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@@LOCK_TIMEOUT (Transact-SQL)

Applies To: SQL Server 2014, SQL Server 2016 Preview

Topic Status: Some information in this topic is preview and subject to change in future releases. Preview information describes new features or changes to existing features in Microsoft SQL Server 2016 Community Technology Preview 2 (CTP2).

Returns the current lock time-out setting in milliseconds for the current session.

Applies to: SQL Server (SQL Server 2008 through current version), Azure SQL Database.

Topic link icon Transact-SQL Syntax Conventions

@@LOCK_TIMEOUT

SET LOCK_TIMEOUT allows an application to set the maximum time that a statement waits on a blocked resource. When a statement has waited longer than the LOCK_TIMEOUT setting, the blocked statement is automatically canceled, and an error message is returned to the application.

@@LOCK_TIMEOUT returns a value of -1 if SET LOCK_TIMEOUT has not yet been run in the current session.

This example shows the result set when a LOCK_TIMEOUT value is not set.

SELECT @@LOCK_TIMEOUT AS [Lock Timeout];
GO

Here is the result set:

Lock Timeout
------------
-1

This example sets LOCK_TIMEOUT to 1800 milliseconds and then calls @@LOCK_TIMEOUT.

SET LOCK_TIMEOUT 1800;
SELECT @@LOCK_TIMEOUT AS [Lock Timeout];
GO

Here is the result set:

Lock Timeout
------------
1800        

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