RE: dba_extents and dba_segments

On my little test database the issues seems to be that dba_segments
shows segments in the recycle bin (BIN$ segment names) but dba_extents
doesn't.  This little test just shows for table type segments which were
the one segment type with the most difference in my database. 

 

Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production

With the Partitioning, OLAP and Data Mining options

 

SQL> select segment_name, sum(bytes) from dba_segments

  2  where segment_type='TABLE' group by segment_name

  3  minus

  4  select segment_name, sum(bytes) from dba_extents

  5  where segment_type='TABLE' group by segment_name

  6  /

 

SEGMENT_NAME
SUM(BYTES)

------------------------------------------------------------------------
--------- ---------------

BIN$/3CMRcOqT02P1xIJLb19Ng==$0
65536

BIN$/Xwbg4BFT1y9TIkhXUZd5Q==$0
65536

BIN$2sKa4lyTSE6apkmjIa7x8w==$0
65536

BIN$6RYZ9onvR523E6fhLcyeGg==$0
65536

BIN$ATwCYw1hQY660ges9Ryvqg==$0
65536

 

<more rows here>

 

 

-----------------------

Ric Van Dyke

Hotsos Enterprises

-----------------------

-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of
genegurevich@xxxxxxxxxxxxxxxxxxxxx
Sent: Wednesday, May 09, 2007 4:34 PM
To: oracle-l@xxxxxxxxxxxxx
Subject: dba_extents and dba_segments

 

Hi all:

 

I am very confused by the following 2 SQLs which I have ran against
oracle

10.2.0.3. I have been under impression

that dba_Extents is a rollup of the dba_extents and therefore these two

SQLs should return the same results.

This however does not seem to be the case.  Does anyone know what is the

reason for this?

 

SQL> select sum(bytes/1024)/1024 from dba_extents where tablespace_name
=

'CCS_X_017';

 

 

SUM(BYTES/1024)/1024

--------------------

               22200

 

  1* select sum(bytes/1024)/1024 from dba_segments where tablespace_name
=

'CCS_X_017'

SQL> /

 

SUM(BYTES/1024)/1024

--------------------

                2400

 

thank you

 

Gene Gurevich

 

 

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