Hi all.
If I want to find the lowest term in a field, I can do something like this:
public Date computeEarliestDate(IndexReader reader) throws IOException {
TermEnum terms = reader.terms(new Term("date", "00000000"));
if (terms.term() == null || !"date".equals(terms.term().field()))
{
return new Date(); // some date before all data
}
return dateFormat.parse(terms.term().text());
}
But what if I want to find the highest? TermEnum can't step backwards.
I am working under these constraints:
* It can't involve iterating every value in the TermEnum because
the number of documents is too large for that to be efficient.
* It has to work with existing text indexes, so I can't cheat by
having another field which sorts in the other direction.
Is my best option to do a sort of binary search by getting the
TermEnum for different terms until I find a term where there are terms
higher than the term but no terms higher than the term for the next
day?
Daniel
--
Daniel Noll Forensic and eDiscovery Software
Senior Developer The world's most advanced
Nuix email data analysis
http://nuix.com/ and eDiscovery software
---------------------------------------------------------------------
To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org
For additional commands, e-mail: java-user-h...@lucene.apache.org
