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我一直在阅读 MSDN 关于TRY...CATCH和XACT_STATE。

它有以下示例，用于XACT_STATE在构造CATCH块中TRY…CATCH确定是提交还是回滚事务：

USE AdventureWorks2012;
GO

-- SET XACT_ABORT ON will render the transaction uncommittable
-- when the constraint violation occurs.
SET XACT_ABORT ON;

BEGIN TRY
    BEGIN TRANSACTION;
        -- A FOREIGN KEY constraint exists on this table. This 
        -- statement will generate a constraint violation error.
        DELETE FROM Production.Product
            WHERE ProductID = 980;

    -- If the delete operation succeeds, commit the transaction. The CATCH
    -- block will not execute. …