Just to clarify. I have a Field 'uid' those value is an unique integer.
I use it as a key to the document stored externally. I don't mean
Lucene's internal document number.
I was wonder if there is a method to query the highest value of a
field, perhaps something like:
IndexReader.maxTerm('uid')
what you could do is to write your own IndexWriter class by extending
the original one found in org.apache.lucene.index.IndexWriter. Than you
have direct access to lucene's segment counter which could provide you a
unique id for each document in the index. Those id's would stay sticky
even if you modify the index after the intial creation process.
is that the hint you need to start ?
regards
Bernhard
What would the purpose of an auto-generated UID be?
But no, Lucene does not generate UID's for you. Documents are
numbered internally by their insertion order. This number changes,
however, when documents are deleted in the middle and the index is
optimized.
Erik
On Nov 22, 2004, at 1:50 PM, aurora wrote:
Is there a way to auto-generate uid in Lucene? Even it is just a way
to query the highest uid and let the application add one to it will
do.
Thanks.
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