Strengthen tests for
5ef34a8fc3
The test query in
5ef34a8fc3 is running over the empty emp1 table giving the
same (empty) return both with and without the fix. Add one row to that table
to make not just the test query plan, but also the test query result different.
Reported-by: Richard Guo
Bug: #18261
Discussion: https://postgr.es/m/CAMbWs49igjcszLgicb4D1N21_5iNDoxheJ7KFmAcs_z%3DLx6jhg%40mail.gmail.com