create or replace function t1 return number is v_exists number(5):=0; begin select 1 into v_exists from dual where 1 = 0; return v_exists; --exception -- when others then -- v_exists := '999'; -- return 999; end t1; / select t1 from dual; Expected: ORA-01403: no data found Actual: fraud_owner@E2E811> select t1 from dual 2 / T1 ---------- fraud_owner@E2E811> IMPORTANT: The contents of this email and any attachments are confidential and proprietary to ECtel Ltd. They are intended for the named recipient(s) only. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, use, distribution or copying of this communication is strictly prohibited and may be unlawful. If you have received this email in error, please notify us immediately by replying to the message and deleting it from your computer.