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Get Default Datafile directory [message #348048]

Mon, 15 September 2008 08:43

Lewis99
Messages: 4
Registered: September 2008

Junior Member

Is there a way to get the default datafile directory from the dictionary views in Oracle? I can't find it anywhere in the Parameters table.

E.g. create tablespace XXXXX datafile 'XXXXX.dbf'

If you create a datafile in the manner shown above, Oracle puts it in the ..\server\database folder, wherever that may be. How can I get this from the database or perhaps the registry without having to hardcode part of the path?

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Re: Get Default Datafile directory [message #348059 is a reply to message #348048]

Mon, 15 September 2008 09:01

Michel Cadot
Messages: 68732
Registered: March 2007
Location: Saint-Maur, France, https...

Senior Member
Account Moderator

show parameter db_create_file_dest (or query v$system_parameter).
If not set it is in %ORACLE_HOME%\database and it depends of the instance and so is not a database parameter.

Regards
Michel

Regards
Michel

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Re: Get Default Datafile directory [message #348072 is a reply to message #348059]

Mon, 15 September 2008 09:41

Lewis99
Messages: 4
Registered: September 2008

Junior Member

Thanks Michel.

So I take it that if db_create_file_dest is not set then there is no way that anybody can change the default %ORACLE_HOME%\database folder (i.e. this is hard-coded into the app.). I need to know that this is 100% safe as I intend to delete a datafile from there programatically (from an installer), if I can't find a given database and user in the db.

Thanks very much for your help.

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Re: Get Default Datafile directory [message #348074 is a reply to message #348048]

Mon, 15 September 2008 09:47

BlackSwan
Messages: 26766
Registered: January 2009
Location: SoCal

Senior Member

You can always provide a fully qualifier path name to place the file anywhere you desire.

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Re: Get Default Datafile directory [message #348081 is a reply to message #348074]

Mon, 15 September 2008 10:17

Lewis99
Messages: 4
Registered: September 2008

Junior Member

That is true, but in this case the installer will always create the tablespace without a fully qualified path. As long as I can guarantee that the subfolder (\database) will always be the same I can use the path to check for the existance of the file and remove it (as long as it has been dropped from the db).

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Re: Get Default Datafile directory [message #348082 is a reply to message #348081]

Mon, 15 September 2008 10:25

Michel Cadot
Messages: 68732
Registered: March 2007
Location: Saint-Maur, France, https...

Senior Member
Account Moderator

Quote:

but in this case the installer will always create the tablespace without a fully qualified path.

This is wrong, if you give a fully qualified name then the datafile is fully qualified in the dictionary.

Quote:

As long as I can guarantee that the subfolder (\database) will always be the same

You can't.

Regards
Michel

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Re: Get Default Datafile directory [message #348083 is a reply to message #348082]

Mon, 15 September 2008 10:27

Lewis99
Messages: 4
Registered: September 2008

Junior Member

OK, thanks guys. I won't try to deal with the datafile that is created - I'll leave that as a manual step outside the installer.

Many thanks for your help.

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Re: Get Default Datafile directory [message #348093 is a reply to message #348083]

Mon, 15 September 2008 10:47

Michel Cadot
Messages: 68732
Registered: March 2007
Location: Saint-Maur, France, https...

Senior Member
Account Moderator

You can rename the file that have already been created to add the directory.

ALTER DATABASE RENAME FILE

Regards
Michel

[Updated on: Mon, 15 September 2008 10:51]

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