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Full Discussion: How to handle NULL value output from ISQL command?
Top Forums Shell Programming and Scripting How to handle NULL value output from ISQL command? Post 302908594 by Sharma331 on Wednesday 9th of July 2014 03:41:32 AM
Old 07-09-2014
How to handle NULL value output from ISQL command?
I am using ISQL command in ksh script.
Suppose if i get NULL value from the query which i run,how can i handle it?

I am getting a NULL result set and the following error is coming.

Code:
############### output of isql command for getting the sum of JEs ################

-----------
        NULL

(1 row affected)
############ Checking if count is blank ###########
NULL
retrieveCheck.ksh[159]:  ^J NULL : 0403-009 The specified number is not valid for this command.

The code is:

Code:
blank=""
isql  -UUSER -PPW -SSERVER -i$tempSQL2 -w1000 -o$sumOfJEOutputFile
retval=$?
echo $retval
if [[ $retval != 0 ]]; then
            echo "Failed to connect to the Archive Database" | mail -s "ERROR OCCURED:Database connection Failed" "akanksha.kumari@libertymutual.com" 
            exit 0
else
            echo "Database connection successful."
fi
echo "coming out of isql command"
echo "############ output of isql command for getting the sum of JEs ################"
cat $sumOfJEOutputFile

egrep -v "row affected|rows affected|------|^                 |return status" $sumOfJEOutputFile > $actualCount
#######################################################################
##     Assigning the total number of JE count to a variable count 
#######################################################################
count=$(cat $actualCount | tr -s "\t" " ")
echo "############## Checking if count is blank #################"
echo $count
if [[ $count -eq $blank ]]; then ## In this line error is coming line number 159
echo "Count is Blank."
exit 0
else
echo "count is not blank"
fi

So i want to know how can i handle this null result set and send a mail to notify that null value is coming.

Thanks
Akanksha
 

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LEARN ABOUT OPENDARWIN

times

times(1)							   User Commands							  times(1)

NAME

       times - shell built-in function to report time usages of the current shell

SYNOPSIS

   sh
       times

   ksh
       times

DESCRIPTION

   sh
       Print the accumulated user and system times for processes run from the shell.

   ksh
       Print the accumulated user and system times for the shell and for processes run from the shell.

       On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:

       1.  Variable assignment lists preceding the command remain in effect when the command completes.

       2.  I/O redirections are processed after variable assignments.

       3.  Errors cause a script that contains them to abort.

       4.  Words,  following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari-
	   able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation  are  not
	   performed.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       ksh(1), sh(1), time(1), attributes(5)

SunOS 5.10							    15 Apr 1994 							  times(1)
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