feat: add support for datediff expression#3145
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Adds native Comet support for Spark's datediff function, which returns the number of days between two dates (endDate - startDate). Closes apache#3087 Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #3145 +/- ##
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+ Coverage 56.12% 60.02% +3.89%
- Complexity 976 1429 +453
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Files 119 170 +51
Lines 11743 15748 +4005
Branches 2251 2602 +351
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+ Hits 6591 9453 +2862
- Misses 4012 4976 +964
- Partials 1140 1319 +179 ☔ View full report in Codecov by Sentry. 🚀 New features to boost your workflow:
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| FuzzDataGenerator.generateDataFrame(r, spark, schema, 1000, DataGenOptions()) | ||
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| test("datediff") { |
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Tests using dates from leap years would be fun to try. Try this -
datediff( 1900-03-01, 1900-02-27) != datediff(2000-03-01, 2000-02-27)
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Good suggestion! I've added leap year edge case tests:
datediff('1900-03-01', '1900-02-27')= 2 days (1900 was NOT a leap year - divisible by 100 but not 400)datediff('2000-03-01', '2000-02-27')= 3 days (2000 WAS a leap year - divisible by 400)datediff('2004-03-01', '2004-02-28')= 2 days (2004 was a leap year - divisible by 4, not by 100)datediff('2100-03-01', '2100-02-28')= 1 day (2100 will NOT be a leap year - divisible by 100 but not 400)
All tests pass.
Add tests for leap year handling as suggested in review: - 1900 was NOT a leap year (divisible by 100 but not 400) - 2000 WAS a leap year (divisible by 400) - 2004 was a leap year (divisible by 4, not by 100) - 2100 will NOT be a leap year (divisible by 100 but not 400) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
parthchandra
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Jan 21, 2026
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lgtm. pending conflict resolution and ci.
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Thanks for the review @parthchandra |
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Summary
datedifffunctiondatediff(endDate, startDate)= endDate - startDateTest Plan
CometTemporalExpressionSuiteCloses #3087