[IMPALA-6076] Add deprecation warning for BIT_PACKED encoding.

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 2.10.0
• Fix Version/s: Impala 2.11.0
• Component/s: Backend
• Labels: parquet
• Target Version: Impala 2.11.0
• Epic Color: ghx-label-2
• Assignee: Tim Armstrong
• Reporter: Tim Armstrong
• Created: 18/Oct/17 20:35
• Updated: 24/Oct/17 22:15
• Resolved: 24/Oct/17 22:15

Description

Per IMPALA-3006, the BIT_PACKED decoding in the parquet scanner is deprecated and the implementation is actually incorrect. We should add a warning with the intent of removing the support in a later release.

Note that because of IMPALA-5636 Impala-generated Parquet files may claim to use BIT_PACKED encoding when they don't, so we should really only issue the warning if the encoding is used in a data page.

Issue Links

• is depended upon by: IMPALA-6077 remove BIT_PACKED encoding for Parquet levels