sys.servers (Transact-SQL)

THIS TOPIC APPLIES TO:yesSQL Server (starting with 2008)noAzure SQL DatabasenoAzure SQL Data Warehouse noParallel Data Warehouse

Contains a row per linked or remote server registered, and a row for the local server that has server_id = 0.

Column name Data type Description
server_id int Local ID of linked server.
name sysname When server_id = 0, this is the server name.

When server_id >0 , this is the local name of linked server.
product sysname Product name of the linked server. "SQL Server" indicates this is another instance of SQL Server.
provider sysname OLE DB provider name for connecting to linked server.
data_source nvarchar(4000) OLE DB data source connection property.
location nvarchar(4000) OLE DB location connection property. NULL if none.
provider_string nvarchar(4000) OLE DB provider-string connection property.

Is NULL unless the caller has the ALTER ANY LINKED SERVER permission.
catalog sysname OLEDB catalog connection property. NULL if none.
connect_timeout int Connect time-out in seconds, 0 if none.
query_timeout int Query time-out in seconds, 0 if none.
is_linked bit 0 = Is an old-style server added by using sp_addserver, with different RPC and distributed-transaction behavior.

1 = Standard linked server.
is_remote_login_enabled bit RPC option is set enabling incoming remote logins for this server.
is_rpc_out_enabled bit Outgoing (from this server) RPC is enabled.
is_data_access_enabled bit Server is enabled for distributed queries.
is_collation_compatible bit Collation of remote data is assumed to be compatible with local data if no collation information is available.
uses_remote_collation bit If 1, use the collation reported by the remote server; otherwise, use the collation specified by the next column.
collation_name sysname Name of collation to use, or NULL if just use local.
lazy_schema_validation bit If 1, schema validation is not checked at query startup.
is_system bit This server can be accessed only by the internal system.
is_publisher bit Server is a replication Publisher.
is_subscriber bit Server is a replication Subscriber.
is_distributor bit Server is a replication Distributor.
is_nonsql_subscriber bit Server is a non-SQL Server replication Subscriber.
is_remote_proc_transaction_promotion_enabled bit If 1, calling a remote stored procedure starts a distributed transaction and enlists the transaction with MS DTC. For more information, see sp_serveroption (Transact-SQL).
modify_date datetime Date that server information was last changed.

Permissions

The value in provider_string is always NULL unless the caller has the ALTER ANY LINKED SERVER permission.

Permissions are not required to view the local server (server_id = 0).

When you create a linked or remote server, SQL Server creates a default login mapping to the public server role. This means that by default, all logins can view all linked and remote servers. To restrict visibility to these servers, remove the default login mapping by executing sp_droplinkedsrvlogin and specifying NULL for the locallogin parameter.

If the default login mapping is deleted, only users that have been explicitly added as a linked login or remote login can view the linked or remote servers for which they have a login. To view all linked and remote servers after the default login mapping is deleted requires the following permissions:

  • ALTER ANY LINKED SERVER or ALTER ANY LOGIN ON SERVER

  • Membership in the setupadmin or sysadmin fixed server roles

See Also

Catalog Views (Transact-SQL)
Linked Servers Catalog Views (Transact-SQL)
sp_addlinkedsrvlogin (Transact-SQL)
sp_addremotelogin (Transact-SQL)