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  1. MariaDB ColumnStore
  2. MCOL-4916

Introduce integral type based filtering for columns.

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    Details

    • Type: New Feature
    • Status: Closed (View Workflow)
    • Priority: Major
    • Resolution: Won't Do
    • Affects Version/s: 6.1.1
    • Fix Version/s: 6.4.1
    • Component/s: PrimProc
    • Labels:
      None
    • Sprint:
      2021-14, 2021-15

      Description

      As of now the code in primitives/linux-port/column.cpp uses ParsedColumnFilter structure that has two shared_array attributes:

      • prestored_argVals to store columns that less then 8 byte.
      • prestored_argVals128 to store columns that are 16 byte wide.
        Consider ParsedColumnFilter for a float column. It uses prestored_argVals that is an array of int64_t to store float values. This forces 2 extra assignment statements in colCompareDispatcherT for all integral types. This also calls for an explicit cast, e.g. (float*)(&prestored_argVals.get()[i]) in a vectorized filter path. Such casts introduces future issues for big-endian platforms.

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            Assignee:
            drrtuy Roman
            Reporter:
            drrtuy Roman
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              Dates

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              Updated:
              Resolved:

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