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Re: sqlite3 puzzle

References <a8e71415-57fc-4284-82fe-fae0a6670a67@googlegroups.com> <mailman.540.1358260620.2939.python-list@python.org> <2fce91ea-374c-4f55-9e53-fe4032c2f5fd@googlegroups.com>
Date 2013-01-15 17:13 +0000
Subject Re: sqlite3 puzzle
From Rob Day <robert.day@merton.oxon.org>
Newsgroups comp.lang.python
Message-ID <mailman.544.1358269996.2939.python-list@python.org> (permalink)

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On 15 January 2013 15:51, llanitedave <llanitedave@veawb.coop> wrote:
> Thanks for the suggestion, Rob, but that didn't make any difference.  I've never had an issue with putting the execute object into a variable and calling "fetch" on that variable.
>
> I can accept reality if it turns out that foreign keys simply isn't enabled on the Python distribution of sqlite, although I don't know why that should be the case.  I'm just curious as to why it worked at first and then stopped working.

Well - you might be able to accept that, but I'm not sure I can! If it
was working before, it must be compiled in, and so it must be possible
to make it work again.

http://www.sqlite.org/foreignkeys.html#fk_enable seems to suggest that
"PRAGMA foreign_keys = ON" never returns anything, and it's only
"PRAGMA foreign_keys" which returns 0, 1 or None (when unsupported).
With that in mind, does the following code work?

# open database file

self.geologger_db = sqlite3.connect('geologger.mgc')
self.db_cursor = self.geologger_db.cursor()
self.db_cursor.execute("PRAGMA foreign_keys = ON")
self.db_cursor.execute("PRAGMA foreign_keys")
print self.db_cursor.fetchone()

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sqlite3 puzzle llanitedave <llanitedave@veawb.coop> - 2013-01-14 23:09 -0800
  Re: sqlite3 puzzle Rob Day <robert.day@merton.oxon.org> - 2013-01-15 14:36 +0000
    Re: sqlite3 puzzle llanitedave <llanitedave@veawb.coop> - 2013-01-15 07:51 -0800
      Re: sqlite3 puzzle Rob Day <robert.day@merton.oxon.org> - 2013-01-15 17:13 +0000
        Re: sqlite3 puzzle llanitedave <llanitedave@veawb.coop> - 2013-01-15 12:29 -0800
          Re: sqlite3 puzzle Rob Day <robert.day@merton.oxon.org> - 2013-01-15 22:27 +0000
            Re: sqlite3 puzzle llanitedave <llanitedave@veawb.coop> - 2013-01-15 14:46 -0800
            Re: sqlite3 puzzle llanitedave <llanitedave@veawb.coop> - 2013-01-15 14:46 -0800
        Re: sqlite3 puzzle llanitedave <llanitedave@veawb.coop> - 2013-01-15 12:29 -0800
    Re: sqlite3 puzzle llanitedave <llanitedave@veawb.coop> - 2013-01-15 07:51 -0800
  Re: sqlite3 puzzle inq1ltd <inq1ltd@inqvista.com> - 2013-01-15 11:54 -0500

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