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POXml query with cross join on large dataset. how to increase performance
 

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  1. POXml query with cross join on large dataset. how to increase performance
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    <p>I have the following query which takes about 50 seconds for 100 records, however using a count i have determined that the results set will be 100 000 items (this is for a report) so i am looking for ways to increase performance.</p> <pre><code>SELECT TOP 200 OL.*, LI.LineItem.value('Field[@name="storename"][1]/@value', 'varchar(MAX)') AS storename, LI.LineItem.value('Field[@name="pwnumber"][1]/@value', 'varchar(MAX)') AS pwnumber, LI.LineItem.value('Field[@name="department"][1]/@value', 'varchar(MAX)') AS department, LI.LineItem.value('Field[@name="item"][1]/@value', 'varchar(MAX)') AS item, LI.LineItem.value('Field[@name="barcode"][1]/@value', 'varchar(MAX)')AS barcode, LI.LineItem.value('Field[@name="oldprice"][1]/@value', 'varchar(MAX)')AS oldprice, LI.LineItem.value('Field[@name="newprice"][1]/@value', 'varchar(MAX)')AS newprice, LI.LineItem.value('Field[@name="goodsgroup"][1]/@value', 'varchar(MAX)')AS goodsgroup, LI.LineItem.value('Field[@name="startdate"][1]/@value', 'varchar(MAX)')AS startdate, LI.LineItem.value('Field[@name="prodgroup"][1]/@value', 'varchar(MAX)')AS prodgroup, LI.LineItem.value('Field[@name="season"][1]/@value', 'varchar(MAX)')AS season, LI.LineItem.value('Field[@name="pkquantity"][1]/@value', 'varchar(MAX)')AS pkquantity, LI.LineItem.value('Field[@name="recordtype"][1]/@value', 'varchar(MAX)')AS recordtype FROM [lines] OL LEFT JOIN [Clineextension] OLE ON OL.OrderLineId = OLE.OrderLineId CROSS APPLY OLE.LineItems.nodes('/LineItems/LineItem') as LI(LineItem) WHERE Customer = 1302 AND StatusId &gt; 1 </code></pre> <p>i think that especially the select statements can be improved but i am not sure how.</p> <p>any ideas? any help is greatly appreciated.</p> <p>other info sql server 2005 all rights xml field vary per customer</p>
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    1. USPatrick
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    1. CODo the XML columns have [XML indexes](http://msdn.microsoft.com/en-us/library/bb934097(v=SQL.100).aspx) on them? If they don't take a look at the MSDN article [XML Indexes in SQL Server 2005](http://msdn.microsoft.com/en-us/library/ms345121(v=SQL.90).aspx)
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      1. POXml query with cross join on large dataset. how to increase performance
      1. USConrad Frix
 

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