Re: SOLVED - [SQL] foreign keys and lots of tables

2011-05-19 Thread Gary Stainburn
Thanks Dave, I came up with the same answer after much googling. I managed to write a trigger to do this and it worked first time :D Then I realised I was going to have to write more triggers to handle the reverse side, i.e. deleting a coach_train record after a booking has been made. Thanks

Re: [SQL] column type for pdf file

2011-05-19 Thread Emi Lu
Hello all, All right, it seems that everyone thinks saving a pdf into postgresql is not a good idea. My situation is: = . pdf file: 500kb . One year I need to save around 65 files = 32M As a summary, disadvantages are: == . Memory issue when

Re: [SQL] column type for pdf file

2011-05-19 Thread Karsten Hilbert
On Thu, May 19, 2011 at 09:39:54AM -0400, Emi Lu wrote: > All right, it seems that everyone thinks saving a pdf into postgresql > is not a good idea. No. > As a summary, disadvantages are: > == > . Memory issue when read/save/retrieve the file > . Increase load T

Re: [SQL] column type for pdf file

2011-05-19 Thread Craig Ringer
On 05/19/2011 09:53 PM, Karsten Hilbert wrote: On Thu, May 19, 2011 at 09:39:54AM -0400, Emi Lu wrote: All right, it seems that everyone thinks saving a pdf into postgresql is not a good idea. No. Hardly everyone. You lose transaction safety when using file system storage outside the DB, y

Re: [SQL] column type for pdf file

2011-05-19 Thread Emi Lu
Craig, Karsten, Hardly everyone. You lose transaction safety when using file system storage outside the DB, you need another way to talk to the server than just the Pg connection, and most importantly your backups become more complicated because you have two things to back up. It's not simple,