Group_concat equivalent

Hi all,

I've noticed that this very question was asked a number of times and always closed without an answer.

I am new to Elasticsearch and I've managed to GROUP the hits of a query BY multiple fields, which is good news. Last step I am missing is: inside your aggregated bucket you can then avg, sum, and all sorts of mathematical aggregations.

But I need to come out with a String that is the string concatenation of all the values in the bucket for a certain field. I guess I am literally searching for a GROUP_CONCAT()-like functionality.

Any luck?

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