONVERSION.7(2.36 KB)
📄 DROP_DATABASE.7(2.38 KB)
📄 DROP_DOMAIN.7(2.34 KB)
📄 DROP_EVENT_TRIGGER.7(2.38 KB)
📄 DROP_EXTENSION.7(2.73 KB)
📄 DROP_FOREIGN_DATA_WRAPPER.7(2.61 KB)
📄 DROP_FOREIGN_TABLE.7(2.59 KB)
📄 DROP_FUNCTION.7(3.35 KB)
📄 DROP_GROUP.7(1.57 KB)
📄 DROP_INDEX.7(3.08 KB)
📄 DROP_LANGUAGE.7(2.86 KB)
📄 DROP_MATERIALIZED_VIEW.7(2.64 KB)
📄 DROP_OPERATOR.7(3.01 KB)
📄 DROP_OPERATOR_CLASS.7(3.48 KB)
📄 DROP_OPERATOR_FAMILY.7(3.24 KB)
📄 DROP_OWNED.7(3.14 KB)
📄 DROP_POLICY.7(2.53 KB)
📄 DROP_ROLE.7(3.05 KB)
📄 DROP_RULE.7(2.35 KB)
📄 DROP_SCHEMA.7(2.76 KB)
📄 DROP_SEQUENCE.7(2.46 KB)
📄 DROP_SERVER.7(2.39 KB)
📄 DROP_TABLE.7(2.97 KB)
📄 DROP_TABLESPACE.7(2.48 KB)
📄 DROP_TEXT_SEARCH_CONFIGURATION.7(2.83 KB)
📄 DROP_TEXT_SEARCH_DICTIONARY.7(2.75 KB)
📄 DROP_TEXT_SEARCH_PARSER.7(2.66 KB)
📄 DROP_TEXT_SEARCH_TEMPLATE.7(2.69 KB)
📄 DROP_TRANSFORM.7(2.59 KB)
📄 DROP_TRIGGER.7(2.6 KB)
📄 DROP_TYPE.7(2.53 KB)
📄 DROP_USER.7(1.65 KB)
📄 DROP_USER_MAPPING.7(2.56 KB)
📄 DROP_VIEW.7(2.43 KB)
📄 END.7(2.19 KB)
📄 EXECUTE.7(2.9 KB)
📄 EXPLAIN.7(13.03 KB)
📄 FETCH.7(8.48 KB)
📄 GRANT.7(21.29 KB)
📄 IMPORT_FOREIGN_SCHEMA.7(3.98 KB)
📄 INSERT.7(19.61 KB)
📄 LISTEN.7(3.51 KB)
📄 LOAD.7(2.54 KB)
📄 LOCK.7(8.01 KB)
📄 MOVE.7(2.92 KB)
📄 NOTIFY.7(8.21 KB)
📄 PREPARE.7(8.2 KB)
📄 PREPARE_TRANSACTION.7(5.74 KB)
📄 REASSIGN_OWNED.7(3.01 KB)
📄 REFRESH_MATERIALIZED_VIEW.7(3.92 KB)
📄 REINDEX.7(7.69 KB)
📄 RELEASE_SAVEPOINT.7(3 KB)
📄 RESET.7(2.93 KB)
📄 REVOKE.7(10.44 KB)
📄 ROLLBACK.7(2.09 KB)
📄 ROLLBACK_PREPARED.7(2.6 KB)
📄 ROLLBACK_TO_SAVEPOINT.7(3.94 KB)
📄 SAVEPOINT.7(3.5 KB)
📄 SECURITY_LABEL.7(5.39 KB)
📄 SELECT.7(63.33 KB)
📄 SELECT_INTO.7(4.37 KB)
📄 SET.7(7.57 KB)
📄 SET_CONSTRAINTS.7(4.48 KB)
📄 SET_ROLE.7(4.36 KB)
📄 SET_SESSION_AUTHORIZATION.7(3.88 KB)
📄 SET_TRANSACTION.7(8.27 KB)
📄 SHOW.7(4.22 KB)
📄 START_TRANSACTION.7(2.9 KB)
📄 TABLE.7(18 B)
📄 TRUNCATE.7(6.39 KB)
📄 UNLISTEN.7(2.75 KB)
📄 UPDATE.7(12.26 KB)
📄 VACUUM.7(7.92 KB)
📄 VALUES.7(6.94 KB)
📄 WITH.7(18 B)

Editing: ALTER_FUNCTION.7

'\" t
.\"     Title: ALTER FUNCTION
.\"    Author: The PostgreSQL Global Development Group
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: 2018
.\"    Manual: PostgreSQL 9.6.9 Documentation
.\"    Source: PostgreSQL 9.6.9
.\"  Language: English
.\"
.TH "ALTER FUNCTION" "7" "2018" "PostgreSQL 9.6.9" "PostgreSQL 9.6.9 Documentation"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
ALTER_FUNCTION \- change the definition of a function
.SH "SYNOPSIS"
.sp
.nf
ALTER FUNCTION \fIname\fR ( [ [ \fIargmode\fR ] [ \fIargname\fR ] \fIargtype\fR [, \&.\&.\&.] ] )
    \fIaction\fR [ \&.\&.\&. ] [ RESTRICT ]
ALTER FUNCTION \fIname\fR ( [ [ \fIargmode\fR ] [ \fIargname\fR ] \fIargtype\fR [, \&.\&.\&.] ] )
    RENAME TO \fInew_name\fR
ALTER FUNCTION \fIname\fR ( [ [ \fIargmode\fR ] [ \fIargname\fR ] \fIargtype\fR [, \&.\&.\&.] ] )
    OWNER TO { \fInew_owner\fR | CURRENT_USER | SESSION_USER }
ALTER FUNCTION \fIname\fR ( [ [ \fIargmode\fR ] [ \fIargname\fR ] \fIargtype\fR [, \&.\&.\&.] ] )
    SET SCHEMA \fInew_schema\fR
ALTER FUNCTION \fIname\fR ( [ [ \fIargmode\fR ] [ \fIargname\fR ] \fIargtype\fR [, \&.\&.\&.] ] )
    DEPENDS ON EXTENSION \fIextension_name\fR

where \fIaction\fR is one of:

CALLED ON NULL INPUT | RETURNS NULL ON NULL INPUT | STRICT
    IMMUTABLE | STABLE | VOLATILE | [ NOT ] LEAKPROOF
    [ EXTERNAL ] SECURITY INVOKER | [ EXTERNAL ] SECURITY DEFINER
    PARALLEL { UNSAFE | RESTRICTED | SAFE }
    COST \fIexecution_cost\fR
    ROWS \fIresult_rows\fR
    SET \fIconfiguration_parameter\fR { TO | = } { \fIvalue\fR | DEFAULT }
    SET \fIconfiguration_parameter\fR FROM CURRENT
    RESET \fIconfiguration_parameter\fR
    RESET ALL
.fi
.SH "DESCRIPTION"
.PP
\fBALTER FUNCTION\fR
changes the definition of a function\&.
.PP
You must own the function to use
\fBALTER FUNCTION\fR\&. To change a function\*(Aqs schema, you must also have
CREATE
privilege on the new schema\&. To alter the owner, you must also be a direct or indirect member of the new owning role, and that role must have
CREATE
privilege on the function\*(Aqs schema\&. (These restrictions enforce that altering the owner doesn\*(Aqt do anything you couldn\*(Aqt do by dropping and recreating the function\&. However, a superuser can alter ownership of any function anyway\&.)
.SH "PARAMETERS"
.PP
\fIname\fR
.RS 4
The name (optionally schema\-qualified) of an existing function\&.
.RE
.PP
\fIargmode\fR
.RS 4
The mode of an argument:
IN,
OUT,
INOUT, or
VARIADIC\&. If omitted, the default is
IN\&. Note that
\fBALTER FUNCTION\fR
does not actually pay any attention to
OUT
arguments, since only the input arguments are needed to determine the function\*(Aqs identity\&. So it is sufficient to list the
IN,
INOUT, and
VARIADIC
arguments\&.
.RE
.PP
\fIargname\fR
.RS 4
The name of an argument\&. Note that
\fBALTER FUNCTION\fR
does not actually pay any attention to argument names, since only the argument data types are needed to determine the function\*(Aqs identity\&.
.RE
.PP
\fIargtype\fR
.RS 4
The data type(s) of the function\*(Aqs arguments (optionally schema\-qualified), if any\&.
.RE
.PP
\fInew_name\fR
.RS 4
The new name of the function\&.
.RE
.PP
\fInew_owner\fR
.RS 4
The new owner of the function\&. Note that if the function is marked
SECURITY DEFINER, it will subsequently execute as the new owner\&.
.RE
.PP
\fInew_schema\fR
.RS 4
The new schema for the function\&.
.RE
.PP
\fIextension_name\fR
.RS 4
The name of the extension that the function is to depend on\&.
.RE
.PP
CALLED ON NULL INPUT
.br
RETURNS NULL ON NULL INPUT
.br
STRICT
.RS 4
CALLED ON NULL INPUT
changes the function so that it will be invoked when some or all of its arguments are null\&.
RETURNS NULL ON NULL INPUT
or
STRICT
changes the function so that it is not invoked if any of its arguments are null; instead, a null result is assumed automatically\&. See
CREATE FUNCTION (\fBCREATE_FUNCTION\fR(7))
for more information\&.
.RE
.PP
IMMUTABLE
.br
STABLE
.br
VOLATILE
.RS 4
Change the volatility of the function to the specified setting\&. See
CREATE FUNCTION (\fBCREATE_FUNCTION\fR(7))
for details\&.
.RE
.PP
[ EXTERNAL ] SECURITY INVOKER
.br
[ EXTERNAL ] SECURITY DEFINER
.RS 4
Change whether the function is a security definer or not\&. The key word
EXTERNAL
is ignored for SQL conformance\&. See
CREATE FUNCTION (\fBCREATE_FUNCTION\fR(7))
for more information about this capability\&.
.RE
.PP
PARALLEL
.RS 4
Change whether the function is deemed safe for parallelism\&. See
CREATE FUNCTION (\fBCREATE_FUNCTION\fR(7))
for details\&.
.RE
.PP
LEAKPROOF
.RS 4
Change whether the function is considered leakproof or not\&. See
CREATE FUNCTION (\fBCREATE_FUNCTION\fR(7))
for more information about this capability\&.
.RE
.PP
COST \fIexecution_cost\fR
.RS 4
Change the estimated execution cost of the function\&. See
CREATE FUNCTION (\fBCREATE_FUNCTION\fR(7))
for more information\&.
.RE
.PP
ROWS \fIresult_rows\fR
.RS 4
Change the estimated number of rows returned by a set\-returning function\&. See
CREATE FUNCTION (\fBCREATE_FUNCTION\fR(7))
for more information\&.
.RE
.PP
\fIconfiguration_parameter\fR
.br
\fIvalue\fR
.RS 4
Add or change the assignment to be made to a configuration parameter when the function is called\&. If
\fIvalue\fR
is
DEFAULT
or, equivalently,
RESET
is used, the function\-local setting is removed, so that the function executes with the value present in its environment\&. Use
RESET ALL
to clear all function\-local settings\&.
SET FROM CURRENT
saves the value of the parameter that is current when
\fBALTER FUNCTION\fR
is executed as the value to be applied when the function is entered\&.
.sp
See
\fBSET\fR(7)
and
Chapter 19, Server Configuration, in the documentation
for more information about allowed parameter names and values\&.
.RE
.PP
RESTRICT
.RS 4
Ignored for conformance with the SQL standard\&.
.RE
.SH "EXAMPLES"
.PP
To rename the function
sqrt
for type
integer
to
square_root:
.sp
.if n \{\
.RS 4
.\}
.nf
ALTER FUNCTION sqrt(integer) RENAME TO square_root;
.fi
.if n \{\
.RE
.\}
.PP
To change the owner of the function
sqrt
for type
integer
to
joe:
.sp
.if n \{\
.RS 4
.\}
.nf
ALTER FUNCTION sqrt(integer) OWNER TO joe;
.fi
.if n \{\
.RE
.\}
.PP
To change the schema of the function
sqrt
for type
integer
to
maths:
.sp
.if n \{\
.RS 4
.\}
.nf
ALTER FUNCTION sqrt(integer) SET SCHEMA maths;
.fi
.if n \{\
.RE
.\}
.PP
To mark the function
sqrt
for type
integer
as being dependent on the extension
mathlib:
.sp
.if n \{\
.RS 4
.\}
.nf
ALTER FUNCTION sqrt(integer) DEPENDS ON EXTENSION mathlib;
.fi
.if n \{\
.RE
.\}
.PP
To adjust the search path that is automatically set for a function:
.sp
.if n \{\
.RS 4
.\}
.nf
ALTER FUNCTION check_password(text) SET search_path = admin, pg_temp;
.fi
.if n \{\
.RE
.\}
.PP
To disable automatic setting of
\fIsearch_path\fR
for a function:
.sp
.if n \{\
.RS 4
.\}
.nf
ALTER FUNCTION check_password(text) RESET search_path;
.fi
.if n \{\
.RE
.\}
.sp
The function will now execute with whatever search path is used by its caller\&.
.SH "COMPATIBILITY"
.PP
This statement is partially compatible with the
\fBALTER FUNCTION\fR
statement in the SQL standard\&. The standard allows more properties of a function to be modified, but does not provide the ability to rename a function, make a function a security definer, attach configuration parameter values to a function, or change the owner, schema, or volatility of a function\&. The standard also requires the
RESTRICT
key word, which is optional in
PostgreSQL\&.
.SH "SEE ALSO"
CREATE FUNCTION (\fBCREATE_FUNCTION\fR(7)), DROP FUNCTION (\fBDROP_FUNCTION\fR(7))

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Editing: ALTER_FUNCTION.7

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