(Sorry David. I initially replied only to you)
Ok. I've attached a patch of a proof-of-concept. I have a few
questions about tests.
What is typical workflow to add tests for changes to the planner? Also
I ran make check and it appears one of the existing tests is failing.
What is a typical way for going about discovering why the query plan
for a specific query changed? Also, how should I go about changing the
old test? Should I replace the old test output with the new test
output or modify the old test slightly to get it to produce the same
case as before?
Thanks,
Michael
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