Zhenghua Gao created FLINK-13280:
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Summary: Revert blink changes in DateTimeUtils, and keep it same
as flink version.
Key: FLINK-13280
URL: https://issues.apache.org/jira/browse/FLINK-13280
Project: Flink
Issue Type: Sub-task
Reporter: Zhenghua Gao
Fix For: 1.9.0, 1.10.0
This class have some diff between flink/blink planner:
* Blink intros some constants (e.g., MICROS_PER_DAY, SECONDS_PER_DAY), inner
use, it does not matter.
* Blink intros a function unixDateTimeToString (new)
* Blink changes the behavior of some function
* dateStringToUnixDate: only used in test & codegen now, can be moved into
another util class
* timeStringToUnixDate: only used in test & codegen now, can be moved into
another util class
* Blink intros USER TimeZone, but now it’s always UTC TimeZone, so it does not
matter
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