sql-server - 'THROW' 附近的语法不正确

Question

IF @SQL IS NOT NULL
BEGIN
    BEGIN TRY 
        EXEC sp_executesql @SQL
        PRINT 'SUCCESS: ' + @SQL
    END TRY 
    BEGIN CATCH
        SET @ErrorMessage = 
                    N'Error dropping constraint' + @CRLF
                    + 'Table ' + @TableName + @CRLF
                    + 'Script: ' + @SQL + @CRLF
                    + 'Error message: ' + ERROR_MESSAGE() + @CRLF
        THROW  50100, @ErrorMessage, 1;
    END CATCH
END

当CATCH执行时，我收到以下错误:

Msg 102, Level 15, State 1, Line 257
Incorrect syntax near 'THROW'.

用 PRINT @ErrorMessage 替换 THROW 是可行的。

用文字字符串替换 @ErrorMessage 变量是可行的。

但是，根据文档，THROW 应该能够接受变量。不知道该怎么做。

Answer 1

来自MSDN :

The statement before the THROW statement must be followed by the semicolon (;) statement terminator.