How to reference particular fields in the individual indices when searching through alias in elasticsearch?

Question

const elasticsearch = new Client({ node: `http://localhost:9200` })

const response = await elasticsearch.search({
  index: companyIndex,
  body: {
    query:{
      query_string: {
        query: queryText,
        fields: ['name', 'insuredName', 'instigator']
      }
   }
  }
});

Here companyIndex is the alias of the three indices company-events, company-insureds, company-files. This search will only search through the most primary fields across three indices. There fields include:

company index:

• insuredName
• instigator

company insureds index:

• name

company files index:

• name

In the above code, I just made query fields for the three indices. I want to split across three indices.

Answer 1

There is one way of doing this if you have _index field in your document.

{
  "query":{
    "bool":{
      "should": [{
        "terms":{
          "_index":["company_insureds"]
        }},
        {
         "term":{
          "name":"nameValue"
        }
      }
      ]
    }
  }
}

To achieve the things with other fields, you can refer multi-bool clause

If you don't have _index in you index, there is no way of doing this.