Alex Behm 0449b5beab IMPALA-3943: Do not throw scan errors for empty Parquet files. ...

For Parquet files with no row groups but with num_rows=0 in the
file footer the Parquet scanner returns an error indicating
that the file is invalid. This behavior is a regression from
previous Impala versions which used to accept such files.

This patch restores the previous behavior and adds tests.

Change-Id: I50ac3df6ff24bc5c384ef22e0f804a5132adb62e
Reviewed-on: http://gerrit.cloudera.org:8080/4693
Reviewed-by: Alex Behm <alex.behm@cloudera.com>
Tested-by: Internal Jenkins

2016-10-12 09:22:57 +00:00

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