1.禁用主外键
BEGIN
for c in (select ‘ALTER TABLE ‘||TABLE_NAME||‘ DISABLE CONSTRAINT ‘||constraint_name||‘ ‘ as v_sql from user_constraints where CONSTRAINT_TYPE=‘R‘) loop
EXECUTE IMMEDIATE c.v_sql;
end loop;
end;
2.清空数据源。清空所有数据。一般情况是对表进行条件删除。
begin
for ec in
(select table_name from user_tables)
loop
execute immediate ‘delete ‘|| ec.table_name;
end loop;
end;
commit;
3.启动主外键：
BEGIN
for c in (select ‘ALTER TABLE ‘||TABLE_NAME||‘ ENABLE CONSTRAINT ‘||constraint_name||‘ ‘ as v_sql from user_constraints where CONSTRAINT_TYPE=‘R‘) loop
EXECUTE IMMEDIATE c.v_sql;
end loop;
end;
4.启动失败，有时候因为删除了父级数据而子级没删，看数据库报错信息，一步一步往下找，从下到上把子数据删除。
5.再次启动主外键。