ORA-12714 when using inline view in PL/SQL

Question

Oracle 9.2.0.4 on Solaris8(SPARC 64).
I have stripped and simplify the code:
create type parent_type as object (parent_col number(10)) not instantiable not final;
create type sub_type under parent_type (child_col nvarchar2(30));
create table test (table_col parent_type);
SQL statement works:
SELECT a
FROM
(select treat(table_col as sub_type).child_col a
from test)
...but the sam statement in PL/SQL returns:
DECLARE temp_var NVARCHAR2(30);
BEGIN
SELECT a
INTO temp_var
FROM
(select treat(table_col as sub_type).child_col a
from test);
end;
ERROR at line 3:
ORA-06550: line 3, column 8:
PL/SQL: ORA-12714: invalid national character set specified
ORA-06550: line 3, column 1:
PL/SQL: SQL Statement ignored
SQL> run
1* select parameter,value from v$nls_parameters where parameter like '%CHARACTERSET%'
PARAMETER VALUE
NLS_CHARACTERSET EE8ISO8859P2
NLS_NCHAR_CHARACTERSET AL16UTF16
Where do I specify national character set ?
NLS_LANG=SLOVENIAN_SLOVENIA.EE8ISO8859P2
ORA_NLS33 is unset (it makes no diference if I set it manually).
Can anyone reproduce error ?

Answer 1

I get the error even on 10g. The value for NLS_LANG is:
AMERICAN_AMERICA.WE8MSWIN1252
SQL> create type parent_type as object (parent_col number(10)) not instantiable not final;
  2  /
Type created.
SQL> create type sub_type under parent_type (child_col nvarchar2(30));
  2  /
Type created.
SQL> create table test (table_col parent_type);
Table created.
SQL> SELECT a
  2  FROM
  3  (select treat(table_col as sub_type).child_col a
  4  from test)
  5  /
no rows selected
SQL> DECLARE temp_var NVARCHAR2(30);
  2  BEGIN
  3  SELECT a
  4  INTO temp_var
  5  FROM
  6  (select treat(table_col as sub_type).child_col a
  7  from test);
  8  end;
  9  /
SELECT a
ERROR at line 3:
ORA-06550: line 3, column 8:
PL/SQL: ORA-12714: invalid national character set specified
ORA-06550: line 3, column 1:
PL/SQL: SQL Statement ignored
SQL> select * from nls_database_parameters
  2  where parameter like '%CHARACTERSET';
PARAMETER                      VALUE
NLS_CHARACTERSET               WE8ISO8859P15
NLS_NCHAR_CHARACTERSET         AL16UTF16
SQL> select * from v$version;
BANNER
Oracle9i Enterprise Edition Release 9.2.0.3.0 - 64bit Production
PL/SQL Release 9.2.0.3.0 - Production
CORE    9.2.0.3.0       Production
TNS for Solaris: Version 9.2.0.3.0 - Production
NLSRTL Version 9.2.0.3.0 - Production
SQL> disconnect
Disconnected from Oracle9i Enterprise Edition Release 9.2.0.3.0 - 64bit Production
With the Partitioning option
JServer Release 9.2.0.3.0 - Production
SQL> create type parent_type as object (parent_col number(10)) not instantiable not final;
  2  /
Type created.
SQL> create type sub_type under parent_type (child_col nvarchar2(30));
  2  /
Type created.
SQL> create table test (table_col parent_type);
Table created.
SQL> SELECT a
  2  FROM
  3  (select treat(table_col as sub_type).child_col a
  4  from test)
  5  /
no rows selected
SQL> DECLARE temp_var NVARCHAR2(30);
  2  BEGIN
  3  SELECT a
  4  INTO temp_var
  5  FROM
  6  (select treat(table_col as sub_type).child_col a
  7  from test);
  8  end;
  9  /
SELECT a
ERROR at line 3:
ORA-06550: line 3, column 8:
PL/SQL: ORA-12714: invalid national character set specified
ORA-06550: line 3, column 1:
PL/SQL: SQL Statement ignored
SQL> select * from v$version;
BANNER
Oracle Database 10g Enterprise Edition Release 10.1.0.2.0 - 64bi
PL/SQL Release 10.1.0.2.0 - Production
CORE    10.1.0.2.0      Production
TNS for Solaris: Version 10.1.0.2.0 - Production
NLSRTL Version 10.1.0.2.0 - Production
SQL> select * from nls_database_parameters
  2  where parameter like '%CHARACTERSET';
PARAMETER                      VALUE
NLS_CHARACTERSET               WE8ISO8859P15
NLS_NCHAR_CHARACTERSET         AL16UTF16
SQL> disconnect
Disconnected from Oracle Database 10g Enterprise Edition Release 10.1.0.2.0 - 64bit Production
With the Partitioning, Oracle Label Security, OLAP and Data Mining options
SQL>