expose lastDocId in the posting from the TermEnum API -----------------------------------------------------
Key: LUCENE-1612 URL: https://issues.apache.org/jira/browse/LUCENE-1612 Project: Lucene - Java Issue Type: Improvement Components: Index Affects Versions: 2.4 Reporter: John Wang We currently have on the TermEnum api: docFreq() which gives the number docs in the posting. It would be good to also have the max docid in the posting. That information is useful when construction a custom DocIdSet, .e.g determine sparseness of the doc list to decide whether or not to use a BitSet. I have written a patch to do this, the problem with it is the TermInfosWriter encodes values in VInt/VLong, there is very little flexibility to add in lastDocId while making the index backward compatible. (If simple int is used for say, docFreq, a bit can be used to flag reading of a new piece of information) output.writeVInt(ti.docFreq); // write doc freq output.writeVLong(ti.freqPointer - lastTi.freqPointer); // write pointers output.writeVLong(ti.proxPointer - lastTi.proxPointer); Anyway, patch is attached with:TestSegmentTermEnum modified to test this. TestBackwardsCompatibility fails due to reasons described above. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online. --------------------------------------------------------------------- To unsubscribe, e-mail: java-dev-unsubscr...@lucene.apache.org For additional commands, e-mail: java-dev-h...@lucene.apache.org