Add tests to illustrate supported and unsupported join + order by#4635

Merged

sougou merged 3 commits intovitessio:masterfrom planetscale:planetscale-ds-order-by-fail

Feb 22, 2019

+83-1

Commits on Jan 22, 2019

add tests to show that implicit joins with order by work fine if ordering by columns of first table, but not if ordering by columns of second table
deepthi
committed

Commits on Feb 15, 2019