Question

我在使用此查询时遇到麻烦...知道如何声明变量并使它对OPENROWSET查询可见吗？

  DECLARE @SERVERNM VARCHAR;

  SET @SERVERNM = (SELECT(CAST(CONNECTIONPROPERTY('local_net_address') AS VARCHAR) + '\' + CAST(SERVERPROPERTY('InstanceName') AS VARCHAR)))

  SELECT 
      * 
  FROM
      OPENROWSET('SQLOLEDB','SERVER=@SERVERNM;Trusted_Connection=yes;',
  'set fmtonly off;exec DW..P750106119 @ENT_NR_VERSAO=1')

错误：

命名管道提供者：无法打开与SQL Server [53]的连接。

Answer 1

这是变量的声明：

DECLARE @SERVERNM VARCHAR(100)

SET @SERVERNM = (SELECT(CAST(CONNECTIONPROPERTY('local_net_address') AS VARCHAR)+'\'+CAST(SERVERPROPERTY('InstanceName') AS VARCHAR)))

Answer 2

您不能在文字字符串中使用变量。在连接中，您要连接到实际称为"@SERVERNM"的服务器，不是 @SERVERNM的值。另外，您拥有DECLARE @SERVERNM VARCHAR，与DECLARE @SERVERNM VARCHAR(1)相同。我怀疑此可能工作正常，但是假定 @SERVERNM的值将小于或等于128个字符：

DECLARE @SERVERNM sysname;
SELECT @SERVERNM = CAST(CONNECTIONPROPERTY('local_net_address') AS sysname)+'\'+CAST(SERVERPROPERTY('InstanceName') AS sysname);
DECLARE @SQL nvarchar(MAX);
SET @SQL = N'SELECT *' + NCHAR(13) + NCHAR(10) +
           N'FROM OPENROWSET(''SQLOLEDB'',' + NCHAR(13) + NCHAR(10) +
           N'                ''SERVER=' + QUOTENAME(@SERVERNM,'"') + N';Trusted_Connection=yes;'',' + NCHAR(13) + NCHAR(10) +
           N'                ''set fmtonly off;exec DW..P750106119 @ENT_NR_VERSAO=1'');'
EXEC sp_executesql @SQL;

Answer 3

解决方案：

DECLARE @SERVERNM sysname;
SET @SERVERNM = 'SERVER='+CAST(CONNECTIONPROPERTY('local_net_address') AS sysname)+'\'+CAST(SERVERPROPERTY('InstanceName') AS sysname)+';Trusted_Connection=yes;'
DECLARE @TEST NVARCHAR(MAX)
SET @TEST = QUOTENAME(@SERVERNM,'''')

DECLARE @SQL nvarchar(MAX);
SET @SQL = N'SELECT *' + NCHAR(13) + NCHAR(10) +
           N'FROM OPENROWSET(''SQLOLEDB'',' + NCHAR(13) + NCHAR(10) +
           N'                ' + @TEST + ',' + NCHAR(13) + NCHAR(10) +
           N'                ''set fmtonly off;exec DW..P750106119 @ENT_NR_VERSAO=1'');'

EXEC sp_executesql @SQL;

SQL Server-使用参数的OPENROWSET服务器名称错误

3 个答案: