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SQL存储过程递归下的事务处理(本身的缺陷还是蛮大的)

2010-12-13 14:27:52| 分类： SQL | 标签： |举报 |字号大中小订阅

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ALTER proc [dbo].[test]
    @a nvarchar(3)
as
declare @sqlstr nvarchar(4000);
set @sqlstr = '
declare @nestedFlag bit;
if(@@trancount>0)
begin
    set @nestedFlag=1;
    SAVE TRAN a' + @a + ';
    print @nestedFlag;
end
ELSE
BEGIN
    SET @nestedFlag=0;
    BEGIN TRAN b;
    print @nestedFlag;
END
begin try
    if(@a < 15)
    begin
        print @a;
        set @a = @a + 1;
        insert into dbo.testTable (testData1) values (@a);
        exec test @a;
    end
    if(@nestedFlag=0)
    BEGIN
        COMMIT TRAN b;
    END
end try
begin catch
    if(@nestedFlag<>0)
        ROLLBACK TRAN a' + @a + ';
    else
        rollback tran b;
end catch'

exec sp_executesql @sqlstr, N'@a nvarchar(10)', @a;

调用:exec test '1';
结论只执行10次超出就自动rollback了~ 也就是说最多只能开10个记录点递归的上限是32次~

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