pingcap/tidb

Partial2Mode is not necessary in hash aggregation

Open

#15.271 aberto em 10 de mar. de 2020

Ver no GitHub
 (5 comments) (0 reactions) (0 assignees)Go (6.186 forks)batch import
help wantedsig/executiontype/enhancementtype/performance

Métricas do repositório

Stars
 (40.090 stars)
Métricas de merge de PR
 (Mesclagem média 14d 4h) (346 fundiu PRs em 30d)

Description

Feature Request

Is your feature request related to a problem? Please describe:

hash aggregation with Coprocessor fetches partial results from storage and runs

  1. Partial2Mode, partial results --> partial results
  2. FinalMode, partial results --> final results

It seems that Partial2Mode is a redundant run, we can remove it for better code and performance.

Describe the feature you'd like:

Describe alternatives you've considered:

Teachability, Documentation, Adoption, Migration Strategy:

Guia do colaborador