Re: adding column constraint

Hmmm... I got it to work, but using a slightly different syntax. Let me
see if I understand your example:

ALTER TABLE
cust # the table to be altered
ADD CONSTRAINT
fk_cust_bd_id # the column in cust to add the constraint?
FOREIGN KEY
(bd_id) # foreign key in bill_dist?
REFERENCES
bill_dist (bd_id); # specifies the column in bill_dist to use?

Oddly, I put the foreign table name in place of fk_cust_bd_id and the
local column name where you have (bd_id). It seemed to work. Is the
identifier after ADD CONSTRAINT a noop?

BTW, the problem with the example in the man page is that its impossible
to tell which identifiers are table names and which are column names and
which column names go with which table, etc. The format above (with
comments) would help a lot. (Or use identifiers like
the_table_to_be_altered and so on.)

Tim

mikeo wrote:
>
> alter table cust add constraint fk_cust_bd_id foreign key (bd_id)
> references bill_dist (bd_id);
>
> At 12:57 PM 7/26/00 -0700, Timothy H. Keitt wrote:
> >Can someone give an example of how to add a foreign key constraint to an
> >existing table? (Pgsql and the man page differ and neither syntax seems
> >to work.)
> >
> >I've tried:
> >
> >alter table mytable add constraint col foreign key references reftable
> >
> >with no luck.
> >
> >Tim
> >
> >--
> >Timothy H. Keitt
> >National Center for Ecological Analysis and Synthesis
> >735 State Street, Suite 300, Santa Barbara, CA 93101
> >Phone: 805-892-2519, FAX: 805-892-2510
> >http://www.nceas.ucsb.edu/~keitt/
> >

--
Timothy H. Keitt
National Center for Ecological Analysis and Synthesis
735 State Street, Suite 300, Santa Barbara, CA 93101
Phone: 805-892-2519, FAX: 805-892-2510
http://www.nceas.ucsb.edu/~keitt/