Pass tablespace(s) as a parameter to RMAN using batch file (windows2000)

Question

I want to make a backup of one or more than one tablespaces.
For Example:
Backup tablespace USERS,TOOLS;
Backup tablespace USERS;
In this regards I am using windows batch file. Below you find the code of batch file which I am using to perform this operation (windows 2000)
Batch file (c:\rman.cmd)
set tbs1=%1
set tbs2=,%2
if exist tbs1 == goto usage
if exist tbs2 == goto usage
echo BACKUP tablespace %tbs1% %tbs2% ; > c:\temp\tbs.rman
rman TARGET / @ c:\temp\tbs.rman
Problem
I run this batch file on command line .
When I issue this command its ok and backed up both the tablespaces.
Host @c:\rman.cmd USERS,TOOLS
But when I want to backup only one tablespace and issue the command like that:
Host @c:\rman.cmd USERS
It gave the following error
BACKUP tablespace users , ;
Found comma after first tablespace.
Point of focus
How to get rid of the comma after first tablespace on run time, when I want to backup only one tablespace.
BACKUP tablespace users , ;
How to avoid that comma on run time when I only want to make a backup of single tablespace.
Please check this matter it is only the batch file side problem.
With Best Regards
Fawad Ahmed

Answer 1

I am not expert is DOS but I think you can fix this with
a simple programming logic elements in the script.
You have 2 cases:
1 case ) When you have only one parameter
2 case ) When you have more or equal than two parameters
if exist tbs1 == goto mark1
if exist tbs2 == goto mark2
mark2:
echo BACKUP tablespace %tbs1% %tbs2% ; > c:\temp\tbs.rman
goto end
mark1:
echo BACKUP tablespace %tbs1% ; > c:\temp\tbs.rman
goto end
end:
rman TARGET / @ c:\temp\tbs.rman
This can be one the case for 1 or 2 parameters . If
you think to pass more parameters you have to use
another logic.
I hope this can help you!
Joel P�rez