Elastic search query for SQL query

Question

I have SQL table XYZ with below data:

P------     S-----     R--  
SAMSUNG     GALAXY     1
SAMSUNG     GALAXY     2
SAMSUNG     GALAXY     10
SAMSUNG     GALAXY     9
APPLE       IOS        12
APPLE       IOS        9

I have below SQL query:

select * from XYZ where P='SAMSUNG' AND S='GALAXY' AND R IN (1,2)

It returns all the records that match column P with value "SAMSUNG" AND column S with "GALAXY" AND column R with values 1 or 2.

OUTPUT:

SAMSUNG     GALAXY     1
SAMSUNG     GALAXY     2

Now I am trying to prepare an Elastic Search query for the above behavior but the result is not as expected:

{'query': 
       {'bool': 
              {'must': [{'match': {'P' : 'SAMSUNG'}}],
               'must': [{'match': {'S' : 'GALAXY'}}],
               'must': [{'match': {'R' : '1'}}, {'match': {'R' : '2'}}]
               }
        }
}

The above query returns empty output. But If I specify only 'P' it works:

{'query': 
       {'bool': 
              {'must': [{'match': {'P' : 'APPLE'}}]}
        }
}

This returns below output

APPLE       IOS        12
APPLE       IOS        9

Not sure what is wrong with my first query. Could any one help how to use "must", "should" with elastic search queries?

Answer 1

You need to use a combination of bool/must queries, to achieve your result

must is equivalent to the logical AND operator and you can use terms query that will act as IN . You need to wrap both the match query and terms query inside the must clause, as in your SQL query all the conditions are combined using AND operator.

---

Adding a working example with index data, search query, and search result

Index Data:

{
  "P": "SAMSUNG",
  "S": "GALAXY",
  "R": 1
}
{
  "P": "SAMSUNG",
  "S": "GALAXY",
  "R": 10
}
{
  "P": "SAMSUNG",
  "S": "GALAXY",
  "R": 2
}
{
  "P": "SAMSUNG",
  "S": "GALAXY",
  "R": 9
}
{
  "P": "APPLE",
  "S": "IOS",
  "R": 12
}
{
  "P": "APPLE",
  "S": "IOS",
  "R": 9
}

Search Query:

{
  "query": {
    "bool": {
      "must": [
        {
          "match": {
            "P": "SAMSUNG"
          }
        },
        {
          "match": {
            "S": "GALAXY"
          }
        },
        {
          "terms": {
            "R": [
              1,
              2
            ]
          }
        }
      ]
    }
  }
}

Search Result:

 "hits": [
      {
        "_index": "67024741",
        "_type": "_doc",
        "_id": "1",
        "_score": 1.8836654,
        "_source": {
          "P": "SAMSUNG",
          "S": "GALAXY",
          "R": 1
        }
      },
      {
        "_index": "67024741",
        "_type": "_doc",
        "_id": "3",
        "_score": 1.8836654,
        "_source": {
          "P": "SAMSUNG",
          "S": "GALAXY",
          "R": 2
        }
      }
    ]