Re: Odd 9.4, 9.3 buildfarm failure on s390x

On Sun, Sep 30, 2018 at 12:38:46AM +0100, Andrew Gierth wrote:
> >>>>> "Andrew" == Andrew Dunstan <andrew(dot)dunstan(at)2ndquadrant(dot)com> writes:
>
> >> What is the size of a C "int" on this platform?
>
> Andrew> 4.
>
> Hmm.
>
> Because int being more than 32 bits is the simplest explanation for this
> difference.
>
> How about the output of this query:
>
> with d(a) as (values ('11111111-1111-1111-1111-111111111111'::uuid),
> ('22222222-2222-2222-2222-222222222222'::uuid),
> ('3f3e3c3b-3a30-3938-3736-353433a2313e'::uuid))
> select d1.a, d2.a, uuid_cmp(d1.a,d2.a) from d d1, d d2
> order by d1.a asc, d2.a desc;

That also appears to produce the same results:

With 9.4:

postgres=# select version();
version
-------------------------------------------------------------------------------------------------------------------
PostgreSQL 9.4.19 on s390x-ibm-linux-gnu, compiled by clang version 5.0.1 (tags/RELEASE_501/final 312548), 64-bit
(1 row)

...

a | a | uuid_cmp
--------------------------------------+--------------------------------------+-------------
11111111-1111-1111-1111-111111111111 | 11111111-1111-1111-1111-111111111111 | 0
11111111-1111-1111-1111-111111111111 | 22222222-2222-2222-2222-222222222222 | -2147483648
11111111-1111-1111-1111-111111111111 | 3f3e3c3b-3a30-3938-3736-353433a2313e | -2147483648
22222222-2222-2222-2222-222222222222 | 11111111-1111-1111-1111-111111111111 | 1
22222222-2222-2222-2222-222222222222 | 22222222-2222-2222-2222-222222222222 | 0
22222222-2222-2222-2222-222222222222 | 3f3e3c3b-3a30-3938-3736-353433a2313e | -2147483648
3f3e3c3b-3a30-3938-3736-353433a2313e | 11111111-1111-1111-1111-111111111111 | 1
3f3e3c3b-3a30-3938-3736-353433a2313e | 22222222-2222-2222-2222-222222222222 | 1
3f3e3c3b-3a30-3938-3736-353433a2313e | 3f3e3c3b-3a30-3938-3736-353433a2313e | 0
(9 rows)

Then with HEAD:

postgres=# select version();
version
--------------------------------------------------------------------------------------------------------------------
PostgreSQL 12devel on s390x-ibm-linux-gnu, compiled by clang version 5.0.1 (tags/RELEASE_501/final 312548), 64-bit
(1 row)

...

a | a | uuid_cmp
--------------------------------------+--------------------------------------+-------------
11111111-1111-1111-1111-111111111111 | 11111111-1111-1111-1111-111111111111 | 0
11111111-1111-1111-1111-111111111111 | 22222222-2222-2222-2222-222222222222 | -2147483648
11111111-1111-1111-1111-111111111111 | 3f3e3c3b-3a30-3938-3736-353433a2313e | -2147483648
22222222-2222-2222-2222-222222222222 | 11111111-1111-1111-1111-111111111111 | 1
22222222-2222-2222-2222-222222222222 | 22222222-2222-2222-2222-222222222222 | 0
22222222-2222-2222-2222-222222222222 | 3f3e3c3b-3a30-3938-3736-353433a2313e | -2147483648
3f3e3c3b-3a30-3938-3736-353433a2313e | 11111111-1111-1111-1111-111111111111 | 1
3f3e3c3b-3a30-3938-3736-353433a2313e | 22222222-2222-2222-2222-222222222222 | 1
3f3e3c3b-3a30-3938-3736-353433a2313e | 3f3e3c3b-3a30-3938-3736-353433a2313e | 0
(9 rows)

Regards,
Mark

--
Mark Wong http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, RemoteDBA, Training & Services