Is it possible to query for all of the values a specific field?
Say I have "articles" and each article has an author, is there a query I can perform to find a list of all authors?
Take a look at the terms aggregation. By default, it returns you the 10 most common values for a field. You can provide a size parameter to get more values than just the top 10 values.
If you would like to retrieve all the values, rather than just the top X most common values, then you can wrap the terms aggregation in a composite aggregation.
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