expression: fix issue that `date_add` and `date_sub` is incompatible with MySQL#9966

Merged

zz-jason merged 1 commit intopingcap:release-2.1from qw4990:release-2.1_9667

Apr 1, 2019

+104-8

Commits on Apr 1, 2019

expression: fix issue that date_add and date_sub is incompatible with MySQL (pingcap#9702 )
qw4990
committed