Elasticsearch search query for matching keyword

To develop an Elasticsearch query for keyword type matching, you can use the "match" query with the "keyword" type field. The "keyword" type fields are not analyzed, which means they are treated as exact values and not tokenized.

Here's an example of how to use the "match" query for keyword type matching:

Suppose you have an index called "my_index" with documents containing a field called "title" of "keyword" type. The goal is to search for documents that have a specific "title" value.

POST /my_index/_search
{
  "query": {
    "match": {
      "title": "Your Keyword Here"
    }
  }
}

In this example, replace "Your Keyword Here" with the actual keyword you want to match. Elasticsearch will find all documents in "my_index" that have an exact match for the "title" field with the specified keyword.

Please note that by default, the "match" query uses the "OR" operator, meaning it will match documents containing any of the provided terms. If you want to perform an exact match on the entire field value, you can use the "operator" parameter:

POST /my_index/_search
{
  "query": {
    "match": {
      "title": {
        "query": "Your Keyword Here",
        "operator": "and"
      }
    }
  }
}

With the "operator" set to "and," Elasticsearch will only return documents that have an exact match with the entire "title" field value, rather than matching any individual term in the "title" field.

Remember to adjust the index name ("my_index") and field name ("title") in the queries based on your actual data model.