Ora-01489: result of string concatenation is too long

Question

Hello Gurus,
i have a typical problem
i am constructing a query in FORM and writing SQLPLUS script into a .SQL file. file will contain final data like below..
set linesize 90
set pagesize 0
set echo off
set verify off
set termout off
set feedback off
set trimspool on
set escape '^'
spool D:\10GAPPServerappln\xxx\TEMPREP\ADA39057.sql;
set linesize 229
select ' IQIS# ,Cust Complaint Short Txt ,CD Short Txt ' from dual;
set linesize 129
select a||','||b||','||c||d from table;
spool off;
exit;
After this By using HOST command i will execute the above .sql script and will write the output to text file.
But problem is when i have clob column in any one of concatenated columns in query (a or b or c) then i am getting the error "Ora-01489: result of string concatenation is too long".
pls suggest me how to overcome this problem..

Answer 1

sybrand_b wrote:
Obviously the || operator is concatenating strings, your CLOB is implicitly converted to a VARCHAR2, which has a 4000 bytes limit.???
From non-experts who did read documentation:
CLOB || VARCHAR2 = CLOB:
SQL> CREATE OR REPLACE
  2  VIEW V1
  3  AS SELECT TO_CLOB('A') || 'A' clob_concat_varchar2 FROM dual
  4  /
View created.
SQL> DESC V1
Name                                      Null?    Type
CLOB_CONCAT_VARCHAR2                               CLOB
SQL> SY.