In SQL Server, the CREATE ROUTE statement is used to define a new route for Service Broker, which enables reliable messaging between different SQL Server instances. A route specifies the location of a Service Broker service in another database, including its network address and the local Service Broker service name that it should communicate with.
Here's the general syntax for the CREATE ROUTE statement:
CREATE ROUTE route_name
WITH
SERVICE_NAME = 'service_name',
BROKER_INSTANCE = 'broker_instance',
ADDRESS = 'tcp://hostname:port';
Parameters:
- route_name: The name you want to give to the route.
- SERVICE_NAME: The name of the target service that the route communicates with.
- BROKER_INSTANCE: (Optional) The instance of the Service Broker in the other database. This is typically used to specify a unique Service Broker instance.
- ADDRESS: The network address (TCP/IP or HTTP) of the services where the messages will be sent.
Example:
Here is an example of how to create a route:
USE your_database; -- Replace with your database name
CREATE ROUTE MyRoute
WITH
SERVICE_NAME = 'MyTargetService',
ADDRESS = 'tcp://192.168.1.100:4040';
Key Points:
1. Local Service: Make sure you have created a target service (using CREATE SERVICE) that corresponds to the SERVICE_NAME specified in the route.
2. Security Configuration: Ensure that the Service Broker security (including the necessary permissions and user configurations) is properly set up for message exchange.
3. Multiple Routes: If you plan on having multiple routes pointing to the same service, be careful with the routing priority and ensure that your routes are managed correctly.
4. Distributed Transactions: When working with remote databases, be aware of potential issues with distributed transactions.
After creating the route, you can use it for message sending through the specified service. Always test your configuration in a controlled environment to ensure that it behaves as expected before deploying to a production environment.