Question

SQL Server 2008 R2

这不起作用：

IF @exists = 1 
    SELECT
        @pic = pImage.BulkColumn
    FROM
        OPENROWSET(BULK @fn, SINGLE_BLOB) AS pImage
ELSE
    SET @pic = NULL

除非我将@fn（NVARCHAR）替换为硬编码字符串，例如 N'C：\ path \ to \ some.jpg'。但是必须有一种方法可以在那里使用变量，对吗？

Answer 1

我建议使用Dynamic sql，类似于这个答案：Using a Variable in OPENROWSET Query

在你的情况下它会是这样的：

DECLARE @sql VARCHAR(MAX)
IF @exists = 1 
SET @sql = 'SELECT pImage.BulkColumn FROM OPENROWSET(BULK ''' + @fn + ''', SINGLE_BLOB) AS pImage'

sp_execute @sql
--Here you would need to add something to retreive @pic (I didn't add it since I don't know what @pic is. You can guide you with this link https://msdn.microsoft.com/en-us/library/ms188001.aspx
ELSE 
SET @pic = NULL

OPENROWSET不接受变量？

1 个答案: