I understand that but I need to build an interface so that my user can change the default values of some table/columns. So I need a way to query the current default value to show the user what it is currently. For instance, let's say I have a table products and there is a column price and the default price is $199, I'd like to get that $199 and give my user the opportunity to update that value. The column does not have any sequence attached to it. JCR
----- Original Message ---- From: Ketema Harris <ketema@gmail.com> To: Jean-Christophe Roux <jcxxr@yahoo.com> Cc: pgsql-php@postgresql.org Sent: Monday, November 13, 2006 9:59:29 AM Subject: Re: [PHP] get column default value
The default value for a column is just that the value you say is default. It only come into play when you do an insert into the table. If you do not provide a value for that column then your default value is entered.
Now if you set the default value of a column to a sequence, then you can manage the sequence using the sequence functions: currval, nextval, and setval. Sequences and their functions are documented in the pg manual.
On Nov 13, 2006, at 9:49 AM, Jean-Christophe Roux wrote:
Hello, How can I get the default value for a column? To change the default value, something like ALTER TABLE dummy ALTER COLUMN value SET DEFAULT -12; would do the job, but how could I query the value?
