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當我直接從SSMS調用存儲過程（MSSQL 2008R2）或從JTDS調用存儲過程時，我會看到不同的行爲。JTDS和事務
首先請看這兩個程序。
CREATE PROCEDURE [Template].[UnguardedTest]
@outparam_StartTransactionCount INT OUTPUT,
@outparam_TransactionCount INT OUTPUT
AS
BEGIN
SET NOCOUNT ON;
SET XACT_ABORT ON;
DECLARE @StartTranCount INT
SELECT @StartTranCount = @@TRANCOUNT
BEGIN TRANSACTION
BEGIN
SELECT @outparam_StartTransactionCount = @StartTranCount
SELECT @outparam_TransactionCount = @@TRANCOUNT
END
COMMIT TRANSACTION
END
二是非常相似的第一，但它不會開始（也沒有提交）交易，除非在進入該@@TRANCOUNT爲0
CREATE PROCEDURE [Template].[GuardedTest]
@outparam_StartTransactionCount INT OUTPUT,
@outparam_TransactionCount INT OUTPUT
AS
BEGIN
SET NOCOUNT ON;
SET XACT_ABORT ON;
DECLARE @StartTranCount INT
-- Record the @@TRANCOUNT at the beginning of this procedure/trigger.
SELECT @StartTranCount = @@TRANCOUNT
IF @StartTranCount = 0
BEGIN TRANSACTION
BEGIN
SELECT @outparam_StartTransactionCount = @StartTranCount
SELECT @outparam_TransactionCount = @@TRANCOUNT
END
IF @StartTranCount = 0
COMMIT TRANSACTION
END
如果我把他們從SSMS，代碼如下
DECLARE @outparam_TransactionCount INT
DECLARE @outparam_StartTransactionCount INT
EXECUTE [Template].[UnguardedTest] @outparam_StartTransactionCount OUTPUT, @outparam_TransactionCount OUTPUT
SELECT 'UNGUARDED_NOT_WRAPPED' AS Description, @outparam_StartTransactionCount AS [StartTranCount], @outparam_TransactionCount AS [TranCount]
BEGIN TRAN
EXECUTE [Template].[UnguardedTest] @outparam_StartTransactionCount OUTPUT, @outparam_TransactionCount OUTPUT
SELECT 'UNGUARDED_WRAPPED' AS Description, @outparam_StartTransactionCount AS [StartTranCount], @outparam_TransactionCount AS [TranCount]
COMMIT TRAN
EXECUTE [Template].[GuardedTest] @outparam_StartTransactionCount OUTPUT, @outparam_TransactionCount OUTPUT
SELECT 'GUARDED_NOT_WRAPPED' AS Description, @outparam_StartTransactionCount AS [StartTranCount], @outparam_TransactionCount AS [TranCount]
BEGIN TRAN
EXECUTE [Template].[GuardedTest] @outparam_StartTransactionCount OUTPUT, @outparam_TransactionCount OUTPUT
SELECT 'GUARDED_WRAPPED' AS Description, @outparam_StartTransactionCount AS [StartTranCount], @outparam_TransactionCount AS [TranCount]
COMMIT TRAN
輸出是我所期望的。
Description StartTranCount TranCount
--------------------- -------------- -----------
UNGUARDED_NOT_WRAPPED 0 1
Description StartTranCount TranCount
----------------- -------------- -----------
UNGUARDED_WRAPPED 1 2
Description StartTranCount TranCount
------------------- -------------- -----------
GUARDED_NOT_WRAPPED 0 1
Description StartTranCount TranCount
--------------- -------------- -----------
GUARDED_WRAPPED 1 1
即將事件調用包裝到事務中的過程導致StartTranCount爲1，否則爲零。
但是，當我通過JTDS/JDBC執行相同的過程時，根據下面的代碼，我看到了奇怪的行爲。
int tc = -1, startTC = -1;
final Connection con2 = DriverManager.getConnection(url);
con2.setAutoCommit(false);
final CallableStatement proc2 = con2.prepareCall("{ call Template.GuardedTest(?,?) }");
proc2.registerOutParameter("@outparam_StartTransactionCount", Types.INTEGER);
proc2.registerOutParameter("@outparam_TransactionCount", Types.INTEGER);
proc2.execute();
startTC = proc2.getInt("@outparam_StartTransactionCount");
tc = proc2.getInt("@outparam_TransactionCount");
log.info("Guarded StartTC: " + startTC + ", TC: " + tc);
proc2.close();
con2.commit();
con2.close();
final Connection con1 = DriverManager.getConnection(url);
con1.setAutoCommit(false);
final CallableStatement proc1 = con1.prepareCall("{ call Template.UnguardedTest(?,?) }");
proc1.registerOutParameter("@outparam_StartTransactionCount", Types.INTEGER);
proc1.registerOutParameter("@outparam_TransactionCount", Types.INTEGER);
proc1.execute();
startTC = proc1.getInt("@outparam_StartTransactionCount");
tc = proc1.getInt("@outparam_TransactionCount");
log.info("Unguarded StartTC: " + startTC + ", TC: " + tc);
proc1.close();
con1.commit();
con1.close();
我看到下面的輸出：
- Guarded StartTC: 0, TC: 2
- Unguarded StartTC: 0, TC: 2
正如我期待看到如上的「包裹」例如相同的值（因爲據我所知，JDBC調用時開始一個新的事務setAutoCommit(false)，我真的很茫然，什麼回事任何有識之士
附加信息：？
如果我切換到微軟的JDBC驅動程序，我得到我期望的結果
MSFT Driver - Guarded StartTC: 1, TC: 1
MSFT Driver - Unguarded StartTC: 1, TC: 2