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## What changes were proposed in this pull request? In the PR, I propose to covert underlying types of timestamp/date columns to strings, and store the converted values as column statistics. This makes statistics for timestamp/date columns independent from system time zone while saving and retrieving such statistics. I bumped versions of stored statistics from 1 to 2 since the PR changes the format. ## How was this patch tested? The changes were tested by `StatisticsCollectionSuite` and by `StatisticsSuite`. Closes #23662 from MaxGekk/column-stats-time-date. Lead-authored-by: Maxim Gekk <max.gekk@gmail.com> Co-authored-by: Maxim Gekk <maxim.gekk@databricks.com> Co-authored-by: Hyukjin Kwon <gurwls223@apache.org> Signed-off-by: Wenchen Fan <wenchen@databricks.com> |
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