The first statement is clear to me: I know that an IndexReader sees a 'snapshot' of the document set that was taken in the moment of the Reader's creation.
What I don't know is whether this 'snapshot' has also its doc numbers fixed or they may change asynchronously. And another thing I don't know is what are the index operations that may cause the (doc -> doc number) mapping to change. Is it only after delete or there are other ocasions, or I'd better not count on this at all. StJ ----- Original Message ----- From: "Vanlerberghe, Luc" <[EMAIL PROTECTED]> To: "Lucene Users List" <lucene-user@jakarta.apache.org> Sent: Thursday, February 24, 2005 4:07 PM Subject: RE: Custom filters & document numbers > An IndexReader will always see the same set of documents. > Even if another process deletes some documents, adds new ones or > optimizes the complete index, your IndexReader instance will not see > those changes. > > If you detect that the Lucene index changed (e.g. by calling > IndexReader.getCurrentVersion(...) once in a while), you should close > and reopen your 'current' IndexReader and recalculate any data that > relies on the Lucene document numbers. > > Regards, Luc. > > -----Original Message----- > From: Stanislav Jordanov [mailto:[EMAIL PROTECTED] > Sent: donderdag 24 februari 2005 14:18 > To: Lucene Users List > Subject: Custom filters & document numbers > > Given an IndexReader a custom filter is supposed to create a bit set, > that maps each document numbers to {'visible', 'invisible'} On the other > hand, it is stated that Lucene is allowed to change document numbers. > Is it guaranteed that this BitSet's view of document numbers won't > change while the BitSet is still in use (or perhaps the corresponding > IndexReader is still opened) ? > > And another (more low-level) question. > When Lucene may change document numbers? > Is it only when the index is optimized after there has been a delete > operation? > > Regards: StJ > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
