Re: pg_upgrade failed if view is based on sequence

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Thom Brown <thom(at)linux(dot)com>
Cc: tushar <tushar(dot)ahuja(at)enterprisedb(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: pg_upgrade failed if view is based on sequence
Date: 2017-07-20 13:48:17
Message-ID: 7187.1500558497@sss.pgh.pa.us
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Thom Brown <thom(at)linux(dot)com> writes:
> On 20 July 2017 at 13:23, tushar <tushar(dot)ahuja(at)enterprisedb(dot)com> wrote:
>> postgres=# create sequence seq_9166 start 1 increment 1;
>> CREATE SEQUENCE
>> postgres=# create or replace view v3_9166 as select * from seq_9166;
>> CREATE VIEW

> This is because sequence_name, start_value, increment_by, max_value,
> min_value, cache_value and is_cycled are no longer output when
> selecting from sequences.

Yes. This will not be "fixed"; you'll have to adjust the view before
you can update it to v10. (If you want those values, you should now
get them out of the pg_sequence catalog.)

This should have been called out as a significant incompatibility
in the v10 release notes, but I see that it's not listed in the
right section. Will fix that ...

regards, tom lane

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