[IMPALA-5548] Minor issues with parquet column readers

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Incomplete
• Affects Version/s: Impala 2.9.0
• Component/s: Backend
• Epic Color: ghx-label-4
• Assignee: Zach Amsden
• Reporter: Zach Amsden
• Created: 20/Jun/17 22:11
• Updated: 14/May/20 18:18
• Resolved: 14/May/20 18:18

Description

Some minor bugs were found while working on parquet column readers; opening a JIRA to track these. Noted during IMPALA-4864, we have a potentially bogus null indicator offset and several data structures would like perform better as unordered rather than ordered maps.