ALTER SERVICE (Transact-SQL)
Applies to: 
SQL Server
Azure SQL Managed Instance
Changes an existing service.
Transact-SQL syntax conventions
Syntax
ALTER SERVICE service_name
[ ON QUEUE [ schema_name . ]queue_name ]
[ ( < opt_arg > [ , ...n ] ) ]
[ ; ]
<opt_arg> ::=
ADD CONTRACT contract_name | DROP CONTRACT contract_name
Arguments
service_name
Is the name of the service to change. Server, database, and schema names cannot be specified.
ON QUEUE [ schema_name. ] queue_name
Specifies the new queue for this service. Service Broker moves all messages for this service from the current queue to the new queue.
ADD CONTRACT contract_name
Specifies a contract to add to the contract set exposed by this service.
DROP CONTRACT contract_name
Specifies a contract to delete from the contract set exposed by this service. Service Broker sends an error message on any existing conversations with this service that use this contract.
Remarks
When the ALTER SERVICE statement deletes a contract from a service, the service can no longer be a target for conversations that use that contract. Therefore, Service Broker does not allow new conversations to the service on that contract. Existing conversations that use the contract are unaffected.
To alter the AUTHORIZATION for a service, use the ALTER AUTHORIZATION statement.
Permissions
Permission for altering a service defaults to the owner of the service, members of the db_ddladmin or db_owner fixed database roles, and members of the sysadmin fixed server role.
Examples
A. Changing the queue for a service
The following example changes the //Adventure-Works.com/Expenses service to use the queue NewQueue.
ALTER SERVICE [//Adventure-Works.com/Expenses]
ON QUEUE NewQueue ;
B. Adding a new contract to the service
The following example changes the //Adventure-Works.com/Expenses service to allow dialogs on the contract //Adventure-Works.com/Expenses.
ALTER SERVICE [//Adventure-Works.com/Expenses]
(ADD CONTRACT [//Adventure-Works.com/Expenses/ExpenseSubmission]) ;
C. Adding a new contract to the service, dropping existing contract
The following example changes the //Adventure-Works.com/Expenses service to allow dialogs on the contract //Adventure-Works.com/Expenses/ExpenseProcessing and to disallow dialogs on the contract //Adventure-Works.com/Expenses/ExpenseSubmission.
ALTER SERVICE [//Adventure-Works.com/Expenses]
(ADD CONTRACT [//Adventure-Works.com/Expenses/ExpenseProcessing],
DROP CONTRACT [//Adventure-Works.com/Expenses/ExpenseSubmission]) ;
D. Altering the owner of a service
The following example changes the owner of //Adventure-Works.com/Expenses to the dbo user.
ALTER AUTHORIZATION ON SERVICE::[//Adventure-Works.com/Expenses] TO dbo ;
GO