How to disable all constraints on a table

Question

Hi ,
I want to disable all constraints on a table
select 'ALTER TABLE '||substr(c.table_name,1,35)||
' DISABLE CONSTRAINT '||constraint_name||' ;'
from user_constraints c
where c.table_name = MY_table;
thanks in advance

Answer 1

What is wrong with query you have?
Why do you have substr around the table name?
If you want to execute the output as well, do this,
SET SERVEROUT ON
BEGIN
   FOR i IN (SELECT 'ALTER TABLE ' || c.table_name || ' DISABLE CONSTRAINT ' || constraint_name AS l_sql, table_name, constraint_name
               FROM user_constraints c
              WHERE c.table_name = my_table_name)
   LOOP
      EXECUTE IMMEDIATE i.l_sql;
      DBMS_OUTPUT.PUT_LINE ('Disabled constraint ' || i.constraint_name || ' on table ' || i.table_name);
   END LOOP;
END;
/