[HIVE-10257] Ensure Parquet Hive has null optimization

• Type: Sub-task
• Status: Patch Available
• Priority: Major
• Resolution: Unresolved
• Component/s: Tests
• Assignee: Dong Chen
• Reporter: Dong Chen
• Created: 08/Apr/15 03:37
• Updated: 19/May/15 08:38

Description

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, Parquet vectorization is not completed yet).

In this Jira we could check whether this null optimization works, and make changes if any.