pingcap/tidb

design vectorized aggregation functions

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#14,217 建立於 2019年12月25日

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help wantedtype/enhancement

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描述

Description

All our aggregation functions (in executor/aggfuncs/aggfuncs.go) used by the execution engine are row-based. We can vectorize them to improve their performance like what we do for all scalar functions.

Difficulty

  • Medium

Score

  • 3000

Mentor(s)

  • @SunRunAway
  • @XuHuaiyu
  • @qw4990

Recommended Skills

  • Go programming

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