使用局部变量设置 NOCOUNT 状态

Question

我正在尝试存储 NOCOUNT 状态，以便在我的程序结束时将其恢复为原始状态，但它所做的只是给我一个 Incorrect syntax near 'NOCOUNT'. 错误。

我做错了什么？

IF @@OPTIONS & 512 <> 0     /* check original state of NOCOUNT */
      PRINT N'This user has SET NOCOUNT turned ON.';
  ELSE
      PRINT N'This user has SET NOCOUNT turned OFF.';

DECLARE @NCStat bit
    SET @NCStat = ( @@OPTIONS & 512 )   /* sets @NCStat to original state of NOCOUNT */

SET NOCOUNT ON ;

IF @@OPTIONS & 512 <> 0     /* verify state of NOCOUNT */
      PRINT N'This user has SET NOCOUNT turned ON.';
  ELSE
      PRINT N'This user has SET NOCOUNT turned OFF.';

PRINT N'NCStat = ' + cast(@NCStat as nvarchar) ;        /* verify value of @NCStat */

/* line 23 */  SET NOCOUNT  @NCStat ;       /* return NOCOUNT to original state */

IF @@OPTIONS & 512 <> 0     /* verify state of NOCOUNT */
      PRINT N'This user has SET NOCOUNT turned ON.';
  ELSE
      PRINT N'This user has SET NOCOUNT turned OFF.';
GO

如果第 23 行被注释掉，所有其他行都可以正常工作，但第 23 行给出了上述错误。

Answer 1

您不能使用变量来设置NOCOUNT：

/* line 23 */  SET NOCOUNT  @NCStat ; /* not legal syntax */

我会这样做：

/* line 23 */
if @NCStat = 1
    SET NOCOUNT ON
else
    SET NOCOUNT OFF