Drop system generated constraint

Question

Hi All,
In a table I am having primary key called abc_pk for column. Mistakenly i have given the same name for foreign key as abc_pk and executed. As of me if same name for constraint then oracle will generate own constraint name such as sys_co4537.. if it is wrong correct me...
if oracle itself generated constraint name then how to find constraint correct constraint name....
case 1: if it single database i can find it in corresponding table with reference key..as (sys_co4537)
case 2: If i am having more than 2 database then it difficult to find because each database will create different name...
pls suggest me how to drop sys_* constraint from different database..
Thanks & Regards
Sami

Answer 1

Hi All,
select * from USER_CONSTRAINTS
where table_name=<<table_name>>
by getting the constraint name, you can drop the constraint by
alter table <<table name>> drop constraint <<constraint name>>;By using above statments user needs to select the constraint name, after that needs to drop it. Instead of that user needs to run as script.. so i have created as block script
as
DECLARE
V_CONSTRAINT_NAME VARCHAR2(30);
BEGIN
SELECT CONSTRAINT_NAME INTO V_CONSTRAINT_NAME FROM USER_CONSTRAINTS WHERE TABLE_NAME = 'ABC' AND R_CONSTRAINT_NAME='ABC_PK';
EXECUTE IMMEDIATE 'ALTER TABLE DEPOSIT_ACCOUNT_INTEREST DROP CONSTRAINT '|| V_CONSTRAINT_NAME;
EXECUTE IMMEDIATE 'ALTER TABLE DEPOSIT_ACCOUNT_INTEREST ADD CONSTRAINT ABC_FK FOREIGN KEY (XXX_ID) REFERENCES DEPOSIT_ACCOUNT XXX_ID) DEFERRABLE INITIALLY DEFERRED';
END;I think this might me usefull to some one..
Thanks & Regards
Sami.