executor: refactor `joinResultGenerator` to handle the unmatched outer records (#7288)#7315

Merged

zz-jason merged 2 commits intopingcap:release-2.0from zz-jason:cherrypick/7288

Aug 8, 2018

+217-154

Commits on Aug 8, 2018

executor: refactor joinResultGenerator to handle the unmatched outer records (pingcap#7288 )
zz-jason
committed
Merge branch 'release-2.0' into cherrypick/7288
zz-jason
authored