Cleanup unnecessary params for date_histogram

[timroes]

This PR tests if we can safely remove the extended_bounds and min_doc_count of the date_histogram.

The extended_bounds seems never to be set so we should safely be able to remove it, since it was never be part of the query.

Without min_doc_count (which was always 1 as far as I can see) we will get empty buckets within the available data range, which should just increase the response slightly but not change anything else.

Since both of those params won't be available on the new auto date histogram aggregation in ES (and @colings86 is thinking about removing at least min_doc_count completely also from date histogram) we need to check out if we actually still need them in Kibana.

[elasticmachine]

💔 Build Failed

• continuous-integration/kibana-ci/pull-request

[elasticmachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request

[timroes]

Jenkins, test this

[elasticmachine]

💔 Build Failed

• continuous-integration/kibana-ci/pull-request

[timroes]

Jenkins, test this - flaky tag cloud test

[markov00]

I think this is not enough because our current visualisation depends on the output created by the min_doc_count:1. 'm attaching two area chart examples

This the current version

This is the PR version

Or we need to change the vis lib to correct this behaviour, or it's better to wait for EUICharts for remove these query params

[elasticmachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request

[bhavyarm]

Same as @markov00 here.

[ppisljar]

hmm, have a hard time finding it, but there is an enchantment request asking for this option :)

we should make the zero filling configurable. two examples:

• i am looking at the temperature sensor. i take a measurment every hour. few data points are missing as the sensor was offline at that time. i don't want zero values here.
• i am looking at crime numbers. if on some day there was no crime events, then i want to zero fill them

the zero filling should in my opinion happen on kibana side, so we have full control over it and its something that shouldn't require many resources.

[markov00]

Hey @ppisljar we already have a ticket for tracking this feature: #17717
This will be possibly supported with the new chart implementation

[timroes]

I will close this, since we cannot simply remove this parameters. That will then also be a trouble switching over to date auto histogram unless those parameters are enabled there.