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listagg is a function introduced in Oracle 11.2! now this function is bugging us allot, we are migrating from MySQL to Oracle and we have this query: SELECT p_id, MAX(registered) AS registered, listagg(MESSAGE, ' ') within GROUP (ORDER BY registered) AS MESSAGE FROM umm_parent_id_remarks_v m GROUP BY m.p_id; is works fine in MySQL as far as we know what bugging us is under Oracle it returns VARCAR and not CLOB as we need! the text is huge and we do need it to be CLOB ! here is what I tried to do! create a CLOB_T table of CLOB Type! then create the function create or replace function listaggclob (t in clob_t) return clob as ret clob := ''; i number; begin i := t.first; while i is not null loop if ret is not null then ret := ret || ' '; end if; ret := ret || t(i); i := t.next(i); end loop; return ret; end; now if I run it: SELECT p_id, MAX(registered) AS registered, listaggclob(cast(collect (MESSAGE) as clob_t)) MESSAGE FROM umm_parent_id_remarks_v m GROUP BY m.p_id; I get ORA-22814: attribute or element value is larger than specified in type is there any solution for it? thanks you

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