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05. Searching – The Basic Tools

05. Searching – The Basic Tools

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05. Searching – The Basic Tools

  1. 1. ElasticSearch Searching – The Basic Tools http://elastic.openthinklabs.com/
  2. 2. Serching – The Basic Tools ● A search can be any of the following: ● A structured query on concrete fields like gender or age, sorted by a field like join_date, similar to the type of query that you could construct in SQL ● A full-text query, which finds all documents matching the search keywords, and returns them sorted by relevance ● A combination of the two ● To use Elasticsearch to its full potential, you need to understand three subjects ● Mapping : How the data in each field is interpreted ● Analysis : How full text is processed to make it searchable ● Query DSL : The flexible, powerful query language used by Elasticsearch
  3. 3. The Empty Search GET /_search Important section ● hits ● took ● shards ● timeout
  4. 4. Multi-index, Multitype ● /_search : Search all types in all indices ● /gb/_search : Search all types in the gb index ● /gb,us/_search : Search all types in the gb and us indices ● /g*,u*/_search : Search all types in any indices beginning with g or beginning with u ● /gb/user/_search : Search type user in the gb index ● /gb,us/user,tweet/_search : Search types user and tweet in the gb and us indices ● /_all/user,tweet/_search : Search types user and tweet in all indices
  5. 5. Pagination ● Elasticsearch accepts the from and size parameters: ● size : Indicates the number of results that should be returned, defaults to 10 ● from : Indicates the number of initial results that should be skipped, defaults to 0 GET /_search?size=5 GET /_search?size=5&from=5 GET /_search?size=5&from=10
  6. 6. Search Lite GET /_all/tweet/_search?q=tweet:elasticsearch GET /_search?q=%2Bname%3Ajohn+%2Btweet%3Amary GET /_search?q=mary +name:john +tweet:mary +name:(mary john) +date:>2014-09-10 +(aggregations geo) ?q=%2Bname%3A(mary+john)+%2Bdate%3A%3E2014-09-10+%2B(aggregations+geo)
  7. 7. Referensi ● ElasticSearch, The Definitive Guide, A Distrib uted Real-Time Search and Analytics Engine, Cl inton Gormely & Zachary Tong, O’Reilly

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