Elasticsearch match_all default sort?

Elastic Stack Elasticsearch
1

How elaticsearch sort in case of match_all query when the _score is 1 of all the documents available in an index?

2

Not sure about the details but you should never rely on it IMO.
What is your problem if any?

3

Thanks for such a quick reply .
I have been doing a semester project on ElasticSearch.
I am just doing some educational research on elasticsearch.
I just want to know about the default sorting mechanism of match_all query.
and why it returns only 10 document when we use match_all query.
kindly reply fast.

4

It always returns by default 10 documents whatever the query is.

See https://www.elastic.co/guide/en/elasticsearch/reference/current/search-request-from-size.html

5

My question is which 10 it returns by default ?
there must be some kind of mechanism of choosing those 10 (particularly the case of match_all in which the score of all the available docs is 1).

6

I'd say the 1st 10 of each shard then the first 10 of that aggregated list.

But it does not matter IMO.

7

Thanks Mr. David

After your last reply, is it safe to say that elasticsearch doesnt apply any sort in match_all query?

8

I think you can say that.

1 Like
9

Thanks for your help Mr. David

10

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