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Wiki / SQL Commands

ALTER POLICY

change the definition of a row-level security policy

English manual coverage begins with PostgreSQL 6.4. Source history and runtime observations have their own recorded version boundaries.

Reading PG 18·Select a recorded version

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anchor
SQL-ALTERPOLICY
file
sql-alterpolicy.html
lang
en
name
ALTER POLICY
purpose
change the definition of a row-level security policy
purpose zh
更改一条行级安全策略的定义
sections same as
Unknown
slug
18
synopsis text
ALTER POLICY name ON table_name RENAME TO new_name ALTER POLICY name ON table_name [ TO { role_name | PUBLIC | CURRENT_ROLE | CURRENT_USER | SESSION_USER } [, ...] ] [ USING ( using_expression ) ] [ WITH CHECK ( check_expression ) ]

Syntax

ALTER POLICY name ON table_name RENAME TO new_name

ALTER POLICY name ON table_name
[ TO { role_name | PUBLIC | CURRENT_ROLE | CURRENT_USER | SESSION_USER } [, ...] ]
[ USING ( using_expression ) ]
[ WITH CHECK ( check_expression ) ]
Syntax diagrams

Read left to right. Branches are choices, bypasses are optional, loops repeat. Select an underlined parameter to open its rule.

ALTER POLICY name ON table_name RENAME TO new_name
ALTER POLICY · Syntax 2
ALTER POLICY name ON table_name TO role_name PUBLIC CURRENT_ROLE CURRENT_USER SESSION_USER , USING ( using_expression ) WITH CHECK ( check_expression )

Definition PG 18

ALTER POLICY name ON table_name RENAME TO new_name

ALTER POLICY name ON table_name
[ TO { role_name | PUBLIC | CURRENT_ROLE | CURRENT_USER | SESSION_USER } [, ...] ]
[ USING ( using_expression ) ]
[ WITH CHECK ( check_expression ) ]

Description

ALTER POLICY changes the definition of an existing row-level security policy. Note that ALTER POLICY 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.

To use ALTER POLICY, you must own the table that the policy applies to.

In the second form of ALTER POLICY, the role list, using_expression, and check_expression are replaced independently if specified. When one of those clauses is omitted, the corresponding part of the policy is unchanged.

Parameters

name

The name of an existing policy to alter.

table_name

The name (optionally schema-qualified) of the table that the policy is on.

new_name

The new name for the policy.

role_name

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.

using_expression

The USING expression for the policy. See CREATE POLICY for details.

check_expression

The WITH CHECK expression for the policy. See CREATE POLICY for details.

Compatibility

ALTER POLICY is a PostgreSQL extension.

See Also

CREATE POLICY, DROP POLICY

Compare versions

Complete source facts

synopsis html

ALTER POLICY <em class="replaceable"><code>name</code></em> ON <em class="replaceable"><code>table_name</code></em> RENAME TO <em class="replaceable"><code>new_name</code></em>

ALTER POLICY <em class="replaceable"><code>name</code></em> ON <em class="replaceable"><code>table_name</code></em>
    [ TO { <em class="replaceable"><code>role_name</code></em> | PUBLIC | CURRENT_ROLE | CURRENT_USER | SESSION_USER } [, ...] ]
    [ USING ( <em class="replaceable"><code>using_expression</code></em> ) ]
    [ WITH CHECK ( <em class="replaceable"><code>check_expression</code></em> ) ]

Source references

Full definition and evidence JSON

Definition sources

center · PostgreSQL 18 · wiki-repair-20261023:8da0b246a88df46443426adf24d23b85a91ee414dda362547ba2bec1b1fcec83

Text language: en · wiki-repair-20261023:8da0b246a88df46443426adf24d23b85a91ee414dda362547ba2bec1b1fcec83