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Re: Select fails when cookie tried to get a numeric value

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On Sun, Oct 6, 2013 at 1:31 AM, Νίκος Αλεξόπουλος <nikos.gr33k@gmail.com> wrote:
>                 # find the visitor record for the (saved) cID and current
> host
>                 cur.execute('''SELECT * FROM visitors WHERE counterID = %s
> and cookieID = %s''', (cID, cookieID) )
>
>                 data = cur.fetchone()        #cookieID is unique
>
>                 if not data:
>
>                         # first time visitor on this page, create new record
>                         cur.execute('''INSERT INTO visitors (counterID,
> cookieID, host, city, useros, browser, ref, lastvisit) VALUES (%s, %s, %s,
> %s, %s, %s, %s, %s)''', (cID, cookieID, host, city, useros, browser, ref,
> lastvisit) )
>                 else:
>                         # found the page, save its primary key for later use
>                         vID = data[0]
>                         # UPDATE record using retrieved vID
>                         cur.execute('''UPDATE visitors SET host = %s, city =
> %s, useros = %s, browser = %s, ref= %s, hits = hits + 1, lastvisit = %s
>
> WHERE counterID = %s and cookieID = %s''', (host, city, useros, browser,
> ref, lastvisit, vID, cookieID) )

Do you understand the expression "race condition", and how it applies
to the above code? If not, you MUST read up on that before relying on
code like this, and as that's not a Python question, I recommend
Google and Wikipedia.[1]

ChrisA

[1] Yes, I know they're not primary sources. For something like this,
tertiary sources are going to do him fine.

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Select fails when cookie tried to get a numeric value Νίκος Αλεξόπουλος <nikos.gr33k@gmail.com> - 2013-10-05 16:38 +0300
  Re: Select fails when cookie tried to get a numeric value Ned Batchelder <ned@nedbatchelder.com> - 2013-10-05 09:53 -0400
    Re: Select fails when cookie tried to get a numeric value Νίκος Αλεξόπουλος <nikos.gr33k@gmail.com> - 2013-10-05 17:40 +0300
      Re: Select fails when cookie tried to get a numeric value Ned Batchelder <ned@nedbatchelder.com> - 2013-10-05 10:54 -0400
      Re: Select fails when cookie tried to get a numeric value Ned Batchelder <ned@nedbatchelder.com> - 2013-10-05 11:12 -0400
        Re: Select fails when cookie tried to get a numeric value Νίκος Αλεξόπουλος <nikos.gr33k@gmail.com> - 2013-10-05 18:31 +0300
          Re: Select fails when cookie tried to get a numeric value Andreas Perstinger <andipersti@gmail.com> - 2013-10-05 17:47 +0200
          Re: Select fails when cookie tried to get a numeric value Chris Angelico <rosuav@gmail.com> - 2013-10-06 09:36 +1100
        Re: Select fails when cookie tried to get a numeric value Νίκος Αλεξόπουλος <nikos.gr33k@gmail.com> - 2013-10-05 18:52 +0300
          Re: Select fails when cookie tried to get a numeric value Ned Batchelder <ned@nedbatchelder.com> - 2013-10-05 12:08 -0400
            Re: Select fails when cookie tried to get a numeric value Νίκος Αλεξόπουλος <nikos.gr33k@gmail.com> - 2013-10-05 19:14 +0300
              Re: Select fails when cookie tried to get a numeric value Νίκος Αλεξόπουλος <nikos.gr33k@gmail.com> - 2013-10-05 19:17 +0300
                Re: Select fails when cookie tried to get a numeric value Ned Batchelder <ned@nedbatchelder.com> - 2013-10-05 12:42 -0400
                Re: Select fails when cookie tried to get a numeric value Νίκος Αλεξόπουλος <nikos.gr33k@gmail.com> - 2013-10-05 19:53 +0300
      Re: Select fails when cookie tried to get a numeric value Zero Piraeus <z@etiol.net> - 2013-10-05 12:06 -0300
        Re: Select fails when cookie tried to get a numeric value Νίκος Αλεξόπουλος <nikos.gr33k@gmail.com> - 2013-10-05 18:50 +0300
  Re: Select fails when cookie tried to get a numeric value Chris Angelico <rosuav@gmail.com> - 2013-10-05 23:59 +1000
    Re: Select fails when cookie tried to get a numeric value Νίκος Αλεξόπουλος <nikos.gr33k@gmail.com> - 2013-10-05 17:24 +0300
      Re: Select fails when cookie tried to get a numeric value Chris Angelico <rosuav@gmail.com> - 2013-10-06 00:28 +1000
        Re: Select fails when cookie tried to get a numeric value Νίκος Αλεξόπουλος <nikos.gr33k@gmail.com> - 2013-10-05 17:30 +0300
          Re: Select fails when cookie tried to get a numeric value Ned Batchelder <ned@nedbatchelder.com> - 2013-10-05 10:43 -0400
            Re: Select fails when cookie tried to get a numeric value Νίκος Αλεξόπουλος <nikos.gr33k@gmail.com> - 2013-10-05 17:47 +0300
          Re: Select fails when cookie tried to get a numeric value Zero Piraeus <z@etiol.net> - 2013-10-05 11:44 -0300
          Re: Select fails when cookie tried to get a numeric value MRAB <python@mrabarnett.plus.com> - 2013-10-05 17:51 +0100
      Re: Select fails when cookie tried to get a numeric value Νίκος Αλεξόπουλος <nikos.gr33k@gmail.com> - 2013-10-05 17:28 +0300
      Re: Select fails when cookie tried to get a numeric value Andreas Perstinger <andipersti@gmail.com> - 2013-10-05 18:56 +0200
        Re: Select fails when cookie tried to get a numeric value Νίκος Αλεξόπουλος <nikos.gr33k@gmail.com> - 2013-10-05 20:38 +0300
  Re: Select fails when cookie tried to get a numeric value Benjamin Rovny <rdr.vladimir@gmail.com> - 2013-10-05 09:35 -0500
  Re: Select fails when cookie tried to get a numeric value Terry Reedy <tjreedy@udel.edu> - 2013-10-05 18:06 -0400
  Re: Select fails when cookie tried to get a numeric value Denis McMahon <denismfmcmahon@gmail.com> - 2013-10-05 23:36 +0000
    Re: Select fails when cookie tried to get a numeric value Νίκος Αλεξόπουλος <nikos.gr33k@gmail.com> - 2013-10-06 08:20 +0300
      Re: Select fails when cookie tried to get a numeric value Denis McMahon <denismfmcmahon@gmail.com> - 2013-10-06 14:57 +0000
      Re: Select fails when cookie tried to get a numeric value Piet van Oostrum <piet@vanoostrum.org> - 2013-10-06 22:16 -0400

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