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[[api]]
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== API Extension Plugins
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API extension plugins add new functionality to Elasticsearch by adding new APIs or features, usually to do with search or mapping.
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[float]
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=== Core API extension plugins
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The core API extension plugins are:
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<<plugins-delete-by-query,Delete by Query>>::
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The delete by query plugin adds support for deleting all of the documents
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(from one or more indices) which match the specified query. It is a
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replacement for the problematic _delete-by-query_ functionality which has been
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removed from Elasticsearch core.
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[float]
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=== Community contributed API extension plugins
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A number of plugins have been contributed by our community:
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* https://github.com/carrot2/elasticsearch-carrot2[carrot2 Plugin]:
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Results clustering with http://project.carrot2.org/[carrot2] (by Dawid Weiss)
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* https://github.com/wikimedia/search-extra[Elasticsearch Trigram Accelerated Regular Expression Filter]:
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(by Wikimedia Foundation/Nik Everett)
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* https://github.com/kzwang/elasticsearch-image[Elasticsearch Image Plugin]:
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Uses https://code.google.com/p/lire/[Lire (Lucene Image Retrieval)] to allow users
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to index images and search for similar images (by Kevin Wang)
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* https://github.com/wikimedia/search-highlighter[Elasticsearch Experimental Highlighter]:
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(by Wikimedia Foundation/Nik Everett)
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* https://github.com/YannBrrd/elasticsearch-entity-resolution[Entity Resolution Plugin]:
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Uses http://github.com/larsga/Duke[Duke] for duplication detection (by Yann Barraud)
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* https://github.com/NLPchina/elasticsearch-sql/[SQL language Plugin]:
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Allows Elasticsearch to be queried with SQL (by nlpcn)
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* https://github.com/codelibs/elasticsearch-taste[Elasticsearch Taste Plugin]:
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Mahout Taste-based Collaborative Filtering implementation (by CodeLibs Project)
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* https://github.com/hadashiA/elasticsearch-flavor[Elasticsearch Flavor Plugin] using
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http://mahout.apache.org/[Mahout] Collaboration filtering (by hadashiA)
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* https://github.com/jurgc11/es-change-feed-plugin[WebSocket Change Feed Plugin] (by ForgeRock/Chris Clifton)
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2015-08-15 12:00:55 -04:00
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include::delete-by-query.asciidoc[]
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