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Re: Article on the future of Python

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Date Sat, 29 Sep 2012 01:20:45 +1000
Subject Re: Article on the future of Python
From Chris Angelico <rosuav@gmail.com>
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On Sat, Sep 29, 2012 at 1:14 AM, Ian Kelly <ian.g.kelly@gmail.com> wrote:
> On Fri, Sep 28, 2012 at 8:58 AM, Chris Angelico <rosuav@gmail.com> wrote:
>> Yes, MySQL has definitely improved. There was a time when its
>> unreliability applied to all your data too, but now you can just click
>> in InnoDB and have mostly-real transaction support etc. But there's
>> still a lot of work that by requirement happens outside of
>> transactions - MySQL doesn't let you roll back DDL, for instance.
>
> Neither does Oracle, for that matter.  I don't really see any reason
> why DDL *should* be transactional in nature.  If your web app is
> issuing DDL statements, then you're probably doing something wrong.

I have an auto-update script that ensures that our database is at the
correct patchlevel. It's fairly straight-forward: switch on
patchlevel, execute the statements required to get up to the next one,
at the bottom record the patchlevel in the database. (This relieves us
of issues of schema changes done in development that didn't get pushed
to production, for instance; our source code repository has
_everything_ needed.) If anything goes wrong, Postgres will roll the
transaction back. It doesn't matter if the first statement added a
column to a table and the second does an INSERT... SELECT; they both
get rolled back (as would any change to the patchlevel field, though
that happens at the very end so it's not significant here). I can
guarantee that the patch has either been completely applied or
completely rolled back - exactly what transactions are for.

ChrisA

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Article on the future of Python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-25 09:15 +0100
  Re: Article on the future of Python Kevin Walzer <kw@codebykevin.com> - 2012-09-25 09:26 -0400
    Re: Article on the future of Python Roy Smith <roy@panix.com> - 2012-09-25 09:44 -0400
    Re: Article on the future of Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-25 15:35 +0000
      Re: Article on the future of Python Chris Angelico <rosuav@gmail.com> - 2012-09-26 01:48 +1000
      Re: Article on the future of Python Ramchandra Apte <maniandram01@gmail.com> - 2012-09-26 02:28 -0700
        Re: Article on the future of Python Dwight Hutto <dwightdhutto@gmail.com> - 2012-09-26 05:39 -0400
      Re: Article on the future of Python Kevin Walzer <kw@codebykevin.com> - 2012-09-26 09:30 -0400
        Re: Article on the future of Python Matej Cepl <mcepl@redhat.com> - 2012-09-27 00:44 +0200
        Re: Article on the future of Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-27 00:44 +0000
          Re: Article on the future of Python Chris Angelico <rosuav@gmail.com> - 2012-09-27 15:37 +1000
            Re: Article on the future of Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-27 06:01 +0000
              Re: Article on the future of Python Chris Angelico <rosuav@gmail.com> - 2012-09-27 16:08 +1000
                Re: Article on the future of Python Grant Edwards <invalid@invalid.invalid> - 2012-09-27 13:59 +0000
                Re: Article on the future of Python Chris Angelico <rosuav@gmail.com> - 2012-09-28 00:32 +1000
                Re: Article on the future of Python Walter Hurry <walterhurry@lavabit.com> - 2012-09-28 01:22 +0000
                Re: Article on the future of Python Jason Friedman <jason@powerpull.net> - 2012-09-27 21:05 -0600
                Re: Article on the future of Python "Littlefield, Tyler" <tyler@tysdomain.com> - 2012-09-27 21:14 -0600
                Re: Article on the future of Python Wayne Werner <wayne@waynewerner.com> - 2012-09-27 22:37 -0500
                Re: Article on the future of Python Greg Donald <gdonald@gmail.com> - 2012-09-27 22:50 -0500
                Re: Article on the future of Python Greg Donald <gdonald@gmail.com> - 2012-09-27 23:12 -0500
                Re: Article on the future of Python Chris Angelico <rosuav@gmail.com> - 2012-09-28 14:37 +1000
                Re: Article on the future of Python rurpy@yahoo.com - 2012-09-28 08:52 -0700
                Re: Article on the future of Python rurpy@yahoo.com - 2012-09-28 08:52 -0700
                Re: Article on the future of Python Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-09-28 10:31 -0400
                Re: Article on the future of Python Chris Angelico <rosuav@gmail.com> - 2012-09-29 00:58 +1000
                Re: Article on the future of Python Ian Kelly <ian.g.kelly@gmail.com> - 2012-09-28 09:14 -0600
                Re: Article on the future of Python Chris Angelico <rosuav@gmail.com> - 2012-09-29 01:20 +1000
              Re: Article on the future of Python Serhiy Storchaka <storchaka@gmail.com> - 2012-09-27 12:20 +0300
    Re: Article on the future of Python Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-09-25 12:13 -0400
    Re: Article on the future of Python Paul Rubin <no.email@nospam.invalid> - 2012-09-25 10:27 -0700
  Re: Article on the future of Python "Martin P. Hellwig" <martin.hellwig@gmail.com> - 2012-09-25 06:56 -0700
  Re: Article on the future of Python "Martin P. Hellwig" <martin.hellwig@gmail.com> - 2012-09-25 06:56 -0700
    Re: Article on the future of Python Grant Edwards <invalid@invalid.invalid> - 2012-09-25 18:25 +0000
      Re: Article on the future of Python 88888 Dihedral <dihedral88888@googlemail.com> - 2012-09-25 16:34 -0700
        Re: Article on the future of Python wxjmfauth@gmail.com - 2012-09-25 23:35 -0700
          Re: Article on the future of Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-26 07:23 +0000
            Re: Article on the future of Python wxjmfauth@gmail.com - 2012-09-26 02:31 -0700
              Re: Article on the future of Python Chris Angelico <rosuav@gmail.com> - 2012-09-26 19:55 +1000
                Re: Article on the future of Python wxjmfauth@gmail.com - 2012-09-26 07:19 -0700
                Re: Article on the future of Python Chris Angelico <rosuav@gmail.com> - 2012-09-27 00:24 +1000
                Re: Article on the future of Python wxjmfauth@gmail.com - 2012-09-26 07:50 -0700
                Re: Article on the future of Python Chris Angelico <rosuav@gmail.com> - 2012-09-27 00:56 +1000
                Re: Article on the future of Python wxjmfauth@gmail.com - 2012-09-26 08:17 -0700
                Re: Article on the future of Python wxjmfauth@gmail.com - 2012-09-26 08:17 -0700
                Re: Article on the future of Python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-26 16:08 +0100
                Re: Article on the future of Python Chris Angelico <rosuav@gmail.com> - 2012-09-27 01:18 +1000
                Re: Article on the future of Python wxjmfauth@gmail.com - 2012-09-26 08:45 -0700
                Re: Article on the future of Python wxjmfauth@gmail.com - 2012-09-26 08:45 -0700
                Re: Article on the future of Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-27 09:33 +0000
                Re: Article on the future of Python Alex Strickland <sscc@mweb.co.za> - 2012-09-27 12:43 +0200
                Re: Article on the future of Python Serhiy Storchaka <storchaka@gmail.com> - 2012-09-27 15:46 +0300
                Re: Article on the future of Python Ian Kelly <ian.g.kelly@gmail.com> - 2012-09-27 09:06 -0600
                Re: Article on the future of Python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-27 17:03 +0100
                Re: Article on the future of Python Serhiy Storchaka <storchaka@gmail.com> - 2012-09-27 20:17 +0300
                Re: Article on the future of Python wxjmfauth@gmail.com - 2012-09-27 12:09 -0700
                Re: Article on the future of Python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-27 21:16 +0100
                Re: Article on the future of Python Chris Angelico <rosuav@gmail.com> - 2012-09-28 08:00 +1000
                Re: Article on the future of Python wxjmfauth@gmail.com - 2012-09-27 12:09 -0700
                Re: Article on the future of Python Terry Reedy <tjreedy@udel.edu> - 2012-09-27 15:08 -0400
                Re: Article on the future of Python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-28 10:16 +0100
                Re: Article on the future of Python wxjmfauth@gmail.com - 2012-09-26 07:50 -0700
                Re: Article on the future of Python wxjmfauth@gmail.com - 2012-09-26 07:19 -0700
                Re: Article on the future of Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-27 00:36 +0000
                Re: Article on the future of Python Paul Rubin <no.email@nospam.invalid> - 2012-09-26 09:52 -0700
                Re: Article on the future of Python Chris Angelico <rosuav@gmail.com> - 2012-09-27 03:04 +1000
                Re: Article on the future of Python Paul Rubin <no.email@nospam.invalid> - 2012-09-26 10:32 -0700
                Re: Article on the future of Python wxjmfauth@gmail.com - 2012-09-26 11:35 -0700
              Re: Article on the future of Python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-26 14:21 +0100
            Re: Article on the future of Python Ian Kelly <ian.g.kelly@gmail.com> - 2012-09-26 09:53 -0600
              Re: Article on the future of Python wxjmfauth@gmail.com - 2012-09-26 09:18 -0700
              Re: Article on the future of Python wxjmfauth@gmail.com - 2012-09-26 09:18 -0700
          Re: Article on the future of Python Ethan Furman <ethan@stoneleaf.us> - 2012-09-26 00:17 -0700
          Re: Article on the future of Python Dwight Hutto <dwightdhutto@gmail.com> - 2012-09-26 03:39 -0400
          Re: Article on the future of Python Chris Angelico <rosuav@gmail.com> - 2012-09-26 17:44 +1000
          Re: Article on the future of Python Dwight Hutto <dwightdhutto@gmail.com> - 2012-09-26 04:11 -0400
          Re: Article on the future of Python Terry Reedy <tjreedy@udel.edu> - 2012-09-26 04:13 -0400
            Re: Article on the future of Python wxjmfauth@gmail.com - 2012-09-26 05:19 -0700
              Re: Article on the future of Python Chris Angelico <rosuav@gmail.com> - 2012-09-26 23:43 +1000
              Re: Article on the future of Python Ethan Furman <ethan@stoneleaf.us> - 2012-09-26 09:08 -0700
              Re: Article on the future of Python Terry Reedy <tjreedy@udel.edu> - 2012-09-26 19:24 -0400
            Re: Article on the future of Python wxjmfauth@gmail.com - 2012-09-26 05:19 -0700
          Re: Article on the future of Python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-26 09:34 +0100
            Re: Article on the future of Python wxjmfauth@gmail.com - 2012-09-26 05:17 -0700
              Re: Article on the future of Python alex23 <wuwei23@gmail.com> - 2012-09-26 17:14 -0700
                Re: Article on the future of Python Walter Hurry <walterhurry@lavabit.com> - 2012-09-27 01:37 +0000
            Re: Article on the future of Python wxjmfauth@gmail.com - 2012-09-26 05:17 -0700
          Re: Article on the future of Python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-26 09:37 +0100
          Re: Article on the future of Python Chris Angelico <rosuav@gmail.com> - 2012-09-26 18:44 +1000
          Re: Article on the future of Python Dwight Hutto <dwightdhutto@gmail.com> - 2012-09-26 04:45 -0400
          Re: Article on the future of Python Dwight Hutto <dwightdhutto@gmail.com> - 2012-09-26 04:47 -0400
          Re: Article on the future of Python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-26 10:01 +0100
            Re: Article on the future of Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-27 00:40 +0000
              Re: Article on the future of Python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-27 02:10 +0100
          Re: Article on the future of Python Dwight Hutto <dwightdhutto@gmail.com> - 2012-09-26 05:09 -0400
          Re: Article on the future of Python "Littlefield, Tyler" <tyler@tysdomain.com> - 2012-09-26 07:31 -0600
          Re: Article on the future of Python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-26 14:43 +0100
          Re: Article on the future of Python Chris Angelico <rosuav@gmail.com> - 2012-09-26 23:51 +1000
          Re: Article on the future of Python Ethan Furman <ethan@stoneleaf.us> - 2012-09-26 09:05 -0700
          Re: Article on the future of Python Terry Reedy <tjreedy@udel.edu> - 2012-09-26 16:27 -0400
            Re: Article on the future of Python alex23 <wuwei23@gmail.com> - 2012-09-26 18:38 -0700
          Re: Fwd: Re: Article on the future of Python Terry Reedy <tjreedy@udel.edu> - 2012-09-26 19:29 -0400
          Re: Fwd: Re: Article on the future of Python Chris Angelico <rosuav@gmail.com> - 2012-09-27 09:42 +1000
      Re: Article on the future of Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-26 00:54 +0000
        Re: Article on the future of Python Paul Rubin <no.email@nospam.invalid> - 2012-09-25 18:04 -0700
          Re: Article on the future of Python Chris Angelico <rosuav@gmail.com> - 2012-09-26 14:10 +1000
            Re: Article on the future of Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-26 05:16 +0000
              Re: Article on the future of Python Chris Angelico <rosuav@gmail.com> - 2012-09-26 16:02 +1000
                Re: Article on the future of Python Paul Rubin <no.email@nospam.invalid> - 2012-09-25 23:09 -0700
          Re: Article on the future of Python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-26 09:32 +0100
          Re: Article on the future of Python Hannu Krosing <hannu@krosing.net> - 2012-09-26 12:01 +0200
            Re: Article on the future of Python Roy Smith <roy@panix.com> - 2012-09-26 09:01 -0400
              Re: Article on the future of Python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-26 14:28 +0100
              Re: Article on the future of Python Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-09-26 13:22 -0400
  Re: Article on the future of Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-27 06:13 +0000
    Re: Article on the future of Python Devin Jeanpierre <jeanpierreda@gmail.com> - 2012-09-27 08:11 -0400
      Re: Article on the future of Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-27 14:25 +0000
        Re: Article on the future of Python Devin Jeanpierre <jeanpierreda@gmail.com> - 2012-09-27 12:16 -0400
          Re: Article on the future of Python alex23 <wuwei23@gmail.com> - 2012-09-27 17:59 -0700
            Re: Article on the future of Python Devin Jeanpierre <jeanpierreda@gmail.com> - 2012-09-28 14:50 -0400
              Re: Article on the future of Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-29 03:07 +0000
        Re: Article on the future of Python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-27 17:45 +0100
        Re: Article on the future of Python Chris Angelico <rosuav@gmail.com> - 2012-09-28 02:49 +1000
        Re: Article on the future of Python Devin Jeanpierre <jeanpierreda@gmail.com> - 2012-09-27 12:50 -0400
        Re: Article on the future of Python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-27 17:58 +0100
        Re: Article on the future of Python Ethan Furman <ethan@stoneleaf.us> - 2012-09-27 09:53 -0700
        Re: Article on the future of Python Terry Reedy <tjreedy@udel.edu> - 2012-09-27 15:32 -0400
      Re: Article on the future of Python Bob Martin <bob.martin@excite.com> - 2012-09-28 08:06 +0100
        Re: Article on the future of Python Dwight Hutto <dwightdhutto@gmail.com> - 2012-09-28 03:22 -0400
      Re: Article on the future of Python rusi <rustompmody@gmail.com> - 2012-09-28 05:08 -0700
        Re: Article on the future of Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-28 12:54 +0000
          Re: Article on the future of Python rusi <rustompmody@gmail.com> - 2012-09-28 06:14 -0700
            Re: Article on the future of Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-28 16:33 +0000
    Re: Article on the future of Python Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-27 17:47 +0100
      Re: Article on the future of Python alex23 <wuwei23@gmail.com> - 2012-09-27 17:59 -0700

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