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  1. IMPALA
  2. IMPALA-3006

Impala may use incorrect bit order with BIT_PACKED encoding

          Details

          • Type: Bug
          • Status: Resolved
          • Priority: Major
          • Resolution: Won't Fix
          • Affects Version/s: Impala 2.5.0
          • Fix Version/s: None
          • Component/s: Backend

            Description

            Wes stated on IMPALA-3000:

            It's unlikely Impala has ever seen this code path as all of its own Parquet data is encoded with the main RLE encoding – but conceivably there could be BIT_PACKED code floating around out there. But then there's a separate issue because BIT_PACKED uses MSB-ordered packing, while BitReader unpacks in LSB order (see the parquet-format). It may be worth disabling BIT_PACKED altogether if it is incorrect.

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                is related to

                Bug - A problem which impairs or prevents the functions of the product. IMPALA-5636 Impala writer claims that file uses BIT_PACKED encoding when it doesn't

                • Minor - Minor loss of function, or other problem where easy workaround is present.
                • Resolved

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                    • Assignee:
                      Unassigned
                      Reporter:
                      tarmstrong Tim Armstrong
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                      Dates

                      • Created:
                        Updated:
                        Resolved: