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
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
 
Test Your Knowledge in Computers #906
Difficulty: Easy
A Unix shell repeatedly prints a prompt, waits for a command line on stdin, and then carries out some action, as directed by the contents of the command line.
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isql(1) 						       UnixODBC manual pages							   isql(1)

NAME
isql, iusql - unixODBC command-line interactive SQL tool SYNOPSIS
isql DSN [USER [PASSWORD]] [options] DESCRIPTION
isql is a command line tool which allows the user to execute SQL in batch or interactively. It has some interesting options such as an option to generate output wrapped in an HTML table. iusql is the same tool with built-in Unicode support. ARGUMENTS
DSN The Data Source Name, which should be used to make connection to the database. The data source is looked for in the /etc/odbc.ini and $HOME/.odbc.ini files in that order, with the latter overwriting the former. USER Specifies the database user/role under which the connection should be made. PASSWORD Password for the specified USER. OPTIONS
-b Run isql in non-interactive batch mode. In this mode, the isql processes its standard input, expecting one SQL command per line. -dDELIMITER Delimits columns with delimiter. -xHEX Delimits columns with HEX, which is a hexadecimal code of the delimiting character in the format 0xNN - i.e. 0x09 for the TAB char- acter. -w Format the result as HTML table. -c Output the names of the columns on the first row. Has any effect only with the -d or -x options. -mNUM Limit the column display width to NUM characters. -lLOCALE Sets locale to LOCALE. -q Wrap the character fields in double quotes. -3 Use the ODBC 3 calls. -n Use the newline processing. -e Use the SQLExecDirect instead of Prepare. -k Use SQLDriverConnect. -v Turn on the verbose mode, where the errors are fully described. Useful for debugging. --version Prints the program version and exits. COMMANDS
This section briefly describes some isql runtime commands. help List all tables in the database. help table List all columns in the table. help help List all help options. EXAMPLES
$ isql WebDB MyID MyPWD -w -b < My.sql Connects to the WebDB as user MyID with password MyPWD, then execute the commands in the My.sql file and returns the results wrapped in HTML table. Each line in My.sql must contain exactly 1 SQL command, except for the last line, which must be blank (unless the -n option is specified). FILES
/etc/odbc.ini System-wide DSN definitions. See odbc.ini(5) for details. $HOME/.odbc.ini User-specific DSN definitions. See odbc.ini(5) for details. SEE ALSO
odbcinst(1), odbc.ini(5) AUTHORS
The authors of unixODBC are Peter Harvey <pharvey@codebydesign.com> and Nick Gorham <nick@easysoft.com>. For the full list of contributors see the AUTHORS file. COPYRIGHT
unixODBC is licensed under the GNU Lesser General Public License. For details about the license, see the COPYING file. version 2.3.1 Tue 25 Jun 2013 isql(1)

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