PRIMARY KEY-FOREIGN KEY 관계 찾기(MASTER TABLE CONSTRAINT 정보 찾는 SQL)

Question

제품 : ORACLE SERVER
작성날짜 : 2003-06-19
PRIMARY KEY-FOREIGN KEY 관계 찾기
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PURPOSE
이 자료는 MASTER TABLE CONSTRAINT 정보를 찾는 SQL이다.
Explanation
SCOTT의 EMP table의 Foreign Key와 부모 제약 조건을 찾으려면
다음의 질의문을 사용하여 찾을 수 있다.
SQL> alter table dept add constraint dept_pk primary key (deptno);
Table altered.
SQL> alter table emp add constraint emp_dept_fk foreign key(deptno)
references dept(deptno);
Table altered.
SQL> select c.constraint_name as "foreign key",
p.constraint_name as "referenced key",
p.constraint_type,
p.owner,
p.table_name
from dba_constraints c, dba_constraints p
where c.owner = 'SCOTT'
and c.table_name = 'EMP'
and c.constraint_type = 'R'
and c.r_owner = p.owner
and c.r_constraint_name = p.constraint_name;
foreign key referenced key C OWNER TABLE_NAME
EMP_DEPT_FK DEPT_PK P SCOTT DEPT
Example
none
Reference Documents
<Note:1010844.6>

Answer 1

I don't have intimate knowledge of SQL Server, but to me, your code seems reasonable. I guess there is some "fine point" (a bug?) to using self referenceing foreign keys in SQL Server. It doesn't seem plausible that the error originates with the driver, unless it's a very intelligent kind of driver.
A "Gordian Knot" kind of solution to your problem is to ask whether you really need the foreign key constraint in the db schema. Is the table used by something other than your EJB? Anyway, putting logic responsible for the correct functioning of your EJB into the db schema is often a bad practice, as it makes the code harder to understand, maintain, port etc.