Title: Apache Lucene™ 5.3.0 available category: core/news URL: save_as:

The Lucene PMC is pleased to announce the release of Apache Lucene 5.3.0

Apache Lucene is a high-performance, full-featured text search engine library written entirely in Java. It is a technology suitable for nearly any application that requires full-text search, especially cross-platform.

The release is available for immediate download at: https://www.apache.org/dyn/closer.lua/lucene/java/5.3.0

This release contains numerous bug fixes, optimizations, and improvements, some of which are highlighted below. The release is available for immediate download at: https://lucene.apache.org/core/mirrors-core-latest-redir.html

Lucene 5.3.0 Release Highlights:

API Changes

  • PhraseQuery and BooleanQuery are now immutable

New features

  • Added a new org.apache.lucene.search.join.CheckJoinIndex class that can be used to validate that an index has an appropriate structure to run join queries
  • Added a new BlendedTermQuery to blend statistics across several terms
  • New common suggest API that mirrors Lucene's Query/IndexSearcher APIs for Document based suggester.
  • IndexWriter can now be initialized from an already open near-real-time or non-NRT reader
  • Add experimental range tree doc values format and queries, based on a 1D version of the spatial BKD tree, for a faster and smaller alternative to postings-based numeric and binary term filtering. Range trees can also handle values larger than 64 bits.

Geo-related features and improvements

  • Added GeoPointField, GeoPointInBBoxQuery, GeoPointInPolygonQuery for simple “indexed lat/lon point in bbox/shape” searching
  • Added experimental BKD geospatial tree doc values format and queries, for fast “bbox/polygon contains lat/lon points”
  • Use doc values to post-filter GeoPointField hits that fall in boundary cells, resulting in smaller index, faster searches and less heap used for each query

Optimizations

  • Reduce RAM usage of FieldInfos, and speed up lookup by number, by using an array instead of TreeMap except in very sparse cases
  • Faster intersection of the terms dictionary with very finite automata, which can be generated eg. by simple regexp queries
  • Various bugfixes and optimizations since the 5.2.0 release.

See the CHANGES.txt file included with the release for a full list of changes and further details.