MaxGekk commented on pull request #30667:
URL: https://github.com/apache/spark/pull/30667#issuecomment-740463398


   We don't need to catch exceptions from `partitionExists()` in ALTER TABLE .. 
ADD/DROP PARTITION there 
https://github.com/apache/spark/blob/0a612b6a40696ed8ce00997ebb4e76d05adbbd82/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/v2/AlterTableAddPartitionExec.scala#L40
   because the partition spec resolver guaranties fully specified partition id 
after this PR https://github.com/apache/spark/pull/30624


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