Search match text in Elasticsearch SpringBoot by using percentage

Issue

I'm a new Elasticsearch SpringBoot here. I don't know how to search match text in Elasticsearch SpringBoot by using percentage. For example, I have a text "Hello world". Can I set a percentage of 50% or 70% to match with my text? I try with property minimumShouldMatch already but it seems doesn't work for my case right now. Anyone help me please, Thank

Solution

You could use should query, split your search phrase by term, and set minimum_should_match according to your pourcentage

Example query

{
  "query": {
    "bool": {
      "should": [
        {
          "term": {
            "my_field": "hello"
          }
        },
        {
          "term": {
            "my_field": "world"
          }
        },
        {
          "term": {
            "my_field": "i'm"
          }
        },
        {
          "term": {
            "my_field": "alive"
          }
        }
      ],
      "minimum_should_match": 2
    }
  }
}

Will find hello world, hello alive etc...

To split a text in terms you should use _analyse of your index

Analyze and split terms

POST myindex/_analyze
{
  "field": "my_field",
  "text": "hello world i'm alive"
}

Which give you result like that to populate your query, and match term analyser with the query, if for example you use custom analyzer

{
  "tokens" : [
    {
      "token" : "hello",
      "start_offset" : 0,
      "end_offset" : 5,
      "type" : "<ALPHANUM>",
      "position" : 0
    },
    {
      "token" : "world",
      "start_offset" : 6,
      "end_offset" : 11,
      "type" : "<ALPHANUM>",
      "position" : 1
    },
    {
      "token" : "i'm",
      "start_offset" : 12,
      "end_offset" : 15,
      "type" : "<ALPHANUM>",
      "position" : 2
    },
    {
      "token" : "alive",
      "start_offset" : 16,
      "end_offset" : 21,
      "type" : "<ALPHANUM>",
      "position" : 3
    }
  ]
}

Answered By - ExploZe