Comments on: Disabling foreign key generation in hbm2ddl http://blog.cherouvim.com/disabling-foreign-key-generation-in-hbm2ddl/ software engineering for beginners Fri, 12 Mar 2010 08:22:31 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Michel http://blog.cherouvim.com/disabling-foreign-key-generation-in-hbm2ddl/comment-page-1/#comment-1236 Michel Thu, 24 Dec 2009 09:56:26 +0000 http://blog.cherouvim.com/disable-foreign-key-generation-in-hbm2ddl/#comment-1236 Cool. thx Cool. thx

]]> By: Geir http://blog.cherouvim.com/disabling-foreign-key-generation-in-hbm2ddl/comment-page-1/#comment-994 Geir Sun, 08 Feb 2009 13:43:50 +0000 http://blog.cherouvim.com/disable-foreign-key-generation-in-hbm2ddl/#comment-994 >The most logical question now is “why don’t you want an FK?”. Depends on which database you are using and what you are doing. If you never actually join across the tables having a foreign key, the key only gives you referential integrity assurance. Referential integrity can be assured in other ways. Some databases do not cope with foreign keys and composite primary keys nicely. I have seen examples of tables where the index and key spaces were an order of magnitude larger than the data set. This is a major issue if you have nontrivial amounts of data. >The most logical question now is “why don’t you want an FK?”.

Depends on which database you are using and what you are doing.

If you never actually join across the tables having a foreign key, the key only gives you referential integrity assurance. Referential integrity can be assured in other ways.

Some databases do not cope with foreign keys and composite primary keys nicely. I have seen examples of tables where the index and key spaces were an order of magnitude larger than the data set. This is a major issue if you have nontrivial amounts of data.

]]> By: Tim http://blog.cherouvim.com/disabling-foreign-key-generation-in-hbm2ddl/comment-page-1/#comment-979 Tim Sat, 17 Jan 2009 21:49:19 +0000 http://blog.cherouvim.com/disable-foreign-key-generation-in-hbm2ddl/#comment-979 Cheers for that - save me heaps of time Cheers for that – save me heaps of time

]]> By: Peter http://blog.cherouvim.com/disabling-foreign-key-generation-in-hbm2ddl/comment-page-1/#comment-966 Peter Fri, 05 Sep 2008 04:55:59 +0000 http://blog.cherouvim.com/disable-foreign-key-generation-in-hbm2ddl/#comment-966 Awesome. I need to eliminate foreign keys for my history tables which are mostly duplicates of my regular JPA entities. Awesome. I need to eliminate foreign keys for my history tables which are mostly duplicates of my regular JPA entities.

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