How to parse XML file in a folder with dynamic t-sql? - sql

Question

I'd like to change this XML to SQL statement below to work with a path rather than a file name, at the moment it's looking for 'C:\Test\XML\PT38.xml'.
I need it to parse any .XML file in the folder rather than look for a specific one. It will be just one file at a time but they'll have different names (number increase: PT39, PT40, etc.).
I tried adding a variable for the path then changing the BULK to look for the variable, but it failed as expected.
I've read something about creating a temporary table then parse the date, but I'm not sure that would work for me.
I'd appreciate the help.
This is what I tried:
DECLARE #xmlFileName varchar(100) = 'C:\Test\XML\'
FROM OPENROWSET(BULK ''' + #xmlFileName + ''', SINGLE_BLOB) AS T(MY_XML)) AS T(MY_XML)
This is the XML content:
<?xml version="1.0" encoding="UTF-8" ?>
<MOD1>
<DC BEGIN="1">
<DC4 SEGMENT="1">
<TABNAM>DC4</TABNAM>
<DOCNUM>0000003899888135</DOCNUM>
</DC4>
<ZPR SEGMENT="1">
<AUFNR>000915229446</AUFNR>
<LNO>RM01PL01</LNO>
<CHARG>0006186588</CHARG>
<STR2>211609</STR2>
<QTY>4166.000</QTY>
<PLN_ORDER>6963701111</PLN_ORDER>
</ZPR>
</DC>
</MOD1>
This is the SQL table:
CREATE TABLE XMLTESTTABLE
(
PON int,
ASP int,
LTN varchar(11),
GAS int,
QY varchar(15),
LNO varchar(2),
StartTime date,
);
This is the statement:
INSERT INTO XMLTESTTABLE(PON, ASP, LTN, GAS, QY, LNO, StartTime)
SELECT ZPRM.value('(AUFNR/text())[1]', 'int')
, ZPRM.value('(CHARG/text())[1]', 'int')
, ZPRM.value('(PLN_ORDER/text())[1]', 'VARCHAR(10)')
, ZPRM.value('(CHARG/text())[1]', 'int')
, ZPRM.value('(QTY/text())[1]', 'DECIMAL(10,0)') AS [qty]
, RIGHT(ZPRM.value('(LNO/text())[1]', 'VARCHAR(10)'), 2) AS [LNO]
, TRY_CAST(STUFF(STUFF(ZPRM.value('(STR2/text())[1]', 'CHAR(6)'),3,0,':'),6,0,':') AS TIME)
FROM (SELECT TRY_CAST(MY_XML AS xml)
FROM OPENROWSET(BULK 'C:\Test\XML\PT38.xml', SINGLE_BLOB) AS T(MY_XML)) AS T(MY_XML)
CROSS APPLY MY_XML.nodes('/MOD1/DC/ZPR') AS MY_XML(ZPRM);

Answer 1

It is much easier to implement in SQL Server 2017 and later. It has much better API to deal with the file system.
Please try the following solution. It will work in SQL Server 2012.
I modified the StartTime column data type as TIME(0).
You would need to modify #folder variable value to match what you have in your environment.
SQL
USE tempdb;
GO
DROP TABLE IF EXISTS dbo.XMLTESTTABLE;
CREATE TABLE dbo.XMLTESTTABLE
(
PON varchar(10),
ASP int,
LTN varchar(11),
GAS int,
QY varchar(15),
LNO varchar(2),
StartTime TIME(0)
);
DECLARE #xml XML
, #sql NVARCHAR(MAX)
, #XMLfileName VARCHAR(256) -- 'e:\Temp\TradeFeed\PT38.xml';
, #folder VARCHAR(256) = 'e:\Temp\TradeFeed';
DECLARE #tbl TABLE (
id INT IDENTITY(1,1) PRIMARY KEY,
[fileName] VARCHAR(512),
depth INT,
isfile BIT
);
INSERT INTO #tbl ([fileName], depth, isfile)
EXEC master.sys.xp_dirtree #folder,1,1;
-- just to see
SELECT * FROM #tbl;
-- filter out not need files
SELECT TOP(1) #XMLfileName = CONCAT(#folder, '\', [fileName])
FROM #tbl
WHERE isfile = 1
AND [fileName] LIKE '%.xml';
SET #sql = N'SELECT #xmlOut = XmlDoc FROM OPENROWSET (BULK ' + QUOTENAME(#XMLfileName,NCHAR(39)) + ', SINGLE_BLOB) AS Tab(XmlDoc)';
EXEC master.sys.sp_executesql #sql, N'#xmlOut XML OUTPUT', #xmlOut = #xml OUTPUT;
INSERT INTO XMLTESTTABLE(PON, ASP, LTN, GAS, QY, LNO, StartTime)
SELECT #xml.value('(/MOD1/DC/DC4/TABNAM/text())[1]', 'VARCHAR(10)')
, c.value('(CHARG/text())[1]', 'int')
, c.value('(PLN_ORDER/text())[1]', 'VARCHAR(10)')
, c.value('(CHARG/text())[1]', 'int')
, c.value('(QTY/text())[1]', 'DECIMAL(10,0)') AS [qty]
, RIGHT(c.value('(LNO/text())[1]', 'VARCHAR(10)'), 2) AS [LNO]
, TRY_CAST(STUFF(STUFF(c.value('(STR2/text())[1]', 'CHAR(6)'),3,0,':'),6,0,':') AS TIME(0))
FROM #xml.nodes('/MOD1/DC/ZPR') AS t(c);
-- test
SELECT * FROM dbo.XMLTESTTABLE;
Output
+-----------+---------+------------+---------+------+-----+-----------+
| PON | ASP | LTN | GAS | QY | LNO | StartTime |
+-----------+---------+------------+---------+------+-----+-----------+
| DC4 | 6186588 | 6963701111 | 6186588 | 4166 | 01 | 21:16:09 |
+-----------+---------+------------+---------+------+-----+-----------+