Do not use + for DATE arithmetic! Use, for example + INTERVAL 1 YEAR
> -----Original Message----- > From: h...@tbbs.net [mailto:h...@tbbs.net] > Sent: Thursday, October 04, 2012 9:35 PM > To: mysql@lists.mysql.com > Subject: date-IFNULL-sum bug? > > Can anyone explain this to me? > The first one seems quite wrong; the rest make perfect sense. > > mysql> select ifnull(date('1900/5/3'), date('1900/01/01')) + 10000; > +------------------------------------------------------+ > | ifnull(date('1900/5/3'), date('1900/01/01')) + 10000 | > +------------------------------------------------------+ > | 11900 | > +------------------------------------------------------+ > 1 row in set (0.00 sec) > > mysql> select ifnull(date('1900/5/3'), date('1900/01/01')); > +----------------------------------------------+ > | ifnull(date('1900/5/3'), date('1900/01/01')) | > +----------------------------------------------+ > | 1900-05-03 | > +----------------------------------------------+ > 1 row in set (0.00 sec) > > mysql> select date('1900/5/3') + 10000; > +--------------------------+ > | date('1900/5/3') + 10000 | > +--------------------------+ > | 19010503 | > +--------------------------+ > 1 row in set (0.00 sec) > > mysql> select date(date('1900/5/3') + 10000); > +--------------------------------+ > | date(date('1900/5/3') + 10000) | > +--------------------------------+ > | 1901-05-03 | > +--------------------------------+ > 1 row in set (0.00 sec) > > (5.5.8 under muSoft Windows) > > > -- > MySQL General Mailing List > For list archives: http://lists.mysql.com/mysql > To unsubscribe: http://lists.mysql.com/mysql -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql
