Question of missing Tablespace

Hi all

I was wondering if anyone had any suggestions.  I have what seems to be a missing tablespace however the data files that are associated with the storage space are still on my server.  When I ask the Oracle database to show all my storage space, my tablespace is not listed.  However when I look at the data files they are still being changed or at least seem to be changed because they have a current date and time.

I tried to mount the database and run the following "ALTER DATABASE DATAFILE ' / oracle_data/hdbt1.ora ' ONLINE" and then open the database and querying tablespaces again to see if it showed up and he did not.  I don't get any errors or anything missing data files.  Any suggestions?

cfa0f171-30D1-43b0-91f8-a060021e79ad wrote:

In the past the above query would tell me whether my tablespace was full.

No, it wouldn't since you do not have an outer join between DBA_DATA_FILES and DBA_FREE_SPACE.  Without the outer join unmatched records will NOT be displayed, so if a tablespace becomes FULL, it has been missing since this 'report '.  Look at the output of your query when a tablespace can exist without free space:

SQL> select d.tablespace_name,
  2  d.total/1048576 "Total (MB)",
  3  round(f.free/1048576,2) "Free",
  4  round(f.free/d.total*100,2) "% Free"
  5  from
  6  (select tablespace_name,
  7  round(sum(bytes)) free
  8  from dba_free_space
  9  group by tablespace_name) f,
 10  (select tablespace_name, sum(bytes) total
 11  from dba_data_files
 12  group by tablespace_name) d
 13  WHERE d.tablespace_name =
 14  f.tablespace_name
 15  order by 1;

TABLESPACE_NAME                Total (MB)       Free     % Free
------------------------------ ---------- ---------- ----------
INDX                                   50         49         98
SYSAUX                                810        203      25.06
SYSTEM                                740       8.56       1.16
UNDOTBS1                             5695    5434.75      95.43
USERS                            14231.25   13884.56      97.56
USERS2                                199        198       99.5

6 rows selected.

Now look which gives you an outer join:

SQL> select d.tablespace_name,
  2  d.total/1048576 "Total (MB)",
  3  round(nvl(f.free, 0)/1048576,2) "Free",
  4  round(nvl(f.free, 0)/d.total*100,2) "% Free"
  5  from
  6  (select tablespace_name,
  7  round(sum(bytes),0) free
  8  from dba_free_space
  9  group by tablespace_name) f right outer join
 10  (select tablespace_name, sum(bytes) total
 11  from dba_data_files
 12  group by tablespace_name) d on d.tablespace_name = f.tablespace_name
 13  order by 1;

TABLESPACE_NAME                Total (MB)       Free     % Free
------------------------------ ---------- ---------- ----------
INDX                                   50         49         98
SYSAUX                                810        203      25.06
SYSTEM                                740       8.56       1.16
UNDOTBS1                             5695    5434.75      95.43
USERS                            14231.25   13884.56      97.56
USERS2                                199        198       99.5
YUPA                                    1          0          0

7 rows selected.

SQL>

This is the query that you want to show you tablespace free space even when there is none.

David Fitzjarrell

Tags: Database

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