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feat: support pre-binned timeUnit #8971

Merged
merged 11 commits into from
Jun 29, 2023
Merged

feat: support pre-binned timeUnit #8971

merged 11 commits into from
Jun 29, 2023

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kanitw
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@kanitw kanitw commented Jun 27, 2023

Fix #8969

This allows us to use timeUnit without adding unnecessary timeUnit to re-bin the data, if the data has already been binned.

  • handle binned utc
  • bandPosition
  • Add documentation
  • Add unit tests

@kanitw kanitw requested review from domoritz and yhoonkim June 27, 2023 05:40
@kanitw kanitw marked this pull request as ready for review June 27, 2023 05:41
@kanitw kanitw changed the title refactor: extract getDateTimePartAndStep from durationExpr feat: support pre-binned timeUnit Jun 27, 2023
@kanitw kanitw requested a review from fandu-db June 27, 2023 16:29
@kanitw kanitw marked this pull request as draft June 27, 2023 16:30
@kanitw kanitw force-pushed the kw/8969-binned-timeunit branch 3 times, most recently from 4e318f5 to aa264b4 Compare June 28, 2023 04:18
@kanitw kanitw marked this pull request as ready for review June 28, 2023 04:19
@kanitw kanitw force-pushed the kw/8969-binned-timeunit branch 2 times, most recently from f4c4c59 to fd898bb Compare June 28, 2023 19:58
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Just made a minor comment. It looks good to me.

By default, all time units represent date time using local time. To use UTC time, you can add the `utc` prefix (e.g., `"utcyear"`, `"utcyearmonth"`).
- By default, all time units represent date time using local time.
- To use UTC time, you can add the `utc` prefix (e.g., `"utcyear"`, `"utcyearmonth"`).
- For timeUnit in encoding, you can also add `"binned"` prefix (e.g., `"binnedyearmonth"` or `"binnedutcyearmonth"`) for Chronological time unit (i.e., units that are truncated date time)
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Not sure what Chronological time unit means here. Can we just say truncated (or binned) date time directly?

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It's another semantic-based way to explain date trunc (which focus on action being done on the date object, rather than the semantics).

It's a term that Jeff uses in Vega doc. https://vega.github.io/vega/docs/transforms/timeunit/

I added a bit more explanation so I hope it makes more sense now.

@kanitw kanitw enabled auto-merge (squash) June 29, 2023 21:19
@kanitw kanitw merged commit dac5c19 into main Jun 29, 2023
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@kanitw kanitw deleted the kw/8969-binned-timeunit branch June 29, 2023 21:26
BradyJ27 pushed a commit to BradyJ27/vega-lite that referenced this pull request Oct 19, 2023
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Support prebinned timeUnit to avoid unnecessary computations
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