Simulating a union query from SQL in Elasticsearch

union.json

DELETE my_index

PUT my_index
{
  "mappings": {
    "my_type": {
      "properties": {
        "type": {
          "type": "keyword"
        }
      }
    }
  }
}
GET my_index/_mapping

POST my_index/my_type/_bulk
{ "index": { "_id": 1 } }
{ "type": "text" }
{ "index": { "_id": 2 } }
{ "type": "text" }
{ "index": { "_id": 3 } }
{ "type": "text" }
{ "index": { "_id": 4 } }
{ "type": "text" }
{ "index": { "_id": 5 } }
{ "type": "word" }
{ "index": { "_id": 6 } }
{ "type": "word" }
{ "index": { "_id": 7 } }
{ "type": "word" }
{ "index": { "_id": 8 } }
{ "type": "word" }
GET my_index/_search
{ "query": { "match_all": {} } }

GET my_index/_msearch
{}
{ "query": { "term": { "type": "text" }}, "size": 3 }
{}
{ "query": { "term": { "type": "word" }}, "size": 3 }