expression: fix a bug that `from_unixtime` + `unio ... (#20225)#20240

Merged

zz-jason merged 6 commits intopingcap:release-4.0from ti-srebot:release-4.0-5eaaa5c64909

Oct 3, 2020

+18-2

Commits on Sep 27, 2020

cherry pick pingcap#20225 to release-4.0

wjhuang2016
authored and
ti-srebot
committed

Commits on Sep 29, 2020

Merge branch 'release-4.0' into release-4.0-5eaaa5c64909
wjhuang2016
authored