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Posted to commits@hudi.apache.org by GitBox <gi...@apache.org> on 2022/06/10 18:53:55 UTC

[GitHub] [hudi] nsivabalan commented on issue #5685: [SUPPORT] Loading older data with old schema version into Hudi

nsivabalan commented on issue #5685:
URL: https://github.com/apache/hudi/issues/5685#issuecomment-1152644499

   @MikeTipico : Can you try enabling this config https://hudi.apache.org/docs/configurations/#hoodiedatasourcewritereconcileschema . This was initially added for the purpose you are talking about. But the schema evolution have some limitations. 
   
   for eg,
   schema1: col1, col2. 
   schema2: col1, col2, col3(default null)
   
   above one is ok. ie. once the table is upgraded to schema2, you can ingest records w/ schema1 and enable above config and things should be ok
   
   But below one may not work
   schema1: col1, col3
   schema2: col1, col2(default null), col3


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