[jira] Commented: (LUCENE-1278) Add optional storing of document numbers in term dictionary

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

    [ https://issues.apache.org/jira/browse/LUCENE-1278?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12594127#action_12594127 ] 

Jason Rutherglen commented on LUCENE-1278:
------------------------------------------

Is there a way to know the number of documents for a term in DocumentsWriter.appendPostings before running through all of them?  Currently a non-optimal linkedlist is used.  Otherwise will implement a growable int array.

> Add optional storing of document numbers in term dictionary
> -----------------------------------------------------------
>
>                 Key: LUCENE-1278
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1278
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: Index
>    Affects Versions: 2.3.1
>            Reporter: Jason Rutherglen
>            Priority: Minor
>         Attachments: lucene.1278.5.4.2008.patch
>
>
> Add optional storing of document numbers in term dictionary.  String index field cache and range filter creation will be faster.  
> Example read code:
> {noformat}
> TermEnum termEnum = indexReader.terms(TermEnum.LOAD_DOCS);
> do {
>   Term term = termEnum.term();
>   if (term == null || term.field() != field) break;
>   int[] docs = termEnum.docs();
> } while (termEnum.next());
> {noformat}
> Example write code:
> {noformat}
> Document document = new Document();
> document.add(new Field("tag", "dog", Field.Store.YES, Field.Index.UN_TOKENIZED, Field.Term.STORE_DOCS));
> indexWriter.addDocument(document);
> {noformat}

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