Re: Testing DDL deparsing support

Robert Haas wrote:
> On Thu, Nov 27, 2014 at 11:43 PM, Ian Barwick <ian@2ndquadrant.com> wrote:

> > A simple schedule to demonstrate this is available; execute from the
> > src/test/regress/ directory like this:
> >
> >     ./pg_regress \
> >       --temp-install=./tmp_check \
> >       --top-builddir=../../.. \
> >       --dlpath=. \
> >       --schedule=./schedule_ddl_deparse_demo
> 
> I haven't read the code, but this concept seems good to me.

Excellent, thanks.

> It has the unfortunate weakness that a difference could exist during
> the *middle* of the regression test run that is gone by the *end* of
> the run, but our existing pg_upgrade testing has the same weakness, so
> I guess we can view this as one more reason not to be too aggressive
> about having regression tests drop the unshared objects they create.

Agreed.  Not dropping objects also helps test pg_dump itself; the normal
procedure there is run the regression tests, then pg_dump the regression
database.  Objects that are dropped never exercise their corresponding
pg_dump support code, which I think is a bad thing.  I think we should
institute a policy that regression tests must keep the objects they
create; maybe not all of them, but at least a sample large enough to
cover all interesting possibilities.

-- 
Álvaro Herrera                http://www.2ndQuadrant.com/
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