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'\" t
.\" Title: ALTER POLICY
.\" Author: The PostgreSQL Global Development Group
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\" Date: 2024
.\" Manual: PostgreSQL 15.6 Documentation
.\" Source: PostgreSQL 15.6
.\" Language: English
.\"
.TH "ALTER POLICY" "7" "2024" "PostgreSQL 15.6" "PostgreSQL 15.6 Documentation"
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.SH "NAME"
ALTER_POLICY \- change the definition of a row\-level security policy
.SH "SYNOPSIS"
.sp
.nf
ALTER POLICY \fIname\fR ON \fItable_name\fR RENAME TO \fInew_name\fR
ALTER POLICY \fIname\fR ON \fItable_name\fR
[ TO { \fIrole_name\fR | PUBLIC | CURRENT_ROLE | CURRENT_USER | SESSION_USER } [, \&.\&.\&.] ]
[ USING ( \fIusing_expression\fR ) ]
[ WITH CHECK ( \fIcheck_expression\fR ) ]
.fi
.SH "DESCRIPTION"
.PP
\fBALTER POLICY\fR
changes the definition of an existing row\-level security policy\&. Note that
\fBALTER POLICY\fR
only allows the set of roles to which the policy applies and the
USING
and
WITH CHECK
expressions to be modified\&. To change other properties of a policy, such as the command to which it applies or whether it is permissive or restrictive, the policy must be dropped and recreated\&.
.PP
To use
\fBALTER POLICY\fR, you must own the table that the policy applies to\&.
.PP
In the second form of
\fBALTER POLICY\fR, the role list,
\fIusing_expression\fR, and
\fIcheck_expression\fR
are replaced independently if specified\&. When one of those clauses is omitted, the corresponding part of the policy is unchanged\&.
.SH "PARAMETERS"
.PP
\fIname\fR
.RS 4
The name of an existing policy to alter\&.
.RE
.PP
\fItable_name\fR
.RS 4
The name (optionally schema\-qualified) of the table that the policy is on\&.
.RE
.PP
\fInew_name\fR
.RS 4
The new name for the policy\&.
.RE
.PP
\fIrole_name\fR
.RS 4
The role(s) to which the policy applies\&. Multiple roles can be specified at one time\&. To apply the policy to all roles, use
PUBLIC\&.
.RE
.PP
\fIusing_expression\fR
.RS 4
The
USING
expression for the policy\&. See
CREATE POLICY (\fBCREATE_POLICY\fR(7))
for details\&.
.RE
.PP
\fIcheck_expression\fR
.RS 4
The
WITH CHECK
expression for the policy\&. See
CREATE POLICY (\fBCREATE_POLICY\fR(7))
for details\&.
.RE
.SH "COMPATIBILITY"
.PP
\fBALTER POLICY\fR
is a
PostgreSQL
extension\&.
.SH "SEE ALSO"
CREATE POLICY (\fBCREATE_POLICY\fR(7)), DROP POLICY (\fBDROP_POLICY\fR(7))
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