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https://issues.apache.org/jira/browse/LUCENE-1278?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12598793#action_12598793
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Jason Rutherglen commented on LUCENE-1278:
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Thought of some simple logic for this that will make it work automatically with
no user interaction and no API additions.
If the term is located in less than or equal to the skipinterval of termdocs
docs, and the term frequency for each doc is 1, then the docs should be stored
in segment.tis. Otherwise they should be stored as usual in segment.frq.
The problem is knowing whether the logic is true in the
DocumentsWriter.appendPostings method.
> 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,
> lucene.1278.5.5.2008.2.patch, lucene.1278.5.5.2008.patch,
> lucene.1278.5.7.2008.patch, lucene.1278.5.7.2008.test.patch,
> TestTermEnumDocs.java
>
>
> 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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