CREATE SUBSCRIPTION

Function

CREATE SUBSCRIPTION adds a new subscription to the current database. The subscription name must be different from a name of any existing subscription in the database. A subscription represents a replication for connecting to the publication side.

Precautions

• This statement is supported by version 8.2.0.100 or later clusters.
• A subscription can be created only by the system administrator.

Syntax

1
2
3
4

CREATE SUBSCRIPTION name
    CONNECTION 'conninfo'
    PUBLICATION publication_name [, ...]
    [ WITH ( subscription_parameter [= value] [, ... ] ) ]

Parameter Description

• name

  Specifies the name of a subscription.

  Value range: A string. It must comply with the naming convention.

• conninfo

  Specifies the string for connecting to the publication side.

  Example: host=1.1.1.1,2.2.2.2 port=10000,20000 dbname=postgres user=repusr1 password=password_123

  • host

    IP address of the publication side. You can specify the IP addresses of both the primary and standby nodes of the publication side. Separate the IP addresses with commas (,).

  • port

    The publication port cannot be the primary port. Instead, it must be the primary port number plus 1. Otherwise, the port number conflicts with the thread pool. You can specify the ports of both the primary and standby nodes of the publication side. Separate the ports with commas (,).

    

    The number of hosts must be the same as that of ports.

  • dbname

    Specifies the database where a publication is deployed.

  • user and password

    Specifies the username and password used to connect to the publication side. The user has the system administrator permission (SYSADMIN) or O&M administrator permission (OPRADMIN).

• publication_name

  Specifies the name of the publication you want to subscribe to on the publication side. A subscription corresponds to multiple publications.

• WITH ( subscription_parameter [= value] [, ... ] )

  Specifies the optional parameters for a subscription. The following parameters are supported:

  • enabled

    Specifies whether a subscription should be actively replicated, or whether it should be just set but not started.

    The value can be true or false.

    The default value is true.

  • create_slot

    Specifies whether a replication slot is created on the publisher.

    The value can be true or false.

    The default value is true.

  • slot_name

    Specifies the name of the replication slot.

    Value range: a string

    Default value: the subscription name

Examples

CREATE SUBSCRIPTION mysub
    CONNECTION 'host=192.168.1.50 port=5432 user=foo dbname=foodb password=xxxx'
    PUBLICATION mypublication;

Helpful Links

ALTER SUBSCRIPTION DROP SUBSCRIPTION