Passing filename as variable in OPENROWSET(BULK filename)
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Hi everyone,
I am writing a stored procedure that updates a field in a SQL table with a value obtained from a XML file. The update works fine; however I'm using the OPENROWSET(BULK filename) to read the contents into a XML variable.
Is it possible to pass the filename to OPENROWSET via a stored procedure variable? Code follows:
CREATE PROCEDURE procedure_name(@XML_FILE NVARCHAR(100))AS-- Setup XML variableDECLARE @xml XML-- Read the XML file into the XML variable. It will be read into a long text string.DECLARE @XML_FILE_NAME NVARCHAR(100)SET @XML_FILE_NAME = @XML_FILESELECT @xml = BulkColumnFROM OPENROWSET(BULK @XML_FILE_NAME, SINGLE_BLOB) ROW_SETThis code generates error "Incorrect syntax near '@XML_FILE_NAME'." It works if I hard-code the file name, but I'd prefer not do to this, because this functionality will have to be re-used, and I'd prefer not to have to create a new stored procedure for each process. But if I have to, I have to.
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As you’ve just found out, openrowset function doesn’t accept variables as a parameter. This behavior is documented in BOL (Books on line). You could modify your code to work with dynamic SQL (but remember that this approach has some security problems)
Adi
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Hi Adi,
You confirmed what I thought. I even managed to find the bit in BOL that explains the behaviour. I had looked, but I missed that part.
Anyways, here is my inline code that does what I need it to do, in case anyone ever needs to do something similar:
CREATE PROCEDURE procedure_name(@XML_FILE NVARCHAR(MAX))AS-- Setup XML variable to be used to hold contents of XML file.DECLARE @xml XML/* Read the XML file into the XML variable. This is done via a bulk insert using the OPENROWSET()function. Because this stored proc is to be re-used with different XML files, ideally you want to passthe XML file path as a variable. However, because the OPENROWSET() function won't acceptvariables as a parameter, the command needs to be built as a string and then passed to thesp_executesql system stored procedure. The results are then passed back by an output variable.*/-- The command lineDECLARE @COMMAND NVARCHAR(MAX)-- The definition of the parameters used within the command lineDECLARE @PARAM_DEF NVARCHAR(500)-- The parameter used to pass the file name into the commandDECLARE @FILEVAR NVARCHAR(MAX)-- The output variable that holds the results of the OPENROWSET()DECLARE @XML_OUT XMLSET @FILEVAR = @XML_FILESET @PARAM_DEF = N'@XML_FILE NVARCHAR(MAX), @XML_OUT XML OUTPUT'SET @COMMAND = N'SELECT @XML_OUT = BulkColumn FROM OPENROWSET(BULK ''' + @XML_FILE + ''', SINGLE_BLOB) ROW_SET';EXEC sp_executesql @COMMAND, @PARAM_DEF, @XML_FILE = @FILEVAR,@XML_OUT = @xml OUTPUT;--SELECT @xml -
Thanks Christine, very helpful
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Hi - I'm a newby to Stored Procedures and trying to tackle this problem..... :ermm:
I have a stored procedure that functions fine with a hard coded filename.
I am struggling implementing the suggested solution (posted above) for my particular procedure. I want to pass a file name to the procedure via the @pfile_name parameter
I wondered if anyone could help/point me in the right direction.
The SQL I am executing is as follows:
INSERT INTO Transactions (authAmountString, tel, countryMatch, M_course, rawAuthCode, callbackPW, M_seed, amountString, transStatus, authCost, amount, installation, countryString, testMode, M_invoice_no, M_total, fax, rawAuthMessage, M_paymentType, AVS, authAmount, postcode, cost, cardType, authCurrency, country, M_transDate, email, msgType, authMode, M_postback, M_telephone, [_SP.charEnc], M_inv_amount, desc1, M_reason, cartId, lang, currency, M_name, M_apar_id, name1, transTime, ipAddress, instId, compName, charenc, address1, authentication1, transId, M_email)
SELECT
X.payment.query('authAmountString').value('.', 'nvarchar(50)'),
X.payment.query('tel').value('.', 'nvarchar(50)'),
X.payment.query('countryMatch').value('.', 'nvarchar(10)'),
X.payment.query('M_course').value('.', 'nvarchar(50)'),
X.payment.query('rawAuthCode').value('.', 'nvarchar(50)'),
X.payment.query('callbackPW').value('.', 'nvarchar(50)'),
X.payment.query('M_seed').value('.', 'nvarchar(50)'),
X.payment.query('amountString').value('.', 'nvarchar(50)'),
X.payment.query('transStatus').value('.', 'nvarchar(50)'),
X.payment.query('authCost').value('.', 'decimal(18, 2)'),
X.payment.query('amount').value('.', 'decimal(18, 2)'),
X.payment.query('installation').value('.', 'nvarchar(50)'),
X.payment.query('countryString').value('.', 'nvarchar(50)'),
X.payment.query('testMode').value('.', 'nvarchar(50)'),
X.payment.query('M_invoice_no').value('.', 'nvarchar(50)'),
X.payment.query('M_total').value('.', 'decimal(18, 2)'),
X.payment.query('fax').value('.', 'nvarchar(50)'),
X.payment.query('rawAuthMessage').value('.', 'nvarchar(50)'),
X.payment.query('M_paymentType').value('.', 'nvarchar(50)'),
X.payment.query('AVS').value('.', 'nvarchar(50)'),
X.payment.query('authAmount').value('.', 'decimal(18, 2)'),
X.payment.query('postcode').value('.', 'nvarchar(50)'),
X.payment.query('cost').value('.', 'decimal(18, 2)'),
X.payment.query('cardType').value('.', 'nvarchar(50)'),
X.payment.query('authCurrency').value('.', 'nvarchar(50)'),
X.payment.query('country').value('.', 'nvarchar(50)'),
X.payment.query('M_transDate').value('.', 'datetime'),
X.payment.query('email').value('.', 'nvarchar(100)'),
X.payment.query('msgType').value('.', 'nvarchar(50)'),
X.payment.query('authMode').value('.', 'nvarchar(50)'),
X.payment.query('M_postback').value('.', 'nvarchar(50)'),
X.payment.query('M_telephone').value('.', 'nvarchar(50)'),
'UTF-8',
X.payment.query('M_inv_amount').value('.', 'decimal(18, 2)'),
X.payment.query('desc').value('.', 'nvarchar(100)'),
X.payment.query('M_reason').value('.', 'nvarchar(50)'),
X.payment.query('cartId').value('.', 'nvarchar(50)'),
X.payment.query('lang').value('.', 'nvarchar(50)'),
X.payment.query('currency').value('.', 'nvarchar(50)'),
X.payment.query('M_name').value('.', 'nvarchar(50)'),
X.payment.query('M_apar_id').value('.', 'nvarchar(50)'),
X.payment.query('name').value('.', 'nvarchar(50)'),
X.payment.query('transTime').value('.', 'bigint'),
X.payment.query('ipAddress').value('.', 'nvarchar(50)'),
X.payment.query('instId').value('.', 'nvarchar(50)'),
X.payment.query('compName').value('.', 'nvarchar(50)'),
X.payment.query('charenc').value('.', 'nvarchar(50)'),
X.payment.query('address').value('.', 'nvarchar(100)'),
X.payment.query('authentication').value('.', 'nvarchar(50)'),
X.payment.query('transId').value('.', 'bigint'),
X.payment.query('M_email').value('.', 'nvarchar(100)')
FROM (SELECT CAST(x AS XML)
FROM OPENROWSET(BULK @pfile_name, SINGLE_BLOB) AS T(x)) AS T(x)
CROSS APPLY x.nodes('payment') AS X(payment)
Many thanks,
Jim.
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Perfect solution by cristina! Many thanks!
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