Scripted Queries
Scripted queries allow you to use scripts to customize how documents are scored or filtered. This is useful for advanced calculations and custom relevance scoring.
Example: Scripted Query
Let’s create a query that boosts products based on a custom formula using a script.
GET /products/_search
{
"query": {
"function_score": {
"query": {
"match": { "description": "wireless headphones" }
},
"functions": [
{
"script_score": {
"script": {
"source": "doc['reviews.rating'].value * doc['popularity'].value"
}
}
}
]
}
}
}
In this example:
- We use a function_score query to modify the relevance score.
- The script_score function applies a script that multiplies the reviews.rating by the popularity field.
Using Query DSL For Complex Search Queries in Elasticsearch
Elasticsearch is a powerful search engine that provides a flexible and powerful query language called Query DSL (Domain Specific Language). Query DSL allows you to write complex search queries to retrieve the most relevant data from your Elasticsearch indices. This article will guide you through the basics and advanced features of Query DSL, with detailed examples and outputs, to help you master complex search queries in Elasticsearch.