g l <orangegr...@live.com> writes:
> Then I run the core regression tests with "make installcheck-parallel
> " for v18beta1 as the document dictates. When the regression test is done,
> only the last 2 log entries are found in logfile, the first 2 entries are not
> printed at all. I run core regression also with v14.15 and v17.2, the results
> are the same. What test suite do I need to run to cover the first 2 branches,
> or could you please show me a example query that can cover them? Thank you
> very much.
The coverage.postgresql.org results are, I believe, for check-world
not just the core tests. You might try contrib/postgres_fdw first,
as that tends to be the non-core test with the most planner coverage.
In any case, the fact that a few of these lines are not reached by
test cases doesn't constitute a bug, and it most certainly doesn't
mean it'd be safe to remove them. Most of the logic in join_is_legal
comes in symmetrical pairs of cases for the two possible orderings
of the two input relations. It's just coincidental which of a pair
of cases will be exercised by a given phrasing of a SQL query.
So I don't feel that we're particularly short on coverage here:
one or the other code path is fully exercised in each case,
according to the coverage.postgresql.org results.
regards, tom lane
