Question

I was wondering how sqlplus takes the username and password in connect statement “sqlplus /”.

How can I change the configuration if i want to connect with “sqlplus /” with different user. It Might seems awkward but in my script “sqlplus /” is harcoded and we cannot change this. Just I want to connect with different user using same command.

Answer 1

From the Oracle documentation:

/

Represents a default logon using operating system authentication. In a default logon, SQL*Plus typically attempts to log you in using the username OPS$name, where name is your operating system username. Note that the prefix "OPS$" can be set to any other string of text.

For example, you may wish to change the settings in your INIT.ORA parameters file to LOGONname or USERIDname. See the Oracle9i Database Administrator’s Guide for information about operating system authentication.

So it uses your operating system details to construct your Oracle user name, meaning that you probably can’t set an arbitrary name.

The Oracle initialisation parameter for specifying the prefix is OS_AUTHENT_PREFIX and its default value id OPS$.

One thing you could do, if you cannot change the script which calls sqlplus, is to insert your own sqlplus script in the path before the Oracle one, along the lines of (not thoroughly tested):

#!/bin/bash
if [[ "$1" != "/" ]] ; then
    $ORACLE_HOME/bin/sqlplus "$@"
    exit
fi
shift
$ORACLE_HOME/bin/sqlplus $MY_ORA_USER/$MY_ORA_PWD "$@"

This would then be the one called by your script and it would check the first parameter to see if it was the simple /. If not, it would call the real sqlplus with the same parameters.

Otherwise, it would replace the / with a user/password formed from the MY_ORA_* environment variables.