Owen O'Malley created HIVE-5563:
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Summary: Skip reading columns in ORC for count(*)
Key: HIVE-5563
URL: https://issues.apache.org/jira/browse/HIVE-5563
Project: Hive
Issue Type: Bug
Components: File Formats
Reporter: Owen O'Malley
With HIVE-4113, the semantics of ColumnProjectionUtils.getReadColumnIds was
fixed so that an empty list means no columns instead of all columns. (Except
the caveat of the override of ColumnProjectionUtils.isReadAllColumns.)
However, ORC's reader wasn't updated so it still reads all columns.
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