[Recipes] Multi Index Search and Aggregations in Elasticsearch


Do multi-index search and aggregations in Elasticsearch. 

Solution Summary: 

We can use the same syntax for regular search and aggregations, but by supplying more than one index seperated by commas.


Need to have a working Elasticsearch cluster with Kibana.

Create two documents in two indexes:

PUT /employee/_doc/1?pretty
  "name": "Heartin",
  "role": "Dev"

PUT /student/_doc/1?pretty
  "name": "Heartin",
  "role": "Student"

Solution Steps: 

Multi-index search with request URI

GET /employee,student/_search?q=name:Heartin

Note: Result will have both the records.


Multi-Index Search with request body

GET /employee,student/_search
  "query": { 
    "match": { "name": "Heartin" } 

Note: Result will have both the records (same as with request uri)


Multi-Index Aggregation (Value Count)

POST /employee,student/_search?size=0
    "aggs" : {
        "count_agg" : { 
          "value_count" : { 
            "field" : "_id" 

Note: Value count of 2 will be  returned.


Also read about Joining queries in Elasticsearch.

Recipe Tags: 

Learn Serverless from Serverless Programming Cookbook


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CloudMaterials is my blog to share notes and learning materials on Cloud and Data Analytics. My current focus is on Microsoft Azure and Amazon Web Services (AWS).

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