ALTER SUBSCRIPTIONALTER SUBSCRIPTION7SQL - Language StatementsALTER SUBSCRIPTIONchange the definition of a subscription
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 SKIP ( skip_option = value )
ALTER SUBSCRIPTION name OWNER TO { new_owner | CURRENT_ROLE | CURRENT_USER | SESSION_USER }
ALTER SUBSCRIPTION name RENAME TO new_nameDescriptionALTER SUBSCRIPTION can change most of the subscription
properties that can be specified
in .
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
.
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.
Parametersname
The name of a subscription whose properties are to be altered.
CONNECTION 'conninfo'
This clause replaces the connection string originally set by
. See there for more
information.
SET PUBLICATION publication_nameADD PUBLICATION publication_nameDROP PUBLICATION publication_name
These 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
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 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.
ENABLE
Enables a previously disabled subscription, starting the logical
replication worker at the end of the transaction.
DISABLE
Disables 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
. 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 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_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;
CompatibilityALTER SUBSCRIPTION is a PostgreSQL
extension.
See Also