Strage behavior on renaming an IOT table - oracle 11g - 11.2.0.2.0 "truncating (as requested) before column"

I have created a heap table,
then an IOT with CTAS from above table
and then altered the IOT to rename it.

as soon as i ran a select on dba_tables, i noticed the Truncating commands and was little scared.
Since the issue is not reproducible, didn't open any SR with Oracle and still wonder why that strange output was shown. If anybody noticed the similar behavior and got the reason, please let me know.


19:56:51 SQL> conn raj/***
Connected.
19:56:54 SQL> CREATE TABLE test123
19:56:55   2     ( asd    NUMBER(6)
19:56:55   3     , first_name     VARCHAR2(20)
19:56:55   4     , CONSTRAINT     test123_pk
19:56:55   5                      PRIMARY KEY (asd)
19:56:55   6     );

Table created.

Elapsed: 00:00:00.60

19:57:09 SQL> create table test321 (asd, first_name,
19:57:09   2  constraint new_pk
19:57:09   3  primary key (asd))
19:57:09   4  organization index
19:57:09   5  as select * from test123;

Table created.

Elapsed: 00:00:00.03
19:57:49 SQL>
19:57:54 SQL> alter table test321 rename to testraj;

Table altered.

Elapsed: 00:00:00.96
19:59:31 SQL> select * from dba_tables where table_name ='TESTRAJ';
truncating (as requested) before column MAX_TRANS

truncating (as requested) before column INITIAL_EXTENT

truncating (as requested) before column NEXT_EXTENT

truncating (as requested) before column MIN_EXTENTS

truncating (as requested) before column MAX_EXTENTS

truncating (as requested) before column PCT_INCREASE

truncating (as requested) before column FREELISTS

truncating (as requested) before column FREELIST_GROUPS

truncating (as requested) before column NUM_ROWS

truncating (as requested) before column BLOCKS

truncating (as requested) before column EMPTY_BLOCKS

truncating (as requested) before column AVG_SPACE

truncating (as requested) before column CHAIN_CNT

truncating (as requested) before column AVG_ROW_LEN

truncating (as requested) before column AVG_SPACE_FREELIST_BLOCKS

truncating (as requested) before column NUM_FREELIST_BLOCKS

rows will be truncated

rows will be truncated

rows will be truncated

rows will be truncated

rows will be truncated

rows will be truncated

rows will be truncated

rows will be truncated

rows will be truncated

rows will be truncated

rows will be truncated

rows will be truncated

rows will be truncated

rows will be truncated

rows will be truncated

rows will be truncated

rows will be truncated

rows will be truncated

rows will be truncated

rows will be truncated

rows will be truncated

rows will be truncated

rows will be truncated

rows will be truncated

rows will be truncated

rows will be truncated

rows will be truncated


OWNER      TABLE_NAME                     TABLESPACE_NAME CLUSTER_NAME                   IOT_NAME                       STATUS               PCT_FREE             PCT_USED            INI_TRANS LOG B D
---------- ------------------------------ --------------- ------------------------------ ------------------------------ -------- -------------------- -------------------- -------------------- --- - -
RAJ        TESTRAJ                                                                                                      VALID                       0                    0                    0     N

Elapsed: 00:00:00.36
20:00:25 SQL>