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Re: Which is less expensive group by or select distin
>>>I had thought about using keys, but I don't think they would
work. So the rest of the requirement is that I have a single file
that includes all the 4,000 topics. I create a summary report of all
the topics first (which I could see using keys for), but then I step
through the content and need to report the details per topic which is
where I couldn't see a way to make use of the keys. So the source
file has this structure:
<topic>
<topic>.....</topic>
<topic>.....</topic>
<topic>.....</topic>
...
</topic>
At 04:53 AM 7/16/2016, Tony Graham tgraham@xxxxxxxxxxxxx wrote:
Another option that you could try to see how it affects memory usage [1]:
<xsl:key name="terms" match="term[empty(@keyref)]" use="true()" />
<data type="topicreport" name="WDTermList">
<xsl:value-of separator=", ">
<xsl:perform-sort select="distinct-values(key('terms', true()))">
<xsl:sort select="." />
</xsl:perform-sort>
</xsl:value-of>
</data>
(borrowing the xsl:perform-sort idea from Martin Honnen, and
assuming that the context node is the document element.)
Regards,
Tony Graham.
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http://www.dvint.com
voice: 619-647-5780
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