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317: BEGIN
318:
319: SELECT instr(p_ponum, '-', -1)
320: INTO position
321: FROM dual;
322:
323: if position = 0 then
324: return p_ponum;
325: end if;
335: rel_num varchar2(500);
336: BEGIN
337:
338: select instr(p_ponum, '-', -1) into position
339: from dual;
340:
341: if position = 0 then
342: return null;
343: end if;