[GitHub] [hudi] alexeykudinkin commented on pull request #4789: [HUDI-1296] Support Metadata Table in Spark Datasource

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alexeykudinkin commented on pull request #4789:
URL: https://github.com/apache/hudi/pull/4789#issuecomment-1036696040


   This is current MT layout in Spark DS
   ```
   +------------------+----+--------------------+-------------------+-------------------+
   |               key|type|  filesystemMetadata|BloomFilterMetadata|ColumnStatsMetadata|
   +------------------+----+--------------------+-------------------+-------------------+
   |        2015/03/16|   2|{4b2d6e17-e6bf-4b...|               null|               null|
   |        2015/03/17|   2|{5e2c7eb4-e58d-48...|               null|               null|
   |        2016/03/15|   2|{1abe3051-0997-4d...|               null|               null|
   |__all_partitions__|   1|{2016/03/15 -> {0...|               null|               null|
   +------------------+----+--------------------+-------------------+-------------------+
   ```
   
   It differs from what we have discussed in [HUDI-1296](https://issues.apache.org/jira/browse/HUDI-1296), and as i've already mentioned in the description that would be addressed in a follow-up PR after current implementation of MOR Relations will be cleaned up (read de-duped)


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