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autoextend query

Posted on 2014-02-12
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Last Modified: 2014-02-18
is it possible to run a query to list autoextend settings for all tables spaces in an oracle database?
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Question by:pma111
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slightwv (䄆 Netminder) earned 250 total points
ID: 39853272
Yes.

Look at FILE_NAME, AUTOEXTENSIBLE and INCREMENT_BY in DBA_DATA_FILES.
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by:pma111
ID: 39853284
is dba_data_files specific to tablespaces, or does it list information on other things above and beyond tables spaces. or is it a tidy view 1 row per tablespace?
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Expert Comment

by:slightwv (䄆 Netminder)
ID: 39853300
Tablespaces do not autoextend.  Only data files do.

A tablespace can have one to many datafiles.

A datafile belongs to one and only one tablesapce.
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Author Comment

by:pma111
ID: 39853302
is there also anywhere to see a list of all default oracle tablespaces that would be evident in every database?
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by:pma111
ID: 39853306
in which case is there anywhere to tie up datafiles and tablespaces, to see which datafiles are in which tablespace?
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Expert Comment

by:slightwv (䄆 Netminder)
ID: 39853328
>>is there also anywhere to see a list of all default oracle tablespaces

The only real 'DEFAULT' tablespace is SYSTEM and I'm not 100% sure you cannot rename that one when creating a database.  There are some  sort of standard ones in the templates but they are up to the DBA that creates them.

You can see ALL tablespaces in, guess which view?  DBA_TABLESPACES.

Oracle is pretty good about naming the views.

Three levels:  USER_, ALL_ and DBA_ then the object you are looking for.

Differences:  USER is objects the USER owns.  ALL, the objects the user has permission to see, DBA everything in the database.

Looking for say, INDEXES?  DBA_INDEXES.

>>to see which datafiles are in which tablespace?

dba_data_files also has a TABLESPACE_NAME.
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Assisted Solution

by:David
David earned 250 total points
ID: 39853337
Depending upon the scripts used to install the database, there could be additional non-default tablespaces at creation time, but try:

select t.name, min(creation_time) creation
from v$datafile d, v$tablespace t where d.ts#=t.ts#
group by t.name
order by 2
/

Your results should resemble:

NAME                           CREATION
------------------------------ ---------
SYSTEM                         06-JUL-12
SYSAUX                         06-JUL-12
UNDOTBS1                       06-JUL-12
USERS                          06-JUL-12
RMAN                           06-JUL-12
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Expert Comment

by:slightwv (䄆 Netminder)
ID: 39853341
>>v$datafile d, v$tablespace t

I suggest using the views based on the USER/ALL/DBA labels over the V$ views for static objects.  The V$ views can be confusing.
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Author Comment

by:pma111
ID: 39853353
dvz, yes those are the ones listed...
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Expert Comment

by:David
ID: 39853386
That particular question is answered, then.  Does that help or are we missing your intent?
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