oracle - Managing error handling while running sqlplus from shell scripts

Question

#!/bin/sh

echo "Please enter evaluate database username"
read eval_user
echo "Please enter evaluate database password"
read eval_pass
echo "Please enter the database name"
read db_name

LOGFILE=shell_log.txt

$ORACLE_HOME/bin/sqlplus -s /nolog <<-EOF>> ${LOGFILE}
connect $eval_user/$eval_pass@$db_name
WHENEVER OSERROR EXIT 9;
WHENEVER SQLERROR EXIT SQL.SQLCODE;
DBMS_OUTPUT.put_line('Connected to db');
EOF

if [ $? != 0 ]
then 
echo "The upgrade script failed. Please refer to the log results.txt for more information"
echo "Error code $?"
exit 0;
fi

I am entering garbage values trying to force this script to fail. But, annoyingly, it keeps moving ahead without any mention of any error code. What else needs to be done here?

Answer 1

What Max says is correct. Try this modified script

#!/bin/sh

echo "Please enter evaluate database username"
read eval_user
echo "Please enter evaluate database password"
read eval_pass
echo "Please enter the database name"
read db_name

LOGFILE=shell_log.txt

sqlplus -s /nolog <<-EOF>> ${LOGFILE}
WHENEVER OSERROR EXIT 9;
WHENEVER SQLERROR EXIT SQL.SQLCODE;
connect $eval_user/$eval_pass@$db_name
DBMS_OUTPUT.put_line('Connected to db');
EOF

sql_return_code=$?

if [ $sql_return_code != 0 ]
then
echo "The upgrade script failed. Please refer to the log results.txt for more information"
echo "Error code $sql_return_code"
exit 0;
fi

Please note the use of sql_return_code to capture the SQLPLUS return code.

The DBMS_OUTPUT statement should fail with error - "SP2-0734: unknown command beginning...". You can find the error message in log file.

It is possible to trap the sp2 errors in SQLPLUS 11g using the error logging facility. Please have a look at http://tkyte.blogspot.co.uk/2010/04/new-thing-about-sqlplus.html for more information.