expression: handle ENUM in builtin function Values() (#9225)#9280

Merged

zz-jason merged 1 commit intopingcap:release-2.1from zz-jason:cherrypick/2.1-values-enum

Feb 12, 2019

+30-14

Commits on Feb 12, 2019

expression: handle ENUM in builtin function Values() (pingcap#9225 )
zz-jason
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