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Home > Forums > MIS/IT > Operating Systems - UNIX based > -General UNIX discussion Forum

Testing the status of an ORACLE call in a UNIX script

thread80-1623224
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weberm (Programmer)
8 Oct 10 12:06
I have some inherited UNIX shell scripts that invoke sqlplus via a script called "qs" and then attempt to test their success or failure and behave accordingly but I'm having trouble finding researching "$?" online.  Here is such an example:

CODE

echo '--------------------------------------------------------------'
echo ' STEP01 -- PRODUCE THE UNRECONCILED ECOMMERCE REPORT          '
echo '--------------------------------------------------------------'
echo
$HOME/bin/qs "exec RCPI.ecommerce_reconciliation_rpt"

#Check if last command is successful.
if [ $? -ne 0 ]
then
echo "An error occurred while running the Unreconciled report. Exiting..."
exit 11
fi
Is the script testing a return code of some sort? If so, won't the only time it returns a bad value be if the invoked stored proc returns a non-zero value? ponder
razalas (Programmer)
8 Oct 10 12:14
$? is the shell variable that stores the last return code

A few others are:

CODE

echo "Command name:          " $0
echo "Process id:            " $$
echo "Background Process id: " $!
echo "Number of args:        " $#
echo "Return code:           " $?
echo "Args:                  " $*

man sh

Code what you mean,
and mean what you code!
But by all means post your code!

Razalas

feherke (Programmer)
8 Oct 10 12:33
Hi

Razalas, based on the OP's code, he already knows how to use the $? variable.

weberm, note that qs is a client application, it not executes the received code. So it is not so sure it has to report the errors found by the server. ( I never used qs, this is based on other similar tools' behaviors. )

Personally I would try to detect the errors based on some specific words in the output :

CODE

$HOME/bin/qs "exec RCPI.ecommerce_reconciliation_rpt" 2>&1 | grep -qi 'error'

#Check if last command is successful.
if [ $? -ne 0 ]
then
  echo "An error occurred while running the Unreconciled report. Exiting..."
  exit 11
fi
Tested with GNU grep. Other grep implementations may not support -q ( --quiet ) and -i ( --ignore-case ) switches.

Feherke.
http://free.rootshell.be/~feherke/

weberm (Programmer)
8 Oct 10 13:31

Quote (razalas):

$? is the shell variable that stores the last return code
Thanks! I suspected question mark was a return code shell var but searching for "?" wasn't getting me anywhere.

Quote (feherke ):

weberm, note that qs is a client application, it not executes the received code. So it is not so sure it has to report the errors found by the server. ( I never used qs, this is based on other similar tools' behaviors. )
Personally I would try to detect the errors based on some specific words in the output
Feherke, qs is another script which invokes plsql:

CODE

echo "$*" |sqlplus -s scott/tiger
There are statements in the shell script which grep for "ORA-" and other key words, so I'm wondering why the original coder used $? in the first place since it appears to doing nothing. ponder
SamBones (Programmer)
8 Oct 10 14:17
Well, your "qs" script may not be returning the return code from sqlplus. You might try changing it to this...

CODE --> $HOME/bin/qs

echo "$*" |sqlplus -s scott/tiger
return $?
That way the script's return code is sqlplus' return code.


 
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