[Feature] datetime column type support auto-initialized with default CURRENT_TIMESTAMP

[dataalive]

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Description

An auto-initialized column is set to the current timestamp for inserted rows that specify no value for the column.

so when we define a column like sync_at DateTime DEFAULT CURRENT_TIMESTAMP COMMENT "sync time"

Use case

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Related issues

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Are you willing to submit PR?

• [ ] Yes I am willing to submit a PR!

Code of Conduct

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[BePPPower]

I'm willing to develop this feature

[yiguolei]

CTAS support insert into values support insert into select stream load alter table not care about spark dpp load