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  1. MariaDB ColumnStore
  2. MCOL-2222

Use JIT for aggregation functions

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    Details

    • Type: Bug
    • Status: Open (View Workflow)
    • Priority: Minor
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: PrimProc
    • Labels:

      Description

      CS uses Volcano processing approach working on one value at a time. This is very inefficient way for analytics workload that usually uses lots of aggregation functions in projections, filtering or sorting.
      We are interested in using JIT for basic aggregation functions: sum, avg, count, min, max. The patch must compile and run a program that processes and returns the aggregation function result. We were written this description having LLVM in mind as it is widespread and has a lots of examples in the wild.
      I suggest to start looking at RowAggregation::addRowGroup() from ./utils/rowgroup/rowaggregation.cpp to get what it takmakees to get avg() function result.
      Here is the link on how to build fast a CS developer environment.

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            Assignee:
            drrtuy Roman
            Reporter:
            drrtuy Roman
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              Created:
              Updated: