RE: Table with data but not segment
Date: Fri, 30 Jan 2009 12:14:23 -0500
Also EXTERNAL tables appear in dba_tables but have no segment though the only EXTERNAL table defined on the system I checked does have tablespace_name value of SYSTEM instead of null like I expected.
- Mark D Powell --
Phone (313) 592-5148
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Nigel Thomas
Sent: Friday, January 30, 2009 11:51 AM To: ORACLE-L Subject: Re: Table with data but not segment Copy to list 2009/1/30 Nigel Thomas <nigel.cl.thomas_at_googlemail.com> A table with no rows is still a table, so it has to bestored somewhere.
One or more tables in a heap cluster would not have their own segments (eg SYS.USER$ is stored in cluster C_USER# along with SYS.TSQ$). Unless the cluster name is the same as (one of) the table(s).
A partitioned table has no segment (the partitions each have a segment). Of course one of the partition names may be the same as the table name (eg see SYS.LOGMNR_IND$ in the XE install).
I would like to clarify or confirm. I can query
user_indexes) minus user_segments and see about 4 tables and 9 indexes.
7 turn out to be normal and 2 are IOT - TOP indexes.
I guess the 3 tables with 0 rows and all the indexes that go with them
might not have a segment?
There is one table with and IOT - TOP index with 100000 rows. Two
indexes go with this table, one of them is IOT - TOP, the other normal.
Even and Index has a segment, why would I not have a segment for
this(ese) table(s) or Indexes?Received on Fri Jan 30 2009 - 11:14:23 CST