Επεξεργασία

Κοινή χρήση μέσω

sp_addpullsubscription (Transact-SQL)

  • Άρθρο

Applies to: SQL Server Azure SQL Managed Instance

Adds a pull subscription to a snapshot or transactional publication. This stored procedure is executed at the Subscriber on the database where the pull subscription is to be created.

Transact-SQL syntax conventions

Syntax

sp_addpullsubscription
    [ @publisher = ] N'publisher'
    [ , [ @publisher_db = ] N'publisher_db' ]
    , [ @publication = ] N'publication'
    [ , [ @independent_agent = ] N'independent_agent' ]
    [ , [ @subscription_type = ] N'subscription_type' ]
    [ , [ @description = ] N'description' ]
    [ , [ @update_mode = ] N'update_mode' ]
    [ , [ @immediate_sync = ] immediate_sync ]
[ ; ]

Arguments

[ @publisher = ] N'publisher'

The name of the Publisher. @publisher is sysname, with no default.

Note

Server name can be specified as <Hostname>,<PortNumber> for a default instance or <Hostname>\<InstanceName>,<PortNumber> for a named instance. Specify the port number for your connection when SQL Server is deployed on Linux or Windows with a custom port, and the browser service is disabled. The use of custom port numbers for remote distributor applies to SQL Server 2019 (15.x) and later versions.

[ @publisher_db = ] N'publisher_db'

The name of the Publisher database. @publisher_db is sysname, with a default of NULL. @publisher_db is ignored by Oracle Publishers.

[ @publication = ] N'publication'

The name of the publication. @publication is sysname, with no default.

[ @independent_agent = ] N'independent_agent'

Specifies if there's a stand-alone Distribution Agent for this publication. @independent_agent is nvarchar(5), with a default of true.

  • If true, there's a stand-alone Distribution Agent for this publication.
  • If false, there's one Distribution Agent for each Publisher database/Subscriber database pair.

@independent_agent is a property of the publication and must have the same value as the Publisher.

[ @subscription_type = ] N'subscription_type'

The type of subscription. @subscription_type is nvarchar(9), with a default of anonymous. You must specify a value of pull for @subscription_type, unless you want to create a subscription without registering the subscription at the Publisher. In this case, you must specify a value of anonymous. This is necessary for cases in which you can't establish a SQL Server connection to the Publisher during subscription configuration.

[ @description = ] N'description'

The description of the publication. @description is nvarchar(100), with a default of NULL.

[ @update_mode = ] N'update_mode'

The type of update. @update_mode is nvarchar(30), and can be one of the following values.

Value Description
read only (default) The subscription is read-only. Any changes at the Subscriber aren't sent back to the Publisher. Should be used when updates aren't made at the Subscriber.
synctran Enables support for immediate updating subscriptions.
queued tran Enables the subscription for queued updating. Data modifications can be made at the Subscriber, stored in a queue, and then propagated to the Publisher.
failover Enables the subscription for immediate updating with queued updating as a failover. Data modifications can be made at the Subscriber and propagated to the Publisher immediately. If the Publisher and Subscriber aren't connected, data modifications made at the Subscriber can be stored in a queue until the Subscriber and Publisher are reconnected.
queued failover Note: Not supported for Oracle Publishers.

Enables the subscription as a queued updating subscription with the ability to change to immediate updating mode. Data modifications can be made at the Subscriber and stored in a queue until a connection is established between the Subscriber and Publisher. When a continuous connection is established the updating mode can be changed to immediate updating.

[ @immediate_sync = ] immediate_sync

Specifies whether the synchronization files are created or re-created each time the Snapshot Agent runs. @immediate_sync is bit, with a default of 1, and must be set to the same value as @immediate_sync in sp_addpublication. @immediate_sync is a property of the publication and must have the same value as the Publisher.

Return code values

0 (success) or 1 (failure).

Remarks

sp_addpullsubscription is used in snapshot replication and transactional replication.

Important

For queued updating subscriptions, use SQL Server Authentication for connections to Subscribers, and specify a different account for the connection to each Subscriber. When creating a pull subscription that supports queued updating, replication always sets the connection to use Windows Authentication (for pull subscriptions, replication can't access metadata at the Subscriber required to use SQL Server Authentication). In this case, you should execute sp_changesubscription to change the connection to use SQL Server Authentication after the subscription is configured.

If the MSreplication_subscriptions table doesn't exist at the Subscriber, sp_addpullsubscription creates it. It also adds a row to the MSreplication_subscriptions table. For pull subscriptions, sp_addsubscription should be called at the Publisher first.

Examples

-- This script uses sqlcmd scripting variables. They are in the form
-- $(MyVariable). For information about how to use scripting variables  
-- on the command line and in SQL Server Management Studio, see the 
-- "Executing Replication Scripts" section in the topic
-- "Programming Replication Using System Stored Procedures".

-- Execute this batch at the Subscriber.
DECLARE @publication AS sysname;
DECLARE @publisher AS sysname;
DECLARE @publicationDB AS sysname;
SET @publication = N'AdvWorksProductTran';
SET @publisher = $(PubServer);
SET @publicationDB = N'AdventureWorks2022';

-- At the subscription database, create a pull subscription 
-- to a transactional publication.
USE [AdventureWorks2022Replica]
EXEC sp_addpullsubscription 
  @publisher = @publisher, 
  @publication = @publication, 
  @publisher_db = @publicationDB;

-- Add an agent job to synchronize the pull subscription.
EXEC sp_addpullsubscription_agent 
  @publisher = @publisher, 
  @publisher_db = @publicationDB, 
  @publication = @publication, 
  @distributor = @publisher, 
  @job_login = $(Login), 
  @job_password = $(Password);
GO

Permissions

Only members of the sysadmin fixed server role or db_owner fixed database role can execute sp_addpullsubscription.

Related content