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Xpath & conditional filters

• To: xml-dev@l...
• Subject: Xpath & conditional filters
• From: David Higgins <david_higgins@y...>
• Date: Tue, 25 Feb 2003 21:27:38 +0000 (GMT)
• Reply-to: david@h...

Hi ,
 
I have a XPath question hopefully someone can
help me out with.  I want to query a XML document
- sometimes I want to filter by a particular
attribute other times I want to ignore the filter
completely in SQL I would code it something like
this
 
    Select tbl.Field1, tbl.Field2
    From myTable tbl
    Where    
    AND tbl.Field1= ISNULL(@Filter_ID,tbl.Field1)
    AND tbl.Field2=
ISNULL(@Filter_ID2,tbl.Field1)(@Filter_ID2,tbl.Field2)
 
 
I only want to write one xpath query for this the
question is how do I do this when quering my XML
Document in my XSLT stylesheet?


So in if I had a xml doc like below I would
either want to ignore the filter (if it is null) 
or filter on the value of a variable.

<myTable>
            <row Field1="1" Field2="Row 1"/>
            <row Field1="2" Field2="Row 2"/>
            <row Field1="3" Field2="Row 3"/>
</myTable>
 
Thanks

David


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