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Re: SQLite3 in Python 2.7 Rejecting Foreign Key Insert

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On Sat, 22 Nov 2014 18:11:10 -0800 (PST), llanitedave
<llanitedave@birdandflower.com> declaimed the following:

>I've built a database in SQLite3 to be embedded into a python application using wxPython 2.8.12 and Python 2.7.6.  I'm using Sqliteman to manage the database directly and make changes to the structure when necessary.
>
>One item that's been bugging me is when I'm inserting records into one particular table:
>
>The parent table is called "borehole", and the 'borehole_id' field is TEXT.  It's essentially a name field, because every borehole name is naturally unique, therefore I thought an autoincrementing integer would be superfluous.
>
	Absent an explicit declaration of an auto-increment integer primary
key, SQLite implicitly creates a "rowid" that gets used internally anyway
-- even if you don't see it in a "select * ..." result set. If you define
an auto-increment integer primary key, the internal rowid is not created. 

	So... You might as well use an explicit primary key, and thereby also
save space in related tables as they only need to store an integer rather
than some string field.

	Also note that SQLite3 defaults to using UTF-8 internally (it can be
set for UTF-16BE/LE and maybe some others)... If one of your text strings
was provided using a non-UTF-8 encoding and the other was (possible if
different programs were used to process the data before insertion) they
might visually display the same but be stored differently... Though that
doesn't seem to explain your test "select".



-- 
	Wulfraed                 Dennis Lee Bieber         AF6VN
    wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/

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SQLite3 in Python 2.7 Rejecting Foreign Key Insert llanitedave <llanitedave@birdandflower.com> - 2014-11-22 18:11 -0800
  Re: SQLite3 in Python 2.7 Rejecting Foreign Key Insert Chris Angelico <rosuav@gmail.com> - 2014-11-23 13:22 +1100
    Re: SQLite3 in Python 2.7 Rejecting Foreign Key Insert llanitedave <llanitedave@birdandflower.com> - 2014-11-22 19:54 -0800
      Re: SQLite3 in Python 2.7 Rejecting Foreign Key Insert Michael Torrie <torriem@gmail.com> - 2014-11-22 21:58 -0700
      Re: SQLite3 in Python 2.7 Rejecting Foreign Key Insert Chris Angelico <rosuav@gmail.com> - 2014-11-23 16:41 +1100
        Re: SQLite3 in Python 2.7 Rejecting Foreign Key Insert llanitedave <llanitedave@birdandflower.com> - 2014-11-22 22:08 -0800
          Re: SQLite3 in Python 2.7 Rejecting Foreign Key Insert Chris Angelico <rosuav@gmail.com> - 2014-11-23 17:32 +1100
            Re: SQLite3 in Python 2.7 Rejecting Foreign Key Insert llanitedave <llanitedave@birdandflower.com> - 2014-11-22 22:46 -0800
            Re: SQLite3 in Python 2.7 Rejecting Foreign Key Insert Christian Gollwitzer <auriocus@gmx.de> - 2014-11-23 10:55 +0100
          Re: SQLite3 in Python 2.7 Rejecting Foreign Key Insert "Frank Millman" <frank@chagford.com> - 2014-11-23 10:21 +0200
            Re: SQLite3 in Python 2.7 Rejecting Foreign Key Insert llanitedave <llanitedave@birdandflower.com> - 2014-11-23 17:29 -0800
          Re: SQLite3 in Python 2.7 Rejecting Foreign Key Insert Chris Angelico <rosuav@gmail.com> - 2014-11-23 19:31 +1100
            Re: SQLite3 in Python 2.7 Rejecting Foreign Key Insert Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2014-11-23 11:40 +0200
              Re: SQLite3 in Python 2.7 Rejecting Foreign Key Insert Chris Angelico <rosuav@gmail.com> - 2014-11-23 20:53 +1100
          Re: SQLite3 in Python 2.7 Rejecting Foreign Key Insert Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-11-23 13:01 -0500
          Re: SQLite3 in Python 2.7 Rejecting Foreign Key Insert "Frank Millman" <frank@chagford.com> - 2014-11-24 10:05 +0200
          Re: SQLite3 in Python 2.7 Rejecting Foreign Key Insert Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-11-24 13:44 -0500
          Re: SQLite3 in Python 2.7 Rejecting Foreign Key Insert Chris Angelico <rosuav@gmail.com> - 2014-11-25 10:17 +1100
          Re: SQLite3 in Python 2.7 Rejecting Foreign Key Insert "Frank Millman" <frank@chagford.com> - 2014-11-25 07:31 +0200
          Re: SQLite3 in Python 2.7 Rejecting Foreign Key Insert Chris Angelico <rosuav@gmail.com> - 2014-11-25 17:40 +1100
  Re: SQLite3 in Python 2.7 Rejecting Foreign Key Insert Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-11-23 11:58 -0500
  Re: SQLite3 in Python 2.7 Rejecting Foreign Key Insert llanitedave <llanitedave@birdandflower.com> - 2014-11-23 18:22 -0800
    Re: SQLite3 in Python 2.7 Rejecting Foreign Key Insert Chris Angelico <rosuav@gmail.com> - 2014-11-24 15:49 +1100

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