Dong Chen created HIVE-10257:
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Summary: Ensure Parquet Hive has null optimization
Key: HIVE-10257
URL: https://issues.apache.org/jira/browse/HIVE-10257
Project: Hive
Issue Type: Sub-task
Reporter: Dong Chen
Assignee: Dong Chen
In Parquet statistics, a boolean value {{hasNonNullValue}} is used for each
column chunk. Hive could use this value to skip a column, avoid null-checking
logic, and speed up vectorization like HIVE-4478 (in the future, it is not
completed yet).
In this Jira we could check whether this null optimization works, and make
changes if any.
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