elasticsearchHow do I use an elasticsearch query filter?
An Elasticsearch query filter is used to filter the search results of a query using a specific criteria. This can be done by adding a filter clause to the query.
For example, to filter a query for documents with a field name
equal to John
:
GET /_search
{
"query": {
"bool": {
"filter": {
"term": {
"name": "John"
}
}
}
}
}
This query will return documents that match the filter criteria, in this case documents with the field name
equal to John
.
The filter clause can also be used to filter on multiple criteria. For example, to filter documents with a field name
equal to John
and a field age
greater than 30
:
GET /_search
{
"query": {
"bool": {
"filter": [
{
"term": {
"name": "John"
}
},
{
"range": {
"age": {
"gt": 30
}
}
}
]
}
}
}
This query will return documents that match both filter criteria, in this case documents with the field name
equal to John
and the field age
greater than 30
.
The filter clause can also be used to filter on multiple criteria using logical operators. For example, to filter documents with a field name
equal to John
or a field age
greater than 30
:
GET /_search
{
"query": {
"bool": {
"filter": [
{
"term": {
"name": "John"
}
},
{
"range": {
"age": {
"gt": 30
}
}
}
],
"should": [
{
"term": {
"name": "John"
}
},
{
"range": {
"age": {
"gt": 30
}
}
}
]
}
}
}
This query will return documents that match either filter criteria, in this case documents with the field name
equal to John
or the field age
greater than 30
.
Helpful links
More of Elasticsearch
- How can I use elasticsearch zone awareness to improve my software development?
- How can I use Elasticsearch and ZFS together?
- How do I set up an Elasticsearch Yum repository?
- How can I use Elasticsearch and Zookeeper together to manage distributed applications?
- How can I use Elasticsearch and Zabbix together for software development?
- How do I use an elasticsearch query builder?
- How can I check the status of a yellow index in Elasticsearch?
- How can I use Elasticsearch with Zammad?
- How can I use Elasticsearch to diagnose "yellow" issues?
- How can I set up and use Elasticsearch on the Yandex Cloud platform?
See more codes...