hehuiyuan created HUDI-4683:
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Summary: Fix to use enum class value for default value in
flinkoptions
Key: HUDI-4683
URL: https://issues.apache.org/jira/browse/HUDI-4683
Project: Apache Hudi
Issue Type: Improvement
Reporter: hehuiyuan
### Change Logs
1. Use Enum Class instead of constant string for option default value in
FlinkOptions.
2. fix doc error for default value
!https://user-images.githubusercontent.com/18002496/185736834-81825dc6-9c4f-4633-8783-fb52239ce6a2.png|width=692,height=116!
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