Automatically create a multivalued field that consists of values from selected fields

Elastic Stack Elasticsearch
1

I would like to have a field that consists of values of other fields. E.g if a document has 2 fields; name and age, then there will be automatically created a new multivalued field that consists of these two formentioned fields.

Example:
"name" : John
"age" : 20
"combo" : [John, 20]

How can we do this in Elasticsearch? Is it possible to configure in any way to have this behaviour?

2

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