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Update Command Concurrency error - Specific Help

Posted on 2009-04-03
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Last Modified: 2013-12-25
I get a concurrency error when I update my table.  If I ad a new record via "INVENTORY_DRIBindingSource.AddNew()" and then Me.INVENTORY_DRIBindingSource.EndEdit()
        Me.INVENTORY_DRITableAdapter.Update(Me.DIMMSDataSet.INVENTORY_DRI).  All Works fine.  If I open up that specific record & make a change then run:
Me.INVENTORY_DRIBindingSource.EndEdit()
        Me.INVENTORY_DRITableAdapter.Update(Me.DIMMSDataSet.INVENTORY_DRI)
I get the error. Below is my FillByID code...maybe that is the issue.
SELECT     INVENTORY_DRI.PartID, INVENTORY_DRI.PartName, INVENTORY_DRI.PartDescription, INVENTORY_DRI.StockingUnits, INVENTORY_DRI.Location, 
                      SUM(TRX_ROW_DRI.PartsMade - TRX_ROW_DRI.QtyBad) AS PartBalance, INVENTORY_DRI.ID, INVENTORY_DRI.UnitWeight, 
                      INVENTORY_DRI.PartNumber, INVENTORY_DRI.UPC_SKU, INVENTORY_DRI.ItemType, INVENTORY_DRI.ReOrderQty, INVENTORY_DRI.PrefVendor, 
                      INVENTORY_DRI.InActive, INVENTORY_DRI.Offsite, INVENTORY_DRI.OffsiteLocation, INVENTORY_DRI.CostPerUnit, INVENTORY_DRI.DefPurch, 
                      INVENTORY_DRI.Location2
FROM         INVENTORY_DRI LEFT OUTER JOIN
                      TRX_ROW_DRI ON INVENTORY_DRI.PartID = TRX_ROW_DRI.PartID
GROUP BY INVENTORY_DRI.PartID, INVENTORY_DRI.PartName, INVENTORY_DRI.PartDescription, INVENTORY_DRI.StockingUnits, INVENTORY_DRI.Location, 
                      INVENTORY_DRI.ID, INVENTORY_DRI.UnitWeight, INVENTORY_DRI.PartNumber, INVENTORY_DRI.UPC_SKU, INVENTORY_DRI.ItemType, 
                      INVENTORY_DRI.ReOrderQty, INVENTORY_DRI.PrefVendor, INVENTORY_DRI.OffsiteLocation, INVENTORY_DRI.InActive, INVENTORY_DRI.Offsite, 
                      INVENTORY_DRI.CostPerUnit, INVENTORY_DRI.DefPurch, INVENTORY_DRI.Location2
HAVING      (INVENTORY_DRI.ID = @Param1)
 
UPDATE COMMAND:
 
UPDATE    INVENTORY_DRI
SET              PartID = @PartID, PartName = @PartName, PartDescription = @PartDescription, UnitWeight = @UnitWeight, StockingUnits = @StockingUnits, 
                      PartNumber = @PartNumber, UPC_SKU = @UPC_SKU, ItemType = @ItemType, Location = @Location, Location2 = @Location2, 
                      ReOrderQty = @ReOrderQty, PrefVendor = @PrefVendor, InActive = @InActive, Offsite = @Offsite, OffsiteLocation = @OffsiteLocation, 
                      CostPerUnit = @CostPerUnit, DefPurch = @DefPurch, PartBalance = @PartBalance
WHERE     (ID = @Original_ID) AND (PartID = @Original_PartID) AND (@IsNull_PartName = 1 AND PartName IS NULL OR
                      PartName = @Original_PartName) AND (@IsNull_PartDescription = 1 AND PartDescription IS NULL OR
                      PartDescription = @Original_PartDescription) AND (@IsNull_UnitWeight = 1 AND UnitWeight IS NULL OR
                      UnitWeight = @Original_UnitWeight) AND (@IsNull_StockingUnits = 1 AND StockingUnits IS NULL OR
                      StockingUnits = @Original_StockingUnits) AND (@IsNull_PartNumber = 1 AND PartNumber IS NULL OR
                      PartNumber = @Original_PartNumber) AND (@IsNull_UPC_SKU = 1 AND UPC_SKU IS NULL OR
                      UPC_SKU = @Original_UPC_SKU) AND (@IsNull_ItemType = 1 AND ItemType IS NULL OR
                      ItemType = @Original_ItemType) AND (@IsNull_Location = 1 AND Location IS NULL OR
                      Location = @Original_Location) AND (@IsNull_Location2 = 1 AND Location2 IS NULL OR
                      Location2 = @Original_Location2) AND (@IsNull_ReOrderQty = 1 AND ReOrderQty IS NULL OR
                      ReOrderQty = @Original_ReOrderQty) AND (@IsNull_PrefVendor = 1 AND PrefVendor IS NULL OR
                      PrefVendor = @Original_PrefVendor) AND (@IsNull_InActive = 1 AND InActive IS NULL OR
                      InActive = @Original_InActive) AND (@IsNull_Offsite = 1 AND Offsite IS NULL OR
                      Offsite = @Original_Offsite) AND (@IsNull_OffsiteLocation = 1 AND OffsiteLocation IS NULL OR
                      OffsiteLocation = @Original_OffsiteLocation) AND (@IsNull_CostPerUnit = 1 AND CostPerUnit IS NULL OR
                      CostPerUnit = @Original_CostPerUnit) AND (@IsNull_DefPurch = 1 AND DefPurch IS NULL OR
                      DefPurch = @Original_DefPurch) AND (@IsNull_PartBalance = 1 AND PartBalance IS NULL OR
                      PartBalance = @Original_PartBalance)

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Question by:vwalla
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2 Comments
 
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Author Comment

by:vwalla
ID: 24071579
ok.  I removed Optimistic concurrency checking & it works.  Still would like to know exactly why this would happen.
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Accepted Solution

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Raja Jegan R earned 2000 total points
ID: 24075505
Your UPDATE query involves lots of where conditions which will take more time to filter out your required records.
To make the UPDATE query perform faster:
1. You can make the transaction bound for that UPDATE query to be smaller.
2. Appropriate INDEX to reduce the UPDATE queries time.

Above steps will bring down your Concurrency related issues and obviously Deadlocks.
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