89bad267d4
### What changes were proposed in this pull request? Refactoring of the `DateTimeUtils.getEpoch()` function by avoiding decimal operations that are pretty expensive, and converting the final result to the decimal type at the end. ### Why are the changes needed? The changes improve performance of the `getEpoch()` method at least up to **20 times**. Before: ``` Invoke extract for timestamp: Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative ------------------------------------------------------------------------------------------------------------------------ cast to timestamp 256 277 33 39.0 25.6 1.0X EPOCH of timestamp 23455 23550 131 0.4 2345.5 0.0X ``` After: ``` Invoke extract for timestamp: Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative ------------------------------------------------------------------------------------------------------------------------ cast to timestamp 255 294 34 39.2 25.5 1.0X EPOCH of timestamp 1049 1054 9 9.5 104.9 0.2X ``` ### Does this PR introduce any user-facing change? No ### How was this patch tested? By existing test from `DateExpressionSuite`. Closes #25881 from MaxGekk/optimize-extract-epoch. Authored-by: Maxim Gekk <max.gekk@gmail.com> Signed-off-by: HyukjinKwon <gurwls223@apache.org> |
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