[Lens] Allow date functions in formula

[flash1293]

Fixes #112851

• Keep functions that produce dates when generating formula out of quick function
• Show date fields in suggestions in the editor
• Extend mathColumn expression function to cast values that are not numbers.

[elasticmachine]

Pinging @elastic/kibana-vis-editors @elastic/kibana-vis-editors-external (Team:VisEditors)

[dej611]

Review in progress, will update...

Lonely timestamp

When using a simple last_value(timestamp) the chart result is 0, I guess it's still a string as the casting didn't kick in yet:

When adding any math operation to it will trigger the casting:

Date ranges error

Fields of type date_range should be excluded:

[flash1293]

Good catch @dej611 , I think it's because there is no inner math operation. I know how to fix it.

[flash1293]

Should be fixed

[dej611]

Forgot to push?

[flash1293]

Yes, sorry

[dej611]

Checked latest version and could not find any new issue! 🎉

[flash1293]

This is basically fixing a bug

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: 0fb18da

Metrics [docs]

Public APIs missing comments

Total count of every public API that lacks a comment. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats comments for more detailed information.

id	before	after	diff
expressions	1734	1739	+5

Any counts in public APIs

Total count of every any typed public API. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats any for more detailed information.

id	before	after	diff
expressions	73	74	+1

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
lens	1.3MB	1.3MB	+193.0B

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
expressions	98.1KB	98.5KB	+447.0B

Unknown metric groups

API count

id	before	after	diff
expressions	2191	2196	+5

ESLint disabled in files

id	before	after	diff
osquery	1	2	+1

ESLint disabled line counts

id	before	after	diff
enterpriseSearch	19	21	+2
fleet	57	63	+6
osquery	103	108	+5
securitySolution	439	445	+6
total			+19

Total ESLint disabled count

id	before	after	diff
enterpriseSearch	20	22	+2
fleet	65	71	+6
osquery	104	110	+6
securitySolution	516	522	+6
total			+20

History

• 💚 Build #83816 succeeded 6d39778
• 💔 Build #83206 failed 381a323
• 💔 Build #82892 failed 47b57fd
• 💔 Build #82234 failed 5f13494
• 💚 Build #81486 succeeded d8d67fd
• 💔 Build #81450 failed 362c543

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

[dokmic]

LGTM👍

[probance-antoine]

hello @flash1293 , thanks for this PR !

If I understand correctly, in 8.6.0 I will be able to calculate the delta between 2 dates, for example last_value(@timestamp) - now() in a lens formula ? What will be the result, an integer or a date ?

[dej611]

@probance-antoine the last_value(@timestamp) formula will output an integer value as milliseconds since the Unix Epoch.

As for the now() function, there's currently nothing like that yet. You can open a feature request for it.