ALTER SUBSCRIPTION — change the definition of a subscription
ALTER SUBSCRIPTIONnameCONNECTION 'conninfo' ALTER SUBSCRIPTIONnameSET PUBLICATIONpublication_name[, ...] [ WITH (publication_option[=value] [, ... ] ) ] ALTER SUBSCRIPTIONnameADD PUBLICATIONpublication_name[, ...] [ WITH (publication_option[=value] [, ... ] ) ] ALTER SUBSCRIPTIONnameDROP PUBLICATIONpublication_name[, ...] [ WITH (publication_option[=value] [, ... ] ) ] ALTER SUBSCRIPTIONnameREFRESH PUBLICATION [ WITH (refresh_option[=value] [, ... ] ) ] ALTER SUBSCRIPTIONnameENABLE ALTER SUBSCRIPTIONnameDISABLE ALTER SUBSCRIPTIONnameSET (subscription_parameter[=value] [, ... ] ) ALTER SUBSCRIPTIONnameSKIP (skip_option=value) ALTER SUBSCRIPTIONnameOWNER TO {new_owner| CURRENT_ROLE | CURRENT_USER | SESSION_USER } ALTER SUBSCRIPTIONnameRENAME TOnew_name
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. These commands also cannot be executed when the subscription has two_phase commit enabled, unless copy_data is false. See column subtwophasestate of pg_subscription to know the actual two-phase state.
nameThe name of a subscription whose properties are to be altered.
CONNECTION 'conninfo'This clause replaces the connection string originally set by CREATE SUBSCRIPTION. See there for more information.
SET PUBLICATION publication_nameADD PUBLICATION publication_nameDROP PUBLICATION publication_nameThese forms change 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. We allow non-existent publications to be specified in ADD and SET variants so that users can add those later. 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 PUBLICATIONFetch missing table information from publisher. This will start replication of tables that were added to the subscribed-to publications since CREATE SUBSCRIPTION or the last invocation of REFRESH PUBLICATION.
refresh_option specifies additional options for the refresh operation. The supported options are:
copy_data (boolean)Specifies whether to copy pre-existing data in the publications that are being subscribed to when the replication starts. The default is true.
Previously subscribed tables are not copied, even if a table's row filter WHERE clause has since been modified.
ENABLEEnables a previously disabled subscription, starting the logical replication worker at the end of the transaction.
DISABLEDisables a running subscription, stopping the logical replication worker at the end of the 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, streaming, and disable_on_error.
SKIP ( skip_option = value )Skips applying all changes of the remote transaction. If incoming data violates any constraints, logical replication will stop until it is resolved. By using the ALTER SUBSCRIPTION ... SKIP command, the logical replication worker skips all data modification changes within the transaction. This option has no effect on the transactions that are already prepared by enabling two_phase on subscriber. After the logical replication worker successfully skips the transaction or finishes a transaction, the LSN (stored in pg_subscription.subskiplsn) is cleared. See Section 31.5 for the details of logical replication conflicts. Using this command requires superuser privilege.
skip_option specifies options for this operation. The supported option is:
lsn (pg_lsn)Specifies the finish LSN of the remote transaction whose changes are to be skipped by the logical replication worker. The finish LSN is the LSN at which the transaction is either committed or prepared. Skipping individual subtransactions is not supported. Setting NONE resets the LSN.
new_ownerThe user name of the new owner of the subscription.
new_nameThe new name for the subscription.
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;
ALTER SUBSCRIPTION is a PostgreSQL extension.
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