ALTER SUBSCRIPTION
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## ALTER SUBSCRIPTION

ALTER SUBSCRIPTION — change the definition of a subscription

## Synopsis

    ALTER SUBSCRIPTION name CONNECTION 'conninfo'
    ALTER SUBSCRIPTION name SET PUBLICATION publication_name [, ...] [ WITH ( publication_option [= value] [, ... ] ) ]
    ALTER SUBSCRIPTION name ADD PUBLICATION publication_name [, ...] [ WITH ( publication_option [= value] [, ... ] ) ]
    ALTER SUBSCRIPTION name DROP PUBLICATION publication_name [, ...] [ WITH ( publication_option [= value] [, ... ] ) ]
    ALTER SUBSCRIPTION name REFRESH PUBLICATION [ WITH ( refresh_option [= value] [, ... ] ) ]
    ALTER SUBSCRIPTION name ENABLE
    ALTER SUBSCRIPTION name DISABLE
    ALTER SUBSCRIPTION name SET ( subscription_parameter [= value] [, ... ] )
    ALTER SUBSCRIPTION name OWNER TO { new_owner | CURRENT_ROLE | CURRENT_USER | SESSION_USER }
    ALTER SUBSCRIPTION name RENAME TO new_name

## Description

`ALTER SUBSCRIPTION` can change most of the subscription properties that can be specified in CREATE SUBSCRIPTION.

You must own the subscription to use `ALTER SUBSCRIPTION`. To alter the owner, you must also be a direct or indirect member of the new owning role. The new owner has to be a superuser. (Currently, all subscription owners must be superusers, so the owner checks will be bypassed in practice. But this might change in the future.)

When refreshing a publication we remove the relations that are no longer part of the publication and we also remove the table synchronization slots if there are any. It is necessary to remove these slots so that the resources allocated for the subscription on the remote host are released. If due to network breakdown or some other error, PostgreSQL is unable to remove the slots, an ERROR will be reported. To proceed in this situation, the user either needs to retry the operation or disassociate the slot from the subscription and drop the subscription as explained in DROP SUBSCRIPTION.

Commands `ALTER SUBSCRIPTION ... REFRESH PUBLICATION` and `ALTER SUBSCRIPTION ... {SET|ADD|DROP} PUBLICATION ...` with `refresh` option as `true` cannot be executed inside a transaction block.

## Parameters

`name`

  The name of a subscription whose properties are to be altered.

`CONNECTION '`conninfo`'`

  This clause alters the connection property originally set by CREATE SUBSCRIPTION. See there for more information.

`SET PUBLICATION `publication_name``
`ADD PUBLICATION `publication_name``
`DROP PUBLICATION `publication_name``

  Changes the list of subscribed publications. `SET` replaces the entire list of publications with a new list, `ADD` adds additional publications to the list of publications, and `DROP` removes the publications from the list of publications. See CREATE SUBSCRIPTION for more information. By default, this command will also act like `REFRESH PUBLICATION`.

  `publication_option` specifies additional options for this operation. The supported options are:

  `refresh` (`boolean`)

    When false, the command will not try to refresh table information. `REFRESH PUBLICATION` should then be executed separately. The default is `true`.

  Additionally, the options described under `REFRESH PUBLICATION` may be specified, to control the implicit refresh operation.

`REFRESH PUBLICATION`

  Fetch missing table information from publisher. This will start replication of tables that were added to the subscribed-to publications since the last invocation of `REFRESH PUBLICATION` or since `CREATE SUBSCRIPTION`.

  `refresh_option` specifies additional options for the refresh operation. The supported options are:

  `copy_data` (`boolean`)

    Specifies whether the existing data in the publications that are being subscribed to should be copied once the replication starts. The default is `true`. (Previously subscribed tables are not copied.)

`ENABLE`

  Enables the previously disabled subscription, starting the logical replication worker at the end of transaction.

`DISABLE`

  Disables the running subscription, stopping the logical replication worker at the end of transaction.

`SET ( `subscription_parameter` [= `value`] [, ... ] )`

  This clause alters parameters originally set by CREATE SUBSCRIPTION. See there for more information. The parameters that can be altered are `slot_name`, `synchronous_commit`, `binary`, and `streaming`.

`new_owner`

  The user name of the new owner of the subscription.

`new_name`

  The new name for the subscription.

## Examples

Change the publication subscribed by a subscription to `insert_only`:

    ALTER SUBSCRIPTION mysub SET PUBLICATION insert_only;

Disable (stop) the subscription:

    ALTER SUBSCRIPTION mysub DISABLE;

## Compatibility

`ALTER SUBSCRIPTION` is a PostgreSQL extension.

## See Also

CREATE SUBSCRIPTION, DROP SUBSCRIPTION, CREATE PUBLICATION, ALTER PUBLICATION

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