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?
Thanks in advance