[jira] Closed: (LUCENE-1292) Tag Index

["Jason Rutherglen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-1292?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jason Rutherglen closed LUCENE-1292.
------------------------------------

    Resolution: Won't Fix

Won't be working on these and they're old

> Tag Index
> ---------
>
>                 Key: LUCENE-1292
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1292
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: Index
>    Affects Versions: 2.3.1
>            Reporter: Jason Rutherglen
>         Attachments: lucene-1292.patch
>
>
> The problem the tag index solves is slow field cache loading and range queries, and reindexing an entire document to update fields that are not tokenized.  
> The tag index holds untokenized terms with a docfreq of 1 in a term dictionary like index file.  The file also stores the docs per term, similar to LUCENE-1278.  The index also has a transaction log and in memory index for realtime updates to the tags.  The transaction log is periodically merged into the existing tag term dictionary index file.
> The TagIndexReader extends IndexReader and is unified with a regular index by ParallelReader.  There is a doc id to terms skip pointer file for the IndexReader.document method.  This file contains a pointer for looking up the terms for a document.  
> There is a higher level class that encapsulates writing a document with tag fields to IndexWriter and TagIndexWriter.  This requires a hook into IndexWriter to coordinate doc ids and flushing segments to disk.  
> The writer class could be as simple as:
> {code}
> public class TagIndexWriter {
>   
>   public void add(Term term, DocIdSetIterator iterator) {
>   }
>   
>   public void delete(Term term, DocIdSetIterator iterator) {
>   }
> }
> {code}

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