On 06/10/2012 08:35 PM, Wolfgang Meiners wrote:
So my question is: (how) can i write an integrity constraint in sqlite3
(version 3.6.12) which is equivalent to the part
SELECT CASE
WHEN EXISTS (SELECT * FROM ausleihen
WHERE (beid = NEW.beid) AND (rueckgabe is\
NULL))
THEN RAISE(ROLLBACK, 'Buch ist ausgeliehen')
END;
of the trigger?
Moin Wolfgang,
it's possible that I don't understand your problem, but why are doing a
rollback if you don't have changed anything in your database?
Regards
Guenther
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