https://github.com/querqy/querqy

Query preprocessor for Java-based search engines (Querqy Core and Lucene implementation)
https://github.com/querqy/querqy

filter-query java lucene lucene-query querqy querqy-query query-parser rewrite-rules search-engine search-relevance search-synonyms synonyms

Last synced: about 12 hours ago
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Query preprocessor for Java-based search engines (Querqy Core and Lucene implementation)

• Host: GitHub
• URL: https://github.com/querqy/querqy
• Owner: querqy
• License: apache-2.0
• Created: 2014-08-03T21:34:39.000Z (over 11 years ago)
• Default Branch: main
• Last Pushed: 2025-12-15T14:24:11.000Z (28 days ago)
• Last Synced: 2026-01-05T00:15:15.085Z (8 days ago)
• Topics: filter-query, java, lucene, lucene-query, querqy, querqy-query, query-parser, rewrite-rules, search-engine, search-relevance, search-synonyms, synonyms
• Language: Java
• Homepage: https://querqy.org
• Size: 4.1 MB
• Stars: 189
• Watchers: 12
• Forks: 50
• Open Issues: 67
• Metadata Files:
  • Readme: README.md
  • Contributing: contributing.md
  • License: LICENSE

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• awesome-search-relevance - Querqy - Query preprocessing & search rule system for applying query-specific boosts, filters, downboosts, etc (ie downboost 'case' category when user searches for 'iPhone') (Rule Systems / Learning to Rank Training Models)

README

          


[![Build Querqy](https://github.com/querqy/querqy/actions/workflows/ci.yml/badge.svg)](https://github.com/querqy/querqy/actions/workflows/ci.yml)

[![Querqy Core](https://img.shields.io/maven-central/v/org.querqy/querqy-core.svg?label=Querqy%20core%20(Maven%20Central))](https://repo1.maven.org/maven2/org/querqy/querqy-core/)

[![Querqy Lucene](https://img.shields.io/maven-central/v/org.querqy/querqy-lucene.svg?label=Querqy%20Lucene%20(Maven%20Central))](https://repo1.maven.org/maven2/org/querqy/querqy-lucene/)

**IMPORTANT: The Querqy plugin for Solr is no longer maintained in this repository. It has moved to its own repo at https://github.com/querqy/querqy-solr** 

# Querqy

Querqy is a framework for query preprocessing in Java-based search engines.

This is the repository for `querqy-core` and `querqy-lucene`. Repositories 

for further integrations can be found at:

* https://github.com/querqy/querqy-elasticsearch/ (Querqy for Elasticsearch)

* https://github.com/querqy/querqy-opensearch/ (Querqy for OpenSearch)

* https://github.com/querqy/querqy-solr/ (Querqy for Solr)

* https://github.com/querqy/querqy-unplugged/ (Querqy for rewriting queries outside the search engine)

## Documentation and 'Getting started'

[Visit docs.querqy.org/querqy/ for detailed documentation.](https://docs.querqy.org/querqy/index.html) 

**Please make sure you read the [release notes](https://docs.querqy.org/querqy/release-notes.html)!** 

Check out [Querqy.org](https://querqy.org) for related projects that help you speed up search software development.

Developer channel: Join #querqy on the [Relevance & Matching Tech Slack space](https://relevancy.slack.com)

## License

Querqy is licensed under the [Apache License, Version 2](http://www.apache.org/licenses/LICENSE-2.0.html).

## Contributing

Please read our [developer guidelines](contributing.md) before contributing.