Github user gatorsmile commented on the issue:
https://github.com/apache/spark/pull/13907
Nope. If users do not specify the intput and output formats. We will use
the default `INPUTFORMAT`, which is `org.apache.hadoop.mapred.TextInputFormat`
and the default `OUTPUTFORMAT`, which is
`org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat`. This is different
from the standard input and output formats for `ORC`:
`org.apache.hadoop.hive.ql.io.orc.OrcInputFormat` and
`org.apache.hadoop.hive.ql.io.orc.OrcOutputFormat`.
I am not sure whether we should still convert it. Please let me know if you
think we should still convert them. Thanks!
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