ALTER PUBLICATION

ALTER PUBLICATION
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ALTER PUBLICATION — change the definition of a publication

Synopsis

ALTER PUBLICATION name ADD publication_object [, ...]
ALTER PUBLICATION name DROP publication_drop_object [, ...]
ALTER PUBLICATION name SET { publication_object [, ...] | publication_all_object [, ... ] }
ALTER PUBLICATION name SET ( publication_parameter [= value] [, ... ] )
ALTER PUBLICATION name OWNER TO { new_owner | CURRENT_ROLE | CURRENT_USER | SESSION_USER }
ALTER PUBLICATION name RENAME TO new_name

where publication_object is one of:

    TABLE table_and_columns [, ... ]
    TABLES IN SCHEMA { schema_name | CURRENT_SCHEMA } [, ... ]

and publication_all_object is one of:

    ALL TABLES [ EXCEPT ( except_table_object [, ... ] ) ]
    ALL SEQUENCES

and publication_drop_object is one of:

    TABLE table_object [, ... ]
    TABLES IN SCHEMA { schema_name | CURRENT_SCHEMA } [, ... ]

and table_and_columns is:

    table_object [ ( column_name [, ... ] ) ] [ WHERE ( expression ) ]

and except_table_object is:

    TABLE table_object [, ... ]

and table_object is:

   [ ONLY ] table_name [ * ]

Description

The command ALTER PUBLICATION can change the attributes of a publication.

The first two variants modify which tables/schemas are part of the publication. The ADD and DROP clauses will add and remove one or more tables/schemas from the publication.

The third variant either modifies the included tables/schemas or marks the publication as FOR ALL SEQUENCES or FOR ALL TABLES, optionally using EXCEPT to exclude specific tables. The SET ALL TABLES clause can transform an empty publication, or one defined for ALL SEQUENCES (or both ALL TABLES and ALL SEQUENCES), into a publication defined for ALL TABLES. Likewise, SET ALL SEQUENCES can convert an empty publication, or one defined for ALL TABLES (or both ALL TABLES and ALL SEQUENCES), into a publication defined for ALL SEQUENCES. In addition, SET ALL TABLES can be used to update the tables specified in the EXCEPT clause of a FOR ALL TABLES publication. If EXCEPT is specified with a list of tables, the existing exclusion list is replaced with the specified tables. If EXCEPT is omitted, the existing exclusion list is cleared. The SET clause, when used with a publication defined with FOR TABLE or FOR TABLES IN SCHEMA, replaces the list of tables/schemas in the publication with the specified list; the existing tables or schemas that were present in the publication will be removed.

Note that adding tables/except tables/schemas to a publication that is already subscribed to will require an ALTER SUBSCRIPTION ... REFRESH PUBLICATION action on the subscribing side in order to become effective. Likewise altering a publication to set ALL TABLES or to set or unset ALL SEQUENCES also requires the subscriber to refresh the publication. Note also that DROP TABLES IN SCHEMA will not drop any schema tables that were specified using FOR TABLE/ ADD TABLE.

The fourth variant of this command listed in the synopsis can change all of the publication properties specified in CREATE PUBLICATION. Properties not mentioned in the command retain their previous settings.

The remaining variants change the owner and the name of the publication.

You must own the publication to use ALTER PUBLICATION. Adding a table to a publication additionally requires owning that table. The ADD TABLES IN SCHEMA, SET TABLES IN SCHEMA, SET ALL TABLES, and SET ALL SEQUENCES to a publication requires the invoking user to be a superuser. To alter the owner, you must be able to SET ROLE to the new owning role, and that role must have CREATE privilege on the database. Also, the new owner of a FOR TABLES IN SCHEMA or FOR ALL TABLES or FOR ALL SEQUENCES publication must be a superuser. However, a superuser can change the ownership of a publication regardless of these restrictions.

Adding/Setting any schema when the publication also publishes a table with a column list, and vice versa is not supported.

Parameters

name

The name of an existing publication whose definition is to be altered.

table_name

Name of an existing table. If ONLY is specified before the table name, only that table is affected. If ONLY is not specified, the table and all its descendant tables (if any) are affected. Optionally, * can be specified after the table name to explicitly indicate that descendant tables are included.

Optionally, a column list can be specified. See CREATE PUBLICATION for details. Note that a subscription having several publications in which the same table has been published with different column lists is not supported. See Warning: Combining Column Lists from Multiple Publications for details of potential problems when altering column lists.

If the optional WHERE clause is specified, rows for which the expression evaluates to false or null will not be published. Note that parentheses are required around the expression. The expression is evaluated with the role used for the replication connection.

schema_name

Name of an existing schema.

SET ( publication_parameter [= value] [, ... ] )

This clause alters publication parameters originally set by CREATE PUBLICATION. See there for more information. This clause is not applicable to sequences.

Caution

Altering the publish_via_partition_root parameter can lead to data loss or duplication at the subscriber because it changes the identity and schema of the published tables. Note this happens only when a partition root table is specified as the replication target.

This problem can be avoided by refraining from modifying partition leaf tables after the ALTER PUBLICATION ... SET until the ALTER SUBSCRIPTION ... REFRESH PUBLICATION is executed and by only refreshing using the copy_data = off option.

new_owner

The user name of the new owner of the publication.

new_name

The new name for the publication.

Examples

Change the publication to publish only deletes and updates:

ALTER PUBLICATION noinsert SET (publish = 'update, delete');

Add some tables to the publication:

ALTER PUBLICATION mypublication ADD TABLE users (user_id, firstname), departments;

Change the set of columns published for a table:

ALTER PUBLICATION mypublication SET TABLE users (user_id, firstname, lastname), TABLE departments;

Replace the table list in the publication's EXCEPT clause:

ALTER PUBLICATION mypublication SET ALL TABLES EXCEPT (TABLE users, departments);

Reset the publication to be a FOR ALL TABLES publication with no excluded tables:

ALTER PUBLICATION mypublication SET ALL TABLES;

Add schemas marketing and sales to the publication sales_publication:

ALTER PUBLICATION sales_publication ADD TABLES IN SCHEMA marketing, sales;

Add tables users, departments and schema production to the publication production_publication:

ALTER PUBLICATION production_publication ADD TABLE users, departments, TABLES IN SCHEMA production;

Compatibility

ALTER PUBLICATION is a PostgreSQL extension.