Keyword type to lowercase

Normalizer for Keyword datatype is Experimental currently.

Is there another way to lowercasing value of keyword field?

this is mapping

properties : {
  "country" : {

Add documents


Now, want to search both US and us.
this expected to return two document above.


How can I do that without using experimental feature?

You can use ingest node and lowercase your field at index time.

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