Truncate table in Oracle getting errors

Question

I got the problem is when I run following command in Oracle, I encounter the error.

Truncate table mytable;

Errors:

Answer 1

I had the similar issue and I sorted it out by the following scripts.

begin
for i in (select constraint_name, table_name from user_constraints a where a.owner='OWNER' and a.table_name not in
(select b.table_name from user_constraints b where b.table_name like '%BIN%') 
  and  a.constraint_type not in 'P')
LOOP
  execute immediate 'alter table '||i.table_name||' disable constraint '||i.constraint_name||'';
end loop;
end;
/

truncate table TABLE_1;
truncate table TABLE_2;


begin
for i in (select constraint_name, table_name from user_constraints a where a.owner='OWNER' and a.table_name not in
(select b.table_name from user_constraints b where b.table_name like '%BIN%') 
  and  a.constraint_type not in 'P')
LOOP
  execute immediate 'alter table '||i.table_name||' enable constraint '||i.constraint_name||'';
end loop;
end;
/

This script will first disable all the Constraints. Truncates the data in the tables and then enable the contraints.

Hope it helps.

cheers..