expression: change the round rule for approximate value to `round to nearest even` (#21324)#21628

Merged

ti-srebot merged 3 commits intopingcap:release-4.0from ti-srebot:release-4.0-8a3705ee4040

Jan 26, 2021

+14-16

Commits on Dec 10, 2020

cherry pick pingcap#21324 to release-4.0

Xuhui Lu
authored and
ti-srebot
committed

Commits on Jan 26, 2021