Problem in enabling constraint - after disabling and truncation of table .

Question

Hello Friends,
I have a table called DRR_TABLES that has list of table names . The requirement is to truncate the tables present in DRR_TABLES except KEY_IDS table and table_name like '%TYPE%' table.
written a procedure . successfullly truncating the tables from DRR_TABLES but while enabling constraints after truncation , I am getting problem in enabling constraints .
ERROR at line 1:
ORA-02270: no matching unique or primary key for this column-list
ORA-06512: at "schema123.TRUNCATE_DRR_TABLES ", line 49
ORA-06512: at line 1
Heres is the code .
PROCEDURE TRUNCATE_DRR_TABLES is
x varchar2(200);
v_tablecount number := 0;
cursor c is select TABLE_NAME from DRR_TABLES where population_source='PUBLISHING' and TABLE_NAME != 'KEY_IDS' and TABLE_NAME NOT LIKE '%TYPE%';
BEGIN
DBMS_OUTPUT.PUT_LINE (' TRUNCATING DRR TABLES ...........');
OPEN c ;
LOOP
FETCH c INTO x ;
EXIT WHEN c%NOTFOUND;
for c1 in (select table_name, constraint_name from user_constraints where TABLE_NAME = x and status ='ENABLED' ORDER BY CONSTRAINT_TYPE DESC )
loop
begin
execute immediate ('alter table '||c1.table_name||' disable constraint '||c1.constraint_name|| ' cascade');
NULL;
end;
end loop;
EXECUTE IMMEDIATE 'TRUNCATE TABLE ' || x ;
v_tablecount := v_tablecount + 1 ;
DBMS_OUTPUT.PUT_LINE('TABLE TRUNCATED :'|| x );
END LOOP ;
DBMS_OUTPUT.PUT_LINE (' TOTAL TABLES TRUNCATED ' || v_tablecount );
CLOSE c;
OPEN c ;
LOOP
FETCH c INTO x ;
EXIT WHEN c%NOTFOUND;
for c2 in (select table_name, constraint_name from user_constraints where TABLE_NAME = x and status = 'DISABLED' ORDER BY CONSTRAINT_TYPE)
loop
begin
execute immediate ('alter table '||c2.table_name||' enable constraint '||c2.constraint_name);
NULL;
end;
end loop;
END LOOP ;
CLOSE c ;
END TRUNCATE_DRR_TABLES ;
LINE 49 is the line corresponding to enable constraint statement.
Edited by: kumar73 on 3 Sep, 2012 11:44 PM

Answer 1

It is such a pity that a user having 321 posts till date is unaware of basics of Posting a Question.
1. You need to provide us with your Oracle version
select * from v$version;2. You need to understand and get accustomed to using tags before and after Code or SQL's for better readability.
3. You need to provide us with the Table Structure and the Constraints Definition.
There are many things that looks like Bad Coding practices:
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1. Avoid RBAR (Loops).
2. Implement Bulk Collect.
3. Why do you need to disable the constraints before truncating? Are you kind of handling the Referential Integrity Constraints?
4. Duplicate checking of Disabled Constraints.
5. When the procedure is being executed at Production Environment, are you going to Monitor the DBMS_OUTPUT? Why not Log the Statements into a LOG Table?
6. Why use a TableCount variable? Would the TableCount Variable be not equal to the Number of Records returned by Cursor C?
7. What is the need to use a NULL statement after every Execute Immediate?
8. What is the Need to surround each execute Immediate with Begin .. End block?
9. Where is your Exception handling Block? Forgot to write?
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What has been your effort in finding which Constraint/Table is causing you the trouble?