sql-server - IsNumeric 失败并显示 "A severe error occurred on the current command."SQL Server 2014 CTE

Question

我正在运行一系列生成数据库的脚本。它们在 SQL Server 2012 (11.0.5058.0) 上运行完成。在 SQL Server 2014 (12.0.4213.0) 上，脚本错误如下:

Msg 0, Level 11, State 0, Line 0
A severe error occurred on the current command. The results, if any, should be discarded.

Msg 0, Level 20, State 0, Line 0
A severe error occurred on the current command. The results, if any, should be discarded.

看来，在 CTE 查询中使用 IsNumeric 语句的结果会破坏查询构建，因为不需要任何行来导致错误。我遇到的案例的简化版本是:

CREATE TABLE #Temp1 ( CTECol VARCHAR );
CREATE TABLE #Temp2 ( NumCol Int null);
;
WITH cte AS 
(
    SELECT 
        CASE WHEN ISNUMERIC(t.CTECol) = 1 
                THEN 1 
                ELSE null
        END as IsNCol1
    FROM
        #Temp1 t
)
SELECT * 
FROM #Temp2 
JOIN cte ON #Temp2.NumCol = cte.IsNCol1

我能找到的最简单的情况是:

CREATE TABLE #Temp3 ( CTECol Int );
CREATE TABLE #Temp4 ( NumCol Int );
;
WITH cte AS 
(
    SELECT ISNUMERIC(t.CTECol) as IsNCol1
    FROM #Temp3 t
)
SELECT * 
FROM #Temp4 
JOIN cte ON #Temp4.NumCol = cte.IsNCol1

我检查了 Microsoft 的错误级别看起来 11 是可纠正的用户错误，20 是 fatal error ，所以我觉得我收到了一条混合消息。

是否有正确的方法来做到这一点，还是 2014 年的回归？

Answer 1

这肯定是一个错误。

CTE 也不需要产生这种行为。下面直接使用表达式也有同样的效果。

SELECT *
FROM   #Temp4
       JOIN #Temp3
         ON #Temp4.NumCol = ISNUMERIC(#Temp3.CTECol) 

我可以在 12.0.2269.0 和 12.0.4213.0 上重现，但不能在 12.0.4449.0 上重现，所以看起来现在已经修复了。

包含详细信息的相关知识库文章为 ( FIX: Access violation when a query uses ISDATE or ISNUMERIC functions in Join conditions in SQL Server 2014 SP1 )。

引发异常时的堆栈跟踪如下(以便于搜索)

KernelBase.dll!RaiseException()
msvcr100.dll!_CxxThrowException(void * pExceptionObject, const _s__ThrowInfo * pThrowInfo) Line 157
sqldk.dll!ExceptionBackout::GetCurrentException(void)
sqldk.dll!ex_raise2(int,int,int,int,void *,char *)
sqldk.dll!ex_raise_va_list(int,int,int,int,char *)
sqllang.dll!alg_ex_raise(int,int,int,int,int,...)
sqllang.dll!CAlgTableMetadata::RaiseBadTableException(int,int)
sqllang.dll!CAlgTableMetadata::Bind(class CRelOp_Query *,class COptExpr *)
sqllang.dll!CRelOp_Get::BindTree(class COptExpr *,class CBindEnv *,int)
sqllang.dll!COptExpr::BindTree(class CBindEnv *,int)
sqllang.dll!CRelOp_FromList::BindTree(class COptExpr *,class CBindEnv *,int)
sqllang.dll!COptExpr::BindTree(class CBindEnv *,int)
sqllang.dll!CRelOp_QuerySpec::BindTree(class COptExpr *,class CBindEnv *,int)
sqllang.dll!COptExpr::BindTree(class CBindEnv *,int)
sqllang.dll!CRelOp_DerivedTable::BindTree(class COptExpr *,class CBindEnv *,int)
sqllang.dll!COptExpr::BindTree(class CBindEnv *,int)
sqllang.dll!CRelOp_Query::BindCTEList(class CBindEnv *,class COptExpr *)
sqllang.dll!CRelOp_SelectQuery::BindTree(class COptExpr *,class CBindEnv *,int)
sqllang.dll!COptExpr::BindTree(class CBindEnv *,int)
sqllang.dll!CRelOp_Query::FAlgebrizeQuery(class COptExpr *,class CCompExecCtxtStmt const &,enum EObjType,class CSequenceProjectContext *)
sqllang.dll!CProchdr::FNormQuery(class CCompExecCtxtStmt const &,class CAlgStmt *,enum EObjType)
sqllang.dll!CProchdr::FNormalizeStep(class CCompExecCtxtStmt const &,class CAlgStmt *,class CCompPlan *,bool,class CParamExchange *,unsigned long *)
sqllang.dll!CSQLSource::FCompile(class CCompExecCtxt const &,class CParamExchange *)
sqllang.dll!CSQLSource::FCompWrapper(class CCompExecCtxt const &,class CParamExchange *,enum CSQLSource::ESqlFunction)
sqllang.dll!CSQLSource::Transform(class CCompExecCtxt const &,class CParamExchange *,enum CSQLSource::ESqlState)
sqllang.dll!CSQLSource::Execute(class CCompExecCtxtBasic const &,class CParamExchange *,unsigned long)
sqllang.dll!process_request(class IBatch *,class SNI_Conn *,enum RequestType)
sqllang.dll!process_commands(void *)
sqldk.dll!SOS_Task::Param::Execute(class SOS_Task *,void * * const)
sqldk.dll!SOS_Scheduler::RunTask(class Worker *)
sqldk.dll!SOS_Scheduler::ProcessTasks(class SOS_Scheduler *,class Worker *)
sqldk.dll!SchedulerManager::WorkerEntryPoint(class Worker *)
sqldk.dll!SystemThread::RunWorker(class Worker *)
sqldk.dll!SystemThreadDispatcher::ProcessWorker(class SystemThread *)
sqldk.dll!SchedulerManager::ThreadEntryPoint(void *)
kernel32.dll!BaseThreadInitThunk()
ntdll.dll!RtlUserThreadStart()