melin commented on pull request #4910:
URL: https://github.com/apache/hudi/pull/4910#issuecomment-1061377329


   spark 3.3 column support default value,
   https://github.com/apache/spark/pull/35690#event-6193149095
   
   Yann Byron ***@***.***> 于2022年3月8日周二 11:29写道:
   
   > @xiarixiaoyao <https://github.com/xiarixiaoyao> 'Cause this pr is so
   > huge. So please help me to sort the implement out.
   >
   >    1. do the SerDeHelper.LATESTSCHEMA attribute of one commit file and
   >    the SAVE_SCHEMA_ACTION file save the same thing, or can they convert
   >    each other?
   >    2. if enable hoodie.schema.evolution.enable, will every commit persist
   >    SerDeHelper.LATESTSCHEMA in meta file ?
   >    3. When will commit the SAVE_SCHEMA_ACTION file? Once that schema is
   >    changed ?
   >    4. How to make the Hudi Table with old version like 0.10 compatible
   >    with this ? If enable hoodie.schema.evolution.enable on an existed
   >    old-version hudi table, what will happen? Or we are not about to make 
them
   >    compatible, then how to refuse this.
   >    5. this pr can work when enable hoodie.metadata.enable ?
   >    6. why we need to separate Spark3.1 and Spark3.2?
   >
   > —
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