COLLECT into table of VARCHAR2 giving ORA-22814 error

Question

Hello,
I am trying to collect a VARCHAR2(5 CHAR) column into a table type of VARCHAR2(5 CHAR) but it gives me the ORA-22814: attribute or element value is larger than specified in type.
Even if I cast my string to this data type.
SQL> CREATE OR REPLACE TYPE T_VARCHAR2_5_TAB AS TABLE OF VARCHAR2(5 CHAR);
  2  /
Type created.
SQL>
SQL> DESC site_section_cours;
Name                                      Null?    Type
SEQ_SITE_COURS                            NOT NULL NUMBER
CODE_SESSION                              NOT NULL VARCHAR2(6 CHAR)
NUMERO_REFERENCE_SECTION_COURS            NOT NULL VARCHAR2(5 CHAR)
CODE_STATUT_PUBLICATION_PDF               NOT NULL VARCHAR2(2 CHAR)
CONTROLE_MODIFICATION                     NOT NULL NUMBER
SEQ_BAREME_NOTES                                   NUMBER
SQL>
SQL> SELECT CAST(
  2              COLLECT(
  3              sisc.numero_reference_section_cours
  4              ORDER BY sisc.code_session, sisc.numero_reference_section_cours
  5              )
  6              AS t_varchar2_5_tab
  7           ) AS lov
  8  FROM   site_section_cours sisc;
          COLLECT(
ERROR at line 2:
ORA-22814: attribute or element value is larger than specified in type
SQL>
SQL> SELECT CAST(
  2              COLLECT(
  3              CAST(
  4                sisc.numero_reference_section_cours AS VARCHAR2 (5 CHAR)
  5              )
  6              ORDER BY sisc.code_session, sisc.numero_reference_section_cours
  7              )
  8              AS t_varchar2_5_tab
  9           ) AS lov
10  FROM   site_section_cours sisc;
          COLLECT(
ERROR at line 2:
ORA-22814: attribute or element value is larger than specified in type What am I missing?
Thanks
Bruno

Answer 1

A new test: try to collect into 10 and 20 char table type.
Not working with 10 but working with 20.
SQL> SELECT CAST(
  2              COLLECT(
  3              sisc.numero_reference_section_cours
  4              ORDER BY sisc.code_session, sisc.numero_reference_section_cours
  5              )
  6              AS t_varchar2_10_tab
  7           ) AS lov
  8  FROM   site_section_cours sisc;
          COLLECT(
ERROR at line 2:
ORA-22814: attribute or element value is larger than specified in type
SQL>
SQL> SELECT CAST(
  2              COLLECT(
  3              sisc.numero_reference_section_cours
  4              ORDER BY sisc.code_session, sisc.numero_reference_section_cours
  5              )
  6              AS t_varchar2_20_tab
  7           ) AS lov
  8  FROM   site_section_cours sisc;
LOV                                                                            
T_VARCHAR2_20_TAB('10001', '10003', '10004', '10016', '10018', '10019', '10020',
'10022', '10025', '10028', '10029', '10030', '10031', '10032', '10039', '10040'
, '10041', '10003', '21000', '21001', '21002', '21004', '21005', '21006', '21007
', '21008', '21009', '21010', '82001', '11972', '11986', '10018', '10019')      Bruno