sp_helplinkedsrvlogin (Transact-SQL)

Provides information about login mappings defined against a specific linked server used for distributed queries and remote stored procedures.

Transact-SQL Syntax Conventions

Syntax

sp_helplinkedsrvlogin [ [ @rmtsrvname = ] 'rmtsrvname' ] 
     [ , [ @locallogin = ] 'locallogin' ]

Arguments

• [ @rmtsrvname=] 'rmtsrvname'
  Is the name of the linked server that the login mapping applies to. rmtsrvname is sysname, with a default of NULL. If NULL, all login mappings defined against all the linked servers defined in the local computer running SQL Server are returned.

• [ @locallogin=] 'locallogin'
  Is the SQL Server login on the local server that has a mapping to the linked server rmtsrvname. locallogin is sysname, with a default of NULL. NULL specifies that all login mappings defined on rmtsrvname are returned. If not NULL, a mapping for locallogin to rmtsrvname must already exist. locallogin can be a SQL Server login or a Windows user. The Windows user must have been granted access to SQL Server either directly or through its membership in a Windows group that has been granted access.

Return Code Values

0 (success) or 1 (failure)

Result Sets

Column name	Data type	Description
Linked Server	sysname	Linked server name.
Local Login	sysname	Local login for which the mapping applies.
Is Self Mapping	smallint	0 = Local Login is mapped to Remote Login when connecting to Linked Server. 1 = Local Login is mapped to the same login and password when connecting to Linked Server.
Remote Login	sysname	Login name on Linked Server that is mapped to Local Login when Is Self Mapping is 0. If Is Self Mapping is 1, Remote Login is NULL.

Remarks

Before you delete login mappings, use sp_helplinkedsrvlogin to determine the linked servers that are involved.

Permissions

No permissions are checked.

Examples

A. Displaying all login mappings for all linked servers

The following example displays all login mappings for all linked servers defined on the local computer running SQL Server.

EXEC sp_helplinkedsrvlogin;
GO

Here is the result set.

Linked Server    Local Login   Is Self Mapping Remote Login 
---------------- ------------- --------------- -------------- 
Accounts         NULL          1               NULL
Sales            NULL          1               NULL
Sales            Mary          0               sa
Marketing        NULL          1               NULL

(4 row(s) affected)

B. Displaying all login mappings for a linked server

The following example displays all locally defined login mappings for the Sales linked server.

EXEC sp_helplinkedsrvlogin 'Sales';
GO

Here is the result set.

Linked Server    Local Login   Is Self Mapping Remote Login 
---------------- ------------- --------------- -------------- 
Sales            NULL          1               NULL
Sales            Mary          0               sa

(2 row(s) affected)

C. Displaying all login mappings for a local login

The following example displays all locally defined login mappings for the login Mary.

EXEC sp_helplinkedsrvlogin NULL, 'Mary';
GO

Here is the result set.

Linked Server    Local Login   Is Self Mapping Remote Login 
---------------- ------------- --------------- -------------- 
Sales            NULL          1               NULL
Sales            Mary          0               sa

(2 row(s) affected)

See Also

Reference

Security Stored Procedures (Transact-SQL)

sp_addlinkedserver (Transact-SQL)

sp_droplinkedsrvlogin (Transact-SQL)

System Stored Procedures (Transact-SQL)