[IMPALA-4993] Add support for dictionary filtering on nested fields

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 2.9.0
• Fix Version/s: Impala 2.12.0
• Component/s: Backend
• Labels: ramp-up
• Assignee: Vuk Ercegovac
• Reporter: Joe McDonnell
• Created: 25/Feb/17 00:49
• Updated: 20/Jan/18 00:12
• Resolved: 20/Jan/18 00:12

Description

Parquet dictionary filtering currently supports only non-nested data. It would be useful to be able to filter on nested data.

Filtering can only happen if the value of the nested data is required to be non-empty.

Issue Links

• is related to: IMPALA-4985 Evaluate parquet::Statistics to skip data in nested types