SQL Server: Facing problem to parse nested xml element by XQuery - sql-server

Question

My xml has 4 elements called Sheet, Group, Lineitem and BM
1) there could be multiple Sheet elements but sheet elements will not be nested.
2) Group will be child element of sheet element and Group can be nested means a group can have another child group or many nested child group.
3) Lineitem will be child element of Group element and Lineitem will not be nested.
2) BM will be child element of Lineitem element but BM element will not be nested.
i have a nested xml which i try to parse by xquery to insert data into table one by one. i store the nested element as Parent Child relationship in xml.
here is table structure
CREATE TABLE [dbo].[tblCSM_Details](
[CSM_ID] [int] NOT NULL,
[ID] [int] IDENTITY(1,1) NOT NULL,
[ParentID] [int] NULL,
[Type] [varchar](30) NULL,
[DisplayInCSM] [varchar](200) NULL,
[FontName] [varchar](max) NULL,
[FontStyle] [varchar](max) NULL,
[FontSize] [varchar](max) NULL,
[UnderLine] [varchar](max) NULL,
[BGColor] [varchar](max) NULL,
[LineItemID] [int] NULL,
[BMID] [int] NULL,
[ColOrder] [int] NULL
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
Parent-child relation is maintained in table by the fields called ID and ParentID
My full code to parse nested element in xml.
DECLARE #XMLData XML=N'<Nodes>
<Sheet FontName="" FontStyle="" FontSize="" UnderLine="false" BGColor="" NodeText="Model1">
<Group FontName="" FontStyle="" FontSize="" UnderLine="false" BGColor="" NodeText="Consensus Model">
<LineItem FontName="" FontStyle="" FontSize="" UnderLine="false" BGColor="" LineItemID="1225" NodeText="Net Revenue" />
<LineItem FontName="" FontStyle="" FontSize="" UnderLine="false" BGColor="" LineItemID="1226" NodeText="Cost of Revenue">
<BM FontName="" FontStyle="" FontSize="" UnderLine="false" BGColor="" BMID="01" NodeText="As % of Net Revenue" />
<BM FontName="" FontStyle="" FontSize="" UnderLine="false" BGColor="" BMID="02" NodeText="Year over Year Growth" />
</LineItem>
</Group>
<Group FontName="" FontStyle="" FontSize="" UnderLine="false" BGColor="" NodeText="Segment Details">
<LineItem FontName="" FontStyle="" FontSize="" UnderLine="false" BGColor="" LineItemID="1227" NodeText="Cost of Revenue-GAAP" />
<LineItem FontName="" FontStyle="" FontSize="" UnderLine="false" BGColor="" LineItemID="1228" NodeText="Gross Profit" />
</Group>
</Sheet>
<Sheet FontName="" FontStyle="" FontSize="" UnderLine="false" BGColor="" NodeText="Model2">
<Group FontName="" FontStyle="" FontSize="" UnderLine="false" BGColor="" NodeText="Key Financials">
<LineItem FontName="" FontStyle="" FontSize="" UnderLine="false" BGColor="" LineItemID="1235" NodeText="Total Operating Expenses-GAAP" />
<LineItem FontName="" FontStyle="" FontSize="" UnderLine="false" BGColor="" LineItemID="1236" NodeText="EBITDA" />
</Group>
</Sheet>
</Nodes>'
DECLARE #BMID INT,#ColLineItemID INT
DECLARE #SheetID INT,#GroupID INT,#LineItemID INT
DECLARE #SheetOrderID INT,#GroupOrderID INT,#LineItemOrderID INT,#BMOrderID INT
DECLARE #SheetStartIndex INT ,#SheetCount INT = #XMLData.value('count(/Nodes/Sheet)', 'INT');
DECLARE #GroupStartIndex INT ,#GroupCount INT = #XMLData.value('count(/Nodes/Sheet/Group)', 'INT');
DECLARE #LineitemStartIndex INT ,#LineitemCount INT = #XMLData.value('count(/Nodes/Sheet/Group/LineItem)', 'INT');
DECLARE #BMStartIndex INT ,#BMCount INT = #XMLData.value('count(/Nodes/Sheet/Group/LineItem/BM)', 'INT');
SET #SheetStartIndex = 1
SET #GroupStartIndex = 1
SET #LineitemStartIndex = 1
SET #BMStartIndex = 1
SET #SheetOrderID = 1
SET #GroupOrderID = 1
SET #LineItemOrderID = 1
SET #BMOrderID = 1
DECLARE #DisplayInCSM VARCHAR(MAX),
#FontName VARCHAR(MAX),
#FontStyle VARCHAR(MAX),
#FontSize VARCHAR(MAX),
#UnderLine VARCHAR(MAX),
#BGColor VARCHAR(MAX)
SET #DisplayInCSM = ''
SET #FontName = ''
SET #FontStyle = ''
SET #FontSize = ''
SET #UnderLine = ''
SET #BGColor = ''
WHILE #SheetStartIndex <= #SheetCount
BEGIN --Inserting sheet data
--PRINT 'Sheet'
SELECT #DisplayInCSM = tab.col.value('#NodeText[1]', 'VARCHAR(MAX)'),
#FontName = tab.col.value('#FontName[1]', 'VARCHAR(MAX)'),
#FontStyle = tab.col.value('#FontStyle[1]', 'VARCHAR(MAX)'),
#FontSize = tab.col.value('#FontSize[1]', 'VARCHAR(MAX)'),
#UnderLine = tab.col.value('#UnderLine[1]', 'VARCHAR(MAX)'),
#BGColor = tab.col.value('#BGColor[1]', 'VARCHAR(MAX)')
FROM #XMLData.nodes('/Nodes/Sheet[position() = sql:variable("#SheetStartIndex")]') AS tab(col)
INSERT INTO tblCSM_Details(CSM_ID,[ParentID],[Type],[DisplayInCSM],[FontName],[FontStyle],[FontSize],[UnderLine],[BGColor],[LineItemID],[BMID],[ColOrder])
VALUES(1,0,'SHEET',#DisplayInCSM,#FontName,#FontStyle,#FontSize,#UnderLine,#BGColor,0,0,#SheetOrderID)
SELECT #SheetID = SCOPE_IDENTITY()
BEGIN --Inserting Group data
SET #GroupOrderID = 1
SET #GroupStartIndex = 1
WHILE #GroupStartIndex <= #GroupCount
BEGIN --Inserting Group data
SELECT #DisplayInCSM = tab.col.value('#NodeText[1]', 'VARCHAR(MAX)'),
#FontName = tab.col.value('#FontName[1]', 'VARCHAR(MAX)'),
#FontStyle = tab.col.value('#FontStyle[1]', 'VARCHAR(MAX)'),
#FontSize = tab.col.value('#FontSize[1]', 'VARCHAR(MAX)'),
#UnderLine = tab.col.value('#UnderLine[1]', 'VARCHAR(MAX)'),
#BGColor = tab.col.value('#BGColor[1]', 'VARCHAR(MAX)')
FROM #XMLData.nodes('/Nodes/Sheet/Group[position() = sql:variable("#GroupStartIndex")]') AS tab(col)
INSERT INTO tblCSM_Details(CSM_ID,[ParentID],[Type],[DisplayInCSM],[FontName],[FontStyle],[FontSize],[UnderLine],[BGColor],[LineItemID],[BMID],[ColOrder])
VALUES(1,#SheetID,'GROUP',#DisplayInCSM,#FontName,#FontStyle,#FontSize,#UnderLine,#BGColor,0,0,#GroupOrderID)
SELECT #GroupID = SCOPE_IDENTITY()
BEGIN --Inserting LineItem data
SET #LineItemOrderID = 1
SET #LineitemStartIndex = 1
WHILE #LineitemStartIndex <= #LineitemCount
BEGIN
SELECT #DisplayInCSM = tab.col.value('#NodeText[1]', 'VARCHAR(MAX)'),
#FontName = tab.col.value('#FontName[1]', 'VARCHAR(MAX)'),
#FontStyle = tab.col.value('#FontStyle[1]', 'VARCHAR(MAX)'),
#FontSize = tab.col.value('#FontSize[1]', 'VARCHAR(MAX)'),
#UnderLine = tab.col.value('#UnderLine[1]', 'VARCHAR(MAX)'),
#BGColor = tab.col.value('#BGColor[1]', 'VARCHAR(MAX)'),
#ColLineItemID = CAST(tab.col.value('#LineItemID[1]', 'VARCHAR(MAX)') AS INT)
FROM #XMLData.nodes('/Nodes/Sheet/Group/LineItem[position() = sql:variable("#LineitemStartIndex")]') AS tab(col)
INSERT INTO tblCSM_Details(CSM_ID,[ParentID],[Type],[DisplayInCSM],[FontName],[FontStyle],[FontSize],[UnderLine],[BGColor],[LineItemID],[BMID],[ColOrder])
VALUES(1,#GroupID,'LINEITEM',#DisplayInCSM,#FontName,#FontStyle,#FontSize,#UnderLine,#BGColor,#ColLineItemID,0,#LineItemOrderID)
SELECT #LineItemID = SCOPE_IDENTITY()
BEGIN --Inserting BM data
SET #BMOrderID = 1
SET #BMStartIndex = 1
WHILE #BMStartIndex <= #BMCount
BEGIN --Inserting sheet data
SELECT #DisplayInCSM = tab.col.value('#NodeText[1]', 'VARCHAR(MAX)'),
#FontName = tab.col.value('#FontName[1]', 'VARCHAR(MAX)'),
#FontStyle = tab.col.value('#FontStyle[1]', 'VARCHAR(MAX)'),
#FontSize = tab.col.value('#FontSize[1]', 'VARCHAR(MAX)'),
#UnderLine = tab.col.value('#UnderLine[1]', 'VARCHAR(MAX)'),
#BGColor = tab.col.value('#BGColor[1]', 'VARCHAR(MAX)'),
#BMID = CAST(tab.col.value('#BMID[1]', 'VARCHAR(MAX)') AS INT)
FROM #XMLData.nodes('/Nodes/Sheet/Group/LineItem/BM[position() = sql:variable("#BMStartIndex")]') AS tab(col)
INSERT INTO tblCSM_Details(CSM_ID,[ParentID],[Type],[DisplayInCSM],[FontName],[FontStyle],[FontSize],[UnderLine],[BGColor],[LineItemID],[BMID],[ColOrder])
VALUES(1,#LineItemID,'BM',#DisplayInCSM,#FontName,#FontStyle,#FontSize,#UnderLine,#BGColor,0,#BMID,#BMOrderID)
SET #BMOrderID = #BMOrderID + 1
SET #BMStartIndex = #BMStartIndex + 1
END
END
SET #LineItemOrderID = #LineItemOrderID + 1
SET #LineitemStartIndex = #LineitemStartIndex + 1
END
END
SET #GroupOrderID = #GroupOrderID + 1
SET #GroupStartIndex = #GroupStartIndex + 1;
END
END
SET #SheetOrderID = #SheetOrderID + 1
SET #SheetStartIndex = #SheetStartIndex + 1;
END
1) When run the above code then i saw 6 Group has been inserted into table. whereas i have 3 group in xml
2) BM element has been added under wrong lineitem.
i insert data into loop because i have parent child relation in table. so when i insert parent data then i store parent's inserted id into variable which i also insert during child data insertion.
i am not being able to understand where i made the mistake in code. anyone can help me. thanks