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If u didn’t disabled anything default from settings, elasticsearch does for you when a field is not stored (default) and the _source field is enabled (default too).
By default, Elasticsearch keeps a copy of all the JSON documents you offer it for indexing in a field called _source . You get a copy of this stored data on each query that matches the document. So yes: you are able to store your data in Elasticsearch and retrieve it too.
How ElasticSearch works: https://medium.com/tech-explained/can-elasticsearch-store-data-4b840308ea6f
Source:stackexchange.com