executor: fix The JSON Data can not import to TiDB correctly by `load data` (#21043)#21074

Merged

ti-srebot merged 7 commits intopingcap:release-4.0from ti-srebot:release-4.0-31ddba99da38

Nov 25, 2020

+37-9

Commits on Nov 16, 2020

cherry pick pingcap#21043 to release-4.0

newcworld
authored and
ti-srebot
committed

Commits on Nov 17, 2020

Merge branch 'release-4.0' into release-4.0-31ddba99da38
ti-srebot
authored

Commits on Nov 19, 2020

Merge branch 'release-4.0' into release-4.0-31ddba99da38
ichn-hu
authored

Commits on Nov 24, 2020

Commits on Nov 25, 2020