Re: PGXS: REGRESS_OPTS=--load-language=plpgsql

Takahiro Itagaki <itagaki.takahiro@oss.ntt.co.jp> writes:
> David Fetter <david@fetter.org> wrote:
>> support both pre-9.0 and post-9.0 PostgreSQLs.  David Wheeler has
>> suggested that we special-case PL/pgsql for 9.0 and greater, as it's
>> in template0, where those tests are based.

> +1 for the CREATE LANGUAGE IF NOT EXISTS behavior.

> The regression test in the core is targeting only its version,
> but some external projects have version-independent tests.

I think it's more like "are under the fond illusion that their tests are
version-independent".  Are we going to back out the next incompatible
change we choose to make as soon as somebody notices that it breaks a
third-party test case?  I don't think so.  Let me point out that
choosing to install plpgsql by default has already broken "--single"
restore of practically every pg_dump out there.  Nobody batted an eye
about that.  Why are we suddenly so concerned about its effects on
unnamed test suites?
        regards, tom lane