Range query with elasticsearch for string

Question

I am trying use range query with elasticsearch

{
    \"query\": {
        \"range\": {
             \"order_no\": {
                 \"gte\": \"VM-0001\",
               


        

Answer 1

As per the documentation, in case of string fields, Elasticsearch uses a TermRangeQuery which as far as I know doesn't analyze the term to search for. This means that your range VM-0001 - VM-0005 searches for exact these terms. Whereas you have in your index something like vm-0001 (lowercase). So, either use:

{
  "query": {
    "range": {
      "order_no": {
        "gte": "vm-0001",
        "lte": "vm-0005"
      }
    }
  }
}

or add another field in your index where you keep the order_no as keyword without any lowercasing or nGram-atization.