advancedxy commented on issue #25739: [WIP][SPARK-28945][CORE][SQL] Support 
concurrent dynamic partition writes to different partitions in the same table
URL: https://github.com/apache/spark/pull/25739#issuecomment-529938706
 
 
   > what would concurrent writes to the same table with 
dynamicPartitionOverwrite disabled look like? i have a hard time coming up with 
a useful example of this.
   
   Suppose we have a table with partition columns (day, hour, action). It would 
be useful to support 
   concurrent writes to `Partition(day=20190910, hour=01, action)`, 
`Partition(day=20190910, hour=02, action)` and etc. Or to Partitions: 
`Partition(day=20190910, hour, action)`, `Partition(day=20190909, hour, 
action)` and etc.
   
   The concurrent write would be succeeded as long as the static partitions 
share the same size.

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