top_hits and sub-aggregations

[bsideup]

Hi!

Why top_hits doesn't allow to have sub-aggregations?

I.e. I want to calculate a median of last N hits in each category

[martijnvg]

because the top_hits agg is a metric aggregations and metric aggs can't
have sub aggs.
How would you determine what last N hit would be the median? On what field
are you going to sort? Maybe instead use the percentile agg?

On 9 February 2016 at 16:01, Sergei Egorov notifications@github.com wrote:

Hi!

Why top_hits doesn't allow to have sub-aggregations?

I.e. I want to calculate a median of last N hits in each category

—
Reply to this email directly or view it on GitHub
#16537.

Met vriendelijke groet,

Martijn van Groningen

[bsideup]

@martijnvg I use "sort" from top_hits for such decisions.

Also, I need to calculate median of exactly last N hits in each category, I can't calculate median (aka 50th percentile) of all hits :(

[clintongormley]

This sounds like you will need to postprocess your results on the client. As @martijnvg says, metric aggs can't support sub-aggs.