How to connect to Oracle as “SYS” from SQL*Plus in

Question

I want to connect to Oracle as SYS from SQL*Plus in Java. But I am not able to connect. But I am able to connect as user named SCOTT. My code snippet is as follows:

public static void test_script () {  

        String fileName = "@t.sql";  
        //t.sql contains "show user" command
        String sqlPath = "D:\\";  

        String sqlCmd = "sqlplus";  
       // String arg1   = "scott/tiger@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(Host=hostname)(Port=PORT ID))(CONNECT_DATA=(SID=SID)))";
        String arg1   = "sys as sysdba/tiger@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(Host=hostname)(Port=PORT ID))(CONNECT_DATA=(SID=SID)))";

       //String arg1="/ as sysdba";

        String arg2= fileName;
        //String arg2="conn /as sysdba";
        try {  
            String line;  
            ProcessBuilder pb = new ProcessBuilder(sqlCmd, arg1,arg2);  
            Map<String, String> env = pb.environment();  
            env.put("VAR1", arg1);  
            env.put("VAR2", arg2);  
            //env.put("VAR3", arg3);
            pb.directory(new File(sqlPath));  
            pb.redirectErrorStream(true);  
            Process p = pb.start();  
            BufferedReader bri = new BufferedReader  
            (new InputStreamReader(p.getInputStream()));  
            BufferedReader bre = new BufferedReader  
            (new InputStreamReader(p.getErrorStream()));  
            while ((line = bri.readLine()) != null) {  
            System.out.println(line);  
            }  
            bri.close();  
            while ((line = bre.readLine()) != null) {  
            System.out.println(line);  
            }  
            bre.close();  
            System.out.println("\n\n\n");
            System.out.println("Done.");  
            }  
            catch (Exception err) {  
                err.printStackTrace();  
            }  
        }  
   } 

When I try to run this code, I find this error:

SQL*Plus: Release 11.2.0.1.0 Production on Thu Apr 10 11:08:59 2014

Copyright (c) 1982, 2010, Oracle.  All rights reserved.


SQL*Plus: Release 11.2.0.1.0 Production

Copyright (c) 1982, 2010, Oracle.  All rights reserved.

Use SQL*Plus to execute SQL, PL/SQL and SQL*Plus statements.

Usage 1: sqlplus -H | -V

    -H         Displays the SQL*Plus version and the
           usage help.
    -V         Displays the SQL*Plus version.

Usage 2: sqlplus [ [<option>] [{logon | /nolog}] [<start>] ]
...

... and the rest of the SQL*Plus 'usage' information.

Am I supplying wrong arg1 argument or is there any other way of connecting as SYS in Oracle through Java.

Answer 1

I found the answer by hit and try and its the connection string.

If one wants to connect as sysdba/sysoper the connection string should be like:

public static void test_script () {  
String fileName = "@t.sql";  
String sqlPath = "D:\\";  
String sqlCmd = "sqlplus";  
// IP_address,portid and sid are variables to be entered and t.sql is the file to be read .It contains show user command 
String arg3   = "sys/oracle123@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(Host=IP_address)(Port=portid))(CONNECT_DATA=(SID=sid))) as sysdba";
String arg4= fileName;
try {  
    String line;  
    ProcessBuilder pb = new ProcessBuilder(sqlCmd,arg3,arg4);
    Map<String, String> env = pb.environment();  
    env.put("VAR3", arg3);
    env.put("VAR4", arg4);
    pb.directory(new File(sqlPath));  
    pb.redirectErrorStream(true);  
    Process p = pb.start();  
    BufferedReader bri = new BufferedReader(new InputStreamReader(p.getInputStream()));  
    BufferedReader bre = new BufferedReader(new InputStreamReader(p.getErrorStream()));  
    while ((line = bri.readLine()) != null) {  
        System.out.println(line);  
    }       
    bri.close();  
    while ((line = bre.readLine()) != null) {  
        System.out.println(line);  
    }  
    bre.close();  
    System.out.println("\n\n\n");
    System.out.println("Done.");  
}  
catch (Exception err) {  
    err.printStackTrace();  
}  

}

Answer 2

Think your arg1 should be as below:

              String arg1   = "scott as sysdba/<syspwd>@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(Host=hostname)(Port=PORT ID))(CONNECT_DATA=(SID=SID)))";

Answer 3

You're passing all the connection information as a single value; equivalent to this from a command line:

sqlplus "sys as sysdba/tiger@<connect_string>"

which would get the same response of printing the SQL*Plus logon help. You also have your password in the wrong place but it isn't getting that far. From a command line this would work:

sqlplus "sys/tiger" "as" "sysdba@<connect_string>"

so you need to pass 5 arguments to ProcessBuilder, something like:

    String sqlCmd = "sqlplus";  
    String arg1   = "sys/tiger";
    String arg2   = "as";
    String arg3   = "sysdba@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(Host=hostname)(Port=PORT ID))(CONNECT_DATA=(SID=SID)))";
    String arg4   = fileName;
    ...
        ProcessBuilder pb = new ProcessBuilder(sqlCmd, arg1, arg2, arg3, arg4);

This will still only work if your environment is configured to allow remote connection as sysdba. Doing anything as sys should be very rare, and having a script you want to run as sys seem unusual enough for a Java wrapper to seem like overkill - and makes it seem like you might connect as sys routinely, which is not a good idea - but maybe this is just a learning exercise.