Windows System Environment Variables in "Sql * plus"

Question

Can i use/reference Windows System Environment variables in "Sql * plus"?
For example, i want to create sql-script to run in database server computer that asks variable "ORA_HOME" and uses this value to execute some sql/plsql sentences.
Oracle 10g Personal, Windows 7.
Edited by: CharlesRoos on 12.11.2010 17:28

Answer 1

CharlesRoos wrote:
Business problem:
I have created 2 databases in my computer. Both databases needs tablespaces created by a script. Tablespaces' datafiles (.dbf files) names are same for both database. Both database has it's own directory where it holds datafiles at the moment. At the moment the datafiles for Database1 are in folder something like "%ORACLE_HOME%"\oradata\%databasename1%\*.dbf, and second database has its datafiles in other folder, somewhere ""%ORACLE_HOME%"\oradata\%databasename1%\*.dbf". I want now the script to create tablespace called "INDX" with same datafile name "indx1.dbf" into both database. So into both mentioned folder the file "indx1.dbf" must be created by script. I think the script should do following:
1. get ORACLE_HOME.
2. connect to database "databasename1"
3. EXECUTE IMMEDIATE "Create TableSpace INDX....file=%ORACLE_HOME% || databasename1 || indx1.dbf"
4. connect to database "databasename2"
5. EXECUTE IMMEDIATE "Create TableSpace INDX....file=%ORACLE_HOME% || databasename2 || indx1.dbf"I don't have Oracle database near by anymore, so the code was pseudocode.
I don't understand how to use ?-shortcut.OK, my first impression is "why does this even NEED to be scripted? Creation of new tablespaces is usually a one-off operation.
But that aside how about this sqlplus command-line substitution variables. This example is in linux, but will work as well in Windows with the change of the way environment variables are referenced:
*nix - echo $myvariable
Windows - echo %myvariable%
First, the sqlscript to create the TS. Note the use of the substitution variable "&1"
{code}
[oracle@vmlnx01 ~]$ cat cat makets.sql
set echo on feedback on verify on trimsp on
prompt &1
CREATE SMALLFILE TABLESPACE EDSTEST
DATAFILE '/ora01/oradata/&1/edstest.dbf'
SIZE 5M
REUSE
AUTOEXTEND ON
NEXT 1280K
MAXSIZE 32767M
LOGGING
EXTENT MANAGEMENT LOCAL
SEGMENT SPACE MANAGEMENT AUTO
drop tablespace edstest
including contents and datafiles
exit
{code}
So, at the OS prompt: Notice that the @ is separated by a space, makeing it a command line parm instead of part of the connect string
{code}
[oracle@vmlnx01 ~]$ export myparm=vlnxora1
[oracle@vmlnx01 ~]$ sqlplus system/pswd @makets $myparm
SQL*Plus: Release 10.2.0.4.0 - Production on Fri Nov 12 13:18:05 2010
Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> prompt &1
vlnxora1
SQL> --
SQL> CREATE SMALLFILE TABLESPACE EDSTEST
2 DATAFILE '/ora01/oradata/&1/edstest.dbf'
3 SIZE 5M
4 REUSE
5 AUTOEXTEND ON
6 NEXT 1280K
7 MAXSIZE 32767M
8 LOGGING
9 EXTENT MANAGEMENT LOCAL
10 SEGMENT SPACE MANAGEMENT AUTO
11 ;
old 2: DATAFILE '/ora01/oradata/&1/edstest.dbf'
new 2: DATAFILE '/ora01/oradata/vlnxora1/edstest.dbf'
Tablespace created.
SQL> --
SQL> drop tablespace edstest
2 including contents and datafiles
3 ;
Tablespace dropped.
SQL> exit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
[oracle@vmlnx01 ~]$
{code}