when add a parition with storage_cooldown_time property like this:
alter table tablexxx ADD PARTITION p20200421 VALUES LESS THAN("1588262400") ("storage_medium" = "SSD", "storage_cooldown_time" = "2020-05-01 00:00:00");
and show partitions from tablexxx;
the CooldownTime is wrong: 2610-02-17 10:16:40, and what is more, the storage migration is based on the wrong timestamp.
The reason is that the result of DateLiteral.getLongValue is not timestamp.
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