Well, you could add a serial column. I'll tell you how, but I haven't tested the code, so be sure to check it! And using BEGIN and COMMIT/ROLLBACK to delimit transactions would not be a bad idea at all ;-)
To add a serial column, just write:
--create new serial field
ALTER TABLE md_customer ADD id SERIAL;
If you check your table now, you will see that your new 'id' column contains correlative values. If this is what you wanted, you could update every tabe referencing md_customer, like this:
--drop foreign key on remote table
ALTER TABLE xxx DROP CONSTRAINT xxx_fk;
--set old pk values to the value in the 'id' field just created
UPDATE xxx SET fk_field=md_customer.id FROM md_customer CU WHERE CU.md_customeridpk=xxx.fk_field;
Check if everything is ok now. If it is, then recreate your foreign key, drop your old pk and rename the new one:
--restore fk on remote table
ALTER TABLE xxx ADD CONSTRAINT xxx_fk FOREIGN KEY (fk_field) REFERENCES md_customer(id) ON DELETE ... ON UPDATE ...;
--drop old pk
ALTER TABLE md_customer DROP md_customeridpk CASCADE;
--rename id to md_customeridpk
ALTER TABLE md_customer RENAME id TO md_customeridpk;
--create pk
ALTER TABLE md_customer ADD CONSTRAINT md_customer_pk PRIMARY KEY(md_customeridpk).
That should be it.
Hope it helps.
On 5/24/06, andi <andi@mobile-elab.com> wrote: Dear friends,
I have table
MD_CUSTOMER
MD_CUSTOMERIDPK integer primary key
NAME varchar
But my primary key is not in correct order like
MD_CUSTOMER
MD_CUSTOMERIDPK NAME
10 ANDI
33 TESTER
100 KKK
, so I want to make other primary key to generate sequences 1, 2, 3, … and in MS SQL SERVER 2005
I can with Rank() function , but in Postgres how ?
PLEASE any one can help me, I am really appreciate.
Best regards
Andi kusnadi
