Re: Removing pg_migrator limitations

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Bruce Momjian <bruce(at)momjian(dot)us>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>
Subject: Re: Removing pg_migrator limitations
Date: 2009-12-28 15:58:30
Message-ID: 603c8f070912280758t77f38d33ycf0d9a81f91d592c@mail.gmail.com
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On Mon, Dec 28, 2009 at 10:48 AM, Bruce Momjian <bruce(at)momjian(dot)us> wrote:
> Robert Haas wrote:
>> On Sun, Dec 27, 2009 at 2:16 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>> > On Sun, Dec 27, 2009 at 9:53 AM, Bruce Momjian <bruce(at)momjian(dot)us> wrote:
>> >> Bruce Momjian wrote:
>> >>> There are several pg_migrator limitations that appeared late in the 8.4
>> >>> development cycle and were impossible to fix at that point. ?I would
>> >>> like to fix them for Postgres 8.5:
>> >>>
>> >>> ? ? ? ? o ?a user-defined composite data type
>> >>> ? ? ? ? o ?a user-defined array data type
>> >>> ? ? ? ? o ?a user-defined enum data type
>> >>
>> >> FYI, these pg_migrator restrictions are now gone when migrating to PG
>> >> 8.5, even _from_ PG 8.3.
>> >
>> > Wow, cool. ?That seems like a good step forward.
>>
>> It appears that the pg_migrator README needs a bit of revision to make
>> it more clear which limitations apply to migration between which
>> versions.  In particular, the current wording suggests that NONE of
>> the limitations apply to 8.3 -> 8.5 migrations, which is not the case
>> - e.g. we haven't done anything about the need to rebuild certain
>> types of indices.
>
> Very true. I have just made a new pg_migrator release with an updated
> README file.

Ah, cool. So this seems to imply that a migration from 8.4 to 8.5
should be clear sailing. Is that correct?

...Robert

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