This patch separates the ordered append join tests from the other
ordered append tests. It also adds additional constraints to some
queries to speed them up. These changes result in a 3x speedup for
regresscheck-shared.
The sql tests still had version checks and would run EXPLAIN
with different parameters depending on postgres version. Since
all supported postgres versions now support all the parameters
we use we can safely remove the version check.
This PR adds test infrastructure for running tests with shared tables.
This allows having hypertables with specific configurations usable for
all tests. Since these tests also don't require creating a new database
for each test case some of the overhead of the normal tests is removed.
While this will lead to much faster query tests some tests will still
require their own database to test things, but most queres could be moved
to this infrastructure to improve test coverage and speed them up.
