[Lens] Only show fields with data in the filter bar

[flash1293]

The index pattern objects provided by Lens to the query bar and filter bar include every field, which is not what Lens shows by default. They do not include data types Lens ignores such as scripted fields.

We could improve the filter creation UX by removing fields without data in the Lens app, but this might not work in the dashboard embeddable.

[elasticmachine]

Pinging @elastic/kibana-app (Team:KibanaApp)

[wylieconlon]

I agree that this has the potential to be a better user experience, but it also has the potential to crash the filter bar. More work is needed to define a plan that works with these cases:

• Lens doesn't include non-aggregatable fields in its index pattern, but these fields can be searched using both KQL and the filter manager
• When opening Lens from a dashboard, will the filters from the dashboard render correctly?
• Will this affect the indexpattern use by esaggs?

The dashboard embeddable is not an issue because we provide the ID of the index pattern, not a full object.

[flash1293]

I only converted this to an issue (it was a card on the board before). I'm not sure whether we even should do this because it's inconsistent with the behavior of other apps.

I'm fine with closing this because it seems like this would require quite some coordination work to get right with little benefit.

[stratoula]

Thank you for contributing to this issue, however, we are closing this issue due to inactivity as part of a backlog grooming effort. If you believe this feature/bug should still be considered, please reopen with a comment.