Re: Order by and timestamp

From: Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>
To: Björn Lundin <b(dot)f(dot)lundin(at)gmail(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-general(at)postgresql(dot)org
Subject: Re: Order by and timestamp
Date: 2020-03-16 22:13:41
Message-ID: 1776fcbe-d55a-2059-7abf-0a615896a871@aklaver.com
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On 3/16/20 2:50 PM, Björn Lundin wrote:
>
>
>> 16 mars 2020 kl. 20:26 skrev Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com
>> <mailto:adrian(dot)klaver(at)aklaver(dot)com>>:
>>
>> Per Tom's comment, what are the encodings?
> Just sent reply to his mail with the encodings
>
>
>
>> Also I would point out that the problem occurs on the machine you are
>> dumping/restoring backwards 9.6 --> 9.4. Not sure if that is relevant
>> or not, but worth looking at.
>>
>> How is the dump/restore done(plain text, custom format, etc) and what
>> are the command strings?
>
> I pasted 2 days at pastebin
>
> (with date marking added)
> https://pastebin.com/4E24JLEF
>
>
>
>> Also what versions of pg_dump/pg_restore are you using on the dump and
>> restore sides for the various Postgres versions?
>
> Hmm, now that is tricky,
> The prod has - as I briefly mentioned - been on the AWS
> So I used its pg_dump. But I don’t recall version
> In my notes I can see that we started with an ubuntu 12.04 image
>
> But - I always use the pg_dump that belongs to the source database
> And psql that belongs to the target database
> So insert is
> bnl(at)ibm2:~/db$ psql
> Tidtagning är på.
> AUTOCOMMIT off
> psql (9.6.15, server 9.4.15)
> Skriv "help" för hjälp.

Except you are using psql 9.6.15 against a 9.4.15 server.

What happens if you use psql(9.4.15) to do sort query against 9.4.15 server?

>
> While pg_dump may have varied through the years
> The dump at pastebin gave me no clue of version that created it
>
> Lately (the lsat 2 years or so) it has ben the pg_dump on the pi
> *bnl(at)pibetbot*:*~ $*pg_dump --version
> pg_dump (PostgreSQL) 9.6.10
>
> But not for that data sep/oct 2016
>
>
>> Yes really, otherwise you would not be seeing a difference. Sorry, pet
>> peeve of mine, when people say these two things are not doing the same
>> thing but then say they are the same thing.
>>
>>> I mean, the pg_dump does copy-commands.
>>
>> It also does a certain amount of setup at the beginning of the file.
>
> I stand corrected
>
> --
> Björn Lundin
> b(dot)f(dot)lundin(at)gmail(dot)com <mailto:b(dot)f(dot)lundin(at)gmail(dot)com>
>
>
>
>

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com

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