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Re: Try-except for flow control in reading Sqlite

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From Dennis Lee Bieber <wlfraed@ix.netcom.com>
Subject Re: Try-except for flow control in reading Sqlite
Date Thu, 31 Oct 2013 22:45:05 -0400
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On Thu, 31 Oct 2013 16:08:38 -0700 (PDT), Victor Hooi
<victorhooi@gmail.com> declaimed the following:

>Hi,
>
>You're right, if the databse doesn't exist, the sqlite3 library will simply create it.
>
>Hmm, in that case, what is the Pythonic way to handle this then?
>
>If the database is new, then it won't have the table I need, and it will return something like:
>
>    sqlite3.OperationalError: no such table: my_table
>
>I suppose I can try the query, and catch OperationalError, and if so, create the new schema then?
>
>However, that seems a bit ugly, as I'm guessing OperationalError could be caused by a number of other reasons?
>
>Should I perhaps be using some kind of version table as Burak Aslan suggested?
>
>Cheers,
>victor 
>

	I'd use the capabilities of the database engine to query it for any
existing schema. As shown in my prior post...
-- 
	Wulfraed                 Dennis Lee Bieber         AF6VN
    wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/

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Thread

Try-except for flow control in reading Sqlite Victor Hooi <victorhooi@gmail.com> - 2013-10-27 20:43 -0700
  Re: Try-except for flow control in reading Sqlite Steven D'Aprano <steve@pearwood.info> - 2013-10-28 06:18 +0000
    Re: Try-except for flow control in reading Sqlite Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2013-10-28 10:48 +0100
  Re: Try-except for flow control in reading Sqlite Chris Angelico <rosuav@gmail.com> - 2013-10-28 17:36 +1100
    Re: Try-except for flow control in reading Sqlite Victor Hooi <victorhooi@gmail.com> - 2013-10-27 23:57 -0700
      Re: Try-except for flow control in reading Sqlite Chris Angelico <rosuav@gmail.com> - 2013-10-28 18:01 +1100
        Re: Try-except for flow control in reading Sqlite Steven D'Aprano <steve@pearwood.info> - 2013-10-28 07:19 +0000
      Re: Try-except for flow control in reading Sqlite Chris Angelico <rosuav@gmail.com> - 2013-10-28 18:02 +1100
  Re: Try-except for flow control in reading Sqlite Burak Arslan <burak.arslan@arskom.com.tr> - 2013-10-28 10:17 +0200
  Re: Try-except for flow control in reading Sqlite Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-10-28 19:43 -0400
    Re: Try-except for flow control in reading Sqlite Victor Hooi <victorhooi@gmail.com> - 2013-10-31 16:08 -0700
      Re: Try-except for flow control in reading Sqlite Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-10-31 22:45 -0400

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