使用OpenQuery和参数执行存储过程

Question

Stored procedure as below. It is using a linked server to Oracle.

ALTER PROCEDURE [dbo].[SVOPS_ZsmartPaymentView]
    (@param01 VARCHAR(255))
AS
BEGIN
    SELECT * 
    FROM OPENQUERY(ZSMART_PROD, 'SELECT BANK_SN FROM CC.V_PAYMENT WHERE BANK_SN=''@param01''')
END

If I call the stored procedure with parameters as shown below, the result is empty:

EXEC [dbo].[SVOPS_ZsmartPaymentView] @param01 = 'T131612073600'

But if I run the statement directly like below, there is result.

SELECT * 
FROM openquery(ZSMART_PROD, 'SELECT * FROM CC.V_PAYMENT WHERE BANK_SN=''T131612073600''')

Any idea why it returned empty result if executed using the stored procedure?

Answer 1

Try this:

ALTER PROCEDURE [dbo].[SVOPS_ZsmartPaymentView]
    (@param01 VARCHAR(255))
AS
BEGIN
    SELECT * 
    FROM OPENQUERY(ZSMART_PROD, 'SELECT BANK_SN FROM CC.V_PAYMENT WHERE BANK_SN=''' + @param01 + '''')
END

Answer 2

I follow the sample from https://support.microsoft.com/en-us/help/314520/how-to-pass-a-variable-to-a-linked-server-query .

And it works.

Pass Basic Values

When the basic Transact-SQL statement is known, but you have to pass in one or more specific values, use code that is similar to the following sample:

DECLARE @TSQL varchar(8000), @VAR char(2) SELECT @VAR = 'CA' SELECT @TSQL = 'SELECT * FROM OPENQUERY(MyLinkedServer,''SELECT * FROM pubs.dbo.authors WHERE state = ''''' + @VAR + ''''''')' EXEC (@TSQL)

Thanks.