add distinct optimization#3077

Merged

yikeke merged 8 commits into

pingcap:masterfrom

zz-jason:distinct-optimization

Jul 16, 2020

Commits on Jun 30, 2020

Commits on Jul 6, 2020

Apply suggestions from code review

authored

Commits on Jul 11, 2020

Update agg-distinct-optimization.md

zz-jason
and
SunRunAway
authored

Commits on Jul 13, 2020

category meta is not needed any longer
yikeke
authored

Commits on Jul 16, 2020