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In this video, we discuss about Boolean Query DSL or request body search in Elasticsearch. This is part of Query DSL (Domain Specific Language)
What is boolean query (0:00)
Filter Clause (1:00)
Must Clause (2:19)
Must Not Clause (3:13)
Should Clause (4:30)
Points to Note (5:40)
A nice Example (7:10)
Playlist Link: https://www.youtube.com/watch?v=lnEzmQHa6Co&list=PLa6iDxjj_9qVaf5CsXWP-GAgZoVwKowjx&ab_channel=Codetuber
#coding #elasticSearch #kibana #dataScience #query #dsl #booleanQuery #elasticStack
Elasticsearch is a search engine based on the Lucene library. It provides a distributed, multitenant-capable full-text search engine with an HTTP web interface and schema-free JSON documents.
Match query - A query that matches documents matching boolean combinations of other queries. The bool query maps to Lucene BooleanQuery. It is built using one or more boolean clauses, each clause with a typed occurrence.
filter - The clause (query) must appear in matching documents. However unlike must the score of the query will be ignored. Filter clauses are executed in filter context, meaning that scoring is ignored and clauses are considered for caching. Represents an AND.
must - The clause (query) must appear in matching documents and will contribute to the score.
should - The clause (query) should appear in the matching document, represents an OR.
must_not - The clause (query) must not appear in the matching documents. Clauses are executed in filter context meaning that scoring is ignored and clauses are considered for caching. Because scoring is ignored, a score of 0 for all documents is returned.