planner: support trace column prune#31076

Merged

ti-chi-bot merged 16 commits intopingcap:masterfrom Yisaer:trace_column_prune

Jan 1, 2022

+191-47

Commits on Dec 27, 2021

trace column pruner
Yisaer
committed

Commits on Dec 28, 2021

add testcase
Yisaer
committed
add test
Yisaer
committed

Commits on Dec 29, 2021

address the comment
Yisaer
committed

Commits on Dec 30, 2021

Commits on Dec 31, 2021