IOT without overflow treats differently char/varchar2

Question

Hi,
test case with 8k block size:
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, Automatic Storage Management and Data Mining options
SQL>
     create table test1 (x number primary key, y char(2000)) ORGANIZATION INDEX;
Table created.
SQL>
     create table test2 (x number primary key, y varchar2(2000)) ORGANIZATION INDEX;
create table test2 (x number primary key, y varchar2(2000)) ORGANIZATION INDEX
ERROR at line 1:
ORA-01429: Index-Organized Table: no data segment to store overflow row-pieces
SQL>
     create table test2 (x number primary key, y varchar2(1000)) ORGANIZATION INDEX;
create table test2 (x number primary key, y varchar2(1000)) ORGANIZATION INDEX
ERROR at line 1:
ORA-01429: Index-Organized Table: no data segment to store overflow row-pieces
SQL>
     create table test2 (x number primary key, y varchar2(500)) ORGANIZATION INDEX;
Table created.why does it fail with varchar2 but not with char?
Thanks,
Joaquin Gonzalez
Edited by: user4070490 on 10-feb-2011 23:41
Maybe it is something different with characterset used for char and varchar:
     select * from V$NLS_PARAMETERS;
PARAMETER               VALUE
NLS_LANGUAGE            AMERICAN
NLS_TERRITORY           SPAIN
NLS_CURRENCY            €
NLS_ISO_CURRENCY        SPAIN
NLS_NUMERIC_CHARACTERS  ,.
NLS_CALENDAR            GREGORIAN
NLS_DATE_FORMAT         dd/mm/yyyy hh24:mi:ss
NLS_DATE_LANGUAGE       AMERICAN
NLS_CHARACTERSET        AL32UTF8
NLS_SORT                BINARY
NLS_TIME_FORMAT         HH24:MI:SSXFF
NLS_TIMESTAMP_FORMAT    DD/MM/YYYY HH24:MI:SS.FF3
NLS_TIME_TZ_FORMAT      HH24:MI:SSXFF TZR
NLS_TIMESTAMP_TZ_FORMAT DD/MM/RR HH24:MI:SSXFF TZR
NLS_DUAL_CURRENCY       €
NLS_NCHAR_CHARACTERSET  AL16UTF16
NLS_COMP                BINARY
NLS_LENGTH_SEMANTICS    CHAR
NLS_NCHAR_CONV_EXCP     FALSEddl after creation is:
CREATE TABLE "EXPLOTACION"."TEST1"
  (    "X" NUMBER,
       "Y" CHAR(2000 CHAR),
        PRIMARY KEY ("X") ENABLE
  ) ORGANIZATION INDEX NOCOMPRESS PCTFREE 10 INITRANS 2 MAXTRANS 255 NOLOGGING
TABLESPACE "EXPLOTACION"
PCTTHRESHOLD 50;
CREATE TABLE "EXPLOTACION"."TEST2"
  (    "X" NUMBER,
       "Y" VARCHAR2(500 CHAR),
        PRIMARY KEY ("X") ENABLE
  ) ORGANIZATION INDEX NOCOMPRESS PCTFREE 10 INITRANS 2 MAXTRANS 255 NOLOGGING
TABLESPACE "EXPLOTACION"
PCTTHRESHOLD 50;

Answer 1

its about size of colunm not datatype
SQL>/
create table test4 (x number primary key, y char(4000)) ORGANIZATION INDEX;
ERROR at line 1:
ORA-00910: specified length too long for its datatype
Elapsed: 00:00:00.56
SQL>create table test4 (x number primary key, y char(400)) ORGANIZATION INDEX;
Table created.
Elapsed: 00:00:00.28
SQL>