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ElasticSearch Cookbook

ElasticSearch Cookbook

By : Alberto Paro
4.1 (7)
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ElasticSearch Cookbook

ElasticSearch Cookbook

4.1 (7)
By: Alberto Paro

Overview of this book

ElasticSearch is one of the most promising NoSQL technologies available and is built to provide a scalable search solution with built-in support for near real-time search and multi-tenancy. This practical guide is a complete reference for using ElasticSearch and covers 360 degrees of the ElasticSearch ecosystem. We will get started by showing you how to choose the correct transport layer, communicate with the server, and create custom internal actions for boosting tailored needs. Starting with the basics of the ElasticSearch architecture and how to efficiently index, search, and execute analytics on it, you will learn how to extend ElasticSearch by scripting and monitoring its behaviour. Step-by-step, this book will help you to improve your ability to manage data in indexing with more tailored mappings, along with searching and executing analytics with facets. The topics explored in the book also cover how to integrate ElasticSearch with Python and Java applications. This comprehensive guide will allow you to master storing, searching, and analyzing data with ElasticSearch.
Table of Contents (14 chapters)
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13
Index

Using a Boolean query/filter


Every person using a search engine must have sometimes used the syntax with minus (-) and plus (+) to include or exclude some query terms. The Boolean query/filter allows programmatically defining some queries to include or exclude or optionally include (should) in the query.

This kind of query/filter is one of the most important ones, because it allows to aggregate a lot of simple queries/filters that we will see in this chapter to build a big complex one.

Getting ready

You need a working ElasticSearch cluster and an index populated with the script available in online code.

How to do it...

For executing a Boolean query/filter, we need to perform the following steps:

  1. We execute a Boolean query, from command line as follows:

    curl -XPOST 'http://127.0.0.1:9200/test-index/test-type/_search' -d '{
        "query": {
            "bool" : {
            "must" : {
                "term" : { "parsedtext" : "joe" }
            },
            "must_not" : {
                "range" : {
                    "position...
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