配置文件死锁报告中的“*password------------”是什么意思？

Question

在 SQL Server 2008 R2 中，我收到了几个死锁报告，输入缓冲区中有“*password------------”。看起来像是攻击，但在那种情况下，我不知道攻击的原因或类型。

（日志是由一位经验丰富的 DBA 专家生成的，并告诉我，不是我）

有谁知道它是什么？谢谢！

例子：

<?xml version="1.0"?>
<blocked-process>
  <process id="process879948" taskpriority="0" logused="0" waitresource="KEY: 5:72057602473263104 (1d69201d0ba6)" waittime="5185" ownerId="88389135" transactionname="SELECT" lasttranstarted="2012-09-25T18:11:02.507" XDES="0x1f7d2a590" lockMode="S" schedulerid="2" kpid="4552" status="suspended" spid="86" sbid="2" ecid="0" priority="0" trancount="0" lastbatchstarted="2012-09-25T18:11:02.507" lastbatchcompleted="2012-09-25T18:11:02.507" lastattention="2012-09-25T18:07:35.740" clientapp=".Net SqlClient Data Provider" hostname="IP-xxxxxxxx" hostpid="4868" loginname="sa" isolationlevel="read committed (2)" xactid="88389135" currentdb="1" lockTimeout="4294967295" clientoption1="671088672" clientoption2="128056">
    <executionStack>
      <frame line="14" stmtstart="374" stmtend="764" sqlhandle="0x03000500dac2967f208e4000a19d00000000000000000000"/>
      <frame line="1" stmtstart="44" sqlhandle="0x02000000632f7e131f79ec7312284505961e537a61b81be7"/>
      <frame line="1" sqlhandle="0x000000000000000000000000000000000000000000000000"/>
    </executionStack>
    <inputbuf>

*password---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------   </inputbuf>
  </process>
</blocked-process>

Answer 1

这只是意味着语句的文本包含字符串“password”，而 SQL Server“有用地”将其屏蔽为一项安全功能，以防止您看到其他人的密码。

我能够按如下方式重现这个

CREATE TABLE T(X varchar(1000))

连接 1

BEGIN TRAN

INSERT INTO T VALUES('password1') 

WAITFOR DELAY '00:01:00'

SELECT * FROM T WHERE X = 'password2'

ROLLBACK

连接 2

BEGIN TRAN

INSERT INTO T VALUES('password2') 

WAITFOR DELAY '00:01:00'

SELECT * FROM T WHERE X = 'password1'

ROLLBACK

然后从扩展事件跟踪中检索图形