tsungchih opened a new pull request, #7357:
URL: https://github.com/apache/gravitino/pull/7357
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### What changes were proposed in this pull request?
This is the second part (totally 4 planned) of implementation to the
following classes from Java to support Column and its default value, including:
- ColumnDTO
- LiteralDTO
- FunctionArg
- PartitionUtils
We implemented the above four classes in one single PR since they have tight
dependency to each other.
**NOTE** that we haven't implemented the serdes for
`ColumnDTO.default_value` which will be included in the future PR. Its serdes
now are dummy ones to always serialize `ColumnDTO.default_value` to `None` and
deserialize `ColiumnDTO.default_value` as `Column.DEFAULT_VALUE_NOT_SET`.
### Why are the changes needed?
We need to support Column and its default value in python client.
#5202
### Does this PR introduce _any_ user-facing change?
No
### How was this patch tested?
Unit tests
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