I am new to Elastic search and trying to fetch data for one of the attribute whose value(lengh >15)

GET catalog-us/_search
{
  
  "query": {
    "bool": {
      "must": [
        {
          "term": {
            "relation_type": {
              "value": "product"
            }
          }
        },
        {
        "filter" : 
          {
            "script" : {
                "script" : "'product.product_id'.values.length > 12"
              
            }
            }
        }
        
      ]
    }
  }
}

Hi,

Are you still in trouble?
If so, this page may help you to access data in script.