ddl: refine pre-split region logic (#11794)#11797

Merged

winkyao merged 2 commits intopingcap:release-2.1from sre-bot:release-2.1-5d88749b6f9e

Aug 26, 2019

+21-13

Commits on Aug 20, 2019

ddl: refine pre-split region logic

crazycs520
authored and
root
committed

Commits on Aug 26, 2019

Merge branch 'release-2.1' into release-2.1-5d88749b6f9e
crazycs520
authored