How to use openXML() for Complex XMLs in SQL Server 2005 - sql-server-2005

Question

I have the following complex XML
<Collection>
<VOUCHER>
<DATE TYPE="Date">20110401</DATE>
<NARRATION TYPE="String">MUNNA CONVENT ROAD</NARRATION>
<VOUCHERTYPENAME>RETAIL</VOUCHERTYPENAME>
<VOUCHERNUMBER>R-2-I2-9-6-27751</VOUCHERNUMBER>
<ALLLEDGERENTRIES.LIST>
<LEDGERNAME>U.S.T. CANTEEN</LEDGERNAME>
<AMOUNT>-2678.9985</AMOUNT>
</ALLLEDGERENTRIES.LIST>
<ALLLEDGERENTRIES.LIST>
<LEDGERNAME>U.S.T. CANTEEN</LEDGERNAME>
<AMOUNT>-2678.9985</AMOUNT>
</ALLLEDGERENTRIES.LIST>
</VOUCHER>
<VOUCHER>
<DATE TYPE="Date">20110401</DATE>
<NARRATION TYPE="String">MUNNA CONVENT ROAD</NARRATION>
<VOUCHERTYPENAME>RETAIL</VOUCHERTYPENAME>
<VOUCHERNUMBER>R-2-I2-9-6-27751</VOUCHERNUMBER>
<ALLLEDGERENTRIES.LIST>
<LEDGERNAME>U.S.T. CANTEEN</LEDGERNAME>
<AMOUNT>-2678.9985</AMOUNT>
</ALLLEDGERENTRIES.LIST>
<ALLLEDGERENTRIES.LIST>
<LEDGERNAME>U.S.T. CANTEEN</LEDGERNAME>
<AMOUNT>-2678.9985</AMOUNT>
</ALLLEDGERENTRIES.LIST>
</VOUCHER>
</Collection>
I'm saving voucher details in 1 table, ALLLEDGERENTRIES.LIST details in another table.
Both tables have relation on VoucherID. For a particular VoucherID the related x3 values should be stored. In my stored procedure I'm using openxml().
Piece of my SP:
INSERT INTO SalesVoucher(AbsID,VoucherNumber,VoucherTypeName,Narration,VoucherDate)
SELECT #AID,VOUCHERNUMBER,VOUCHERTYPENAME,NARRATION,CAST(DATE AS DATETIME)
FROM OPENXML(#XMLHandle,'ENVELOPE/BODY/DATA/COLLECTION/VOUCHER',3)
WITH (
VOUCHERNUMBER nVarchar(200),VOUCHERTYPENAME varchar(100),NARRATION varchar(500),DATE DATETIME
)
SELECT #VID=##IDENTITY
INSERT INTO SalesLedger(VoucherID,LedgerName,Amount)
SELECT #VID,LEDGERNAME,AMOUNT
FROM OPENXML(#XMLHandle,'ENVELOPE/BODY/DATA/COLLECTION/VOUCHER/ALLLEDGERENTRIES.LIST',3)
WITH(
LEDGERNAME varchar(200),AMOUNT decimal(18,0)
)
All values are storing in DB but the column VoucherID in SalesLedger table is same for all the rows (it should not..) as I used ##IDENTITY it is returning last identity value only.
Please someone help me how to store related voucherID in SalesLedger table using openxml() in sql...

Answer 1

I would probably use the native XQuery capabilities of SQL Server to do this. First, grab the items you need for your SalesVoucher table and insert those.
When you come to insert the details, your "parent" info is already stored in the SalesVoucher table - so go grab the necessary info from there.
Your code would be something like this (assuming your XML data is in a SQL variable called #input of type XML):
-- Insert the "parent" info into SalesVoucher
INSERT INTO dbo.SalesVoucher(VoucherNumber, VoucherTypeName, Narration, VoucherDate)
SELECT
v.value('(VOUCHERNUMBER)[1]', 'NVARCHAR(200)'),
v.value('(VOUCHERTYPENAME)[1]', 'VARCHAR(100)'),
v.value('(NARRATION)[1]', 'VARCHAR(500)'),
v.value('(DATE)[1]', 'DATETIME')
FROM
#input.nodes('/Collection/VOUCHER') AS Coll(V)
This inserts the basic info in your SalesVoucher table.
When you want to parse the details, you need to make a reference back to the VoucherNumber of the parent - with that info, you can retrieve the AbsID from SalesVoucher and insert the appropriate value into SalesLedger:
INSERT INTO #SalesLedger (VoucherID, LedgerName, Amount)
SELECT
sv.AbsID,
AL.LS.value('(LEDGERNAME)[1]', 'VARCHAR(200)'),
AL.LS.value('(AMOUNT)[1]', 'DECIMAL(18,4)')
FROM
#input.nodes('/Collection/VOUCHER') AS Coll(V)
INNER JOIN
dbo.SalesVoucher sv
ON sv.VoucherNumber = v.value('(VOUCHERNUMBER)[1]', 'NVARCHAR(200)')
CROSS APPLY
Coll.V.nodes('.//ALLLEDGERENTRIES.LIST') AS AL(LS)
The CROSS APPLY gets the details for that one particular node, and thus "connects" the details to the "parent" info for the VoucherNumber in the XML above.
As as PS: a datatype of DECIMAL(18,0) is not suitable for values like -2678.9985. DECIMAL(18,0) will store a maximum of 18 digits, but 0 of which after the decimal point - so this value would be stored as -2679. I've changed this to a more useful datatype of DECIMAL(18,4) - 18 digits max, 4 of which after the decimal point.