Function pipeline

tests/fix_db.py:210–218

(request, conn)

@pytest.fixture(params=[True, False], ids=["pipeline=on", "pipeline=off"])
def pipeline(request, conn):
    if request.param:
        if not psycopg.Pipeline.is_supported():
            pytest.skip("pipeline mode not supported")
        with conn.pipeline() as p:
            yield p
        return
    else:
        yield None


@pytest.fixture