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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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MSSQL_FIELD_SEEK(3)													       MSSQL_FIELD_SEEK(3)

mssql_field_seek - Seeks to the specified field offset

SYNOPSIS
bool mssql_field_seek (resource $result, int $field_offset) DESCRIPTION
Seeks to the specified field offset. If the next call to mssql_fetch_field(3) won't include a field offset, this field would be returned. PARAMETERS
o $result - The result resource that is being evaluated. This result comes from a call to mssql_query(3). o $field_offset - The field offset, starts at 0. RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 Using mssql_field_seek(3) on the example for mssql_fetch_field(3) <?php // Connect to MSSQL and select the database mssql_connect('MANGOSQLEXPRESS', 'sa', 'phpfi'); mssql_select_db('php'); // Send a select query to MSSQL $query = mssql_query('SELECT * FROM [php].[dbo].[persons]'); // Construct table echo '<h3>Table structure for 'persons'</h3>'; echo '<table border="1">'; // Table header echo '<thead>'; echo '<tr>'; echo '<td>Field name</td>'; echo '<td>Data type</td>'; echo '<td>Max length</td>'; echo '</tr>'; echo '</thead>'; // Dump all fields echo '<tbody>'; for ($i = 0; $i < mssql_num_fields($query); ++$i) { // Fetch the field information, notice the // field_offset parameter is not set. See // the mssql_field_seek call below $field = mssql_fetch_field($query); // Print the row echo '<tr>'; echo '<td>' . $field->name . '</td>'; echo '<td>' . strtoupper($field->type) . '</td>'; echo '<td>' . $field->max_length . '</td>'; echo '</tr>'; // Move the internal seek pointer to the next // row in the result set mssql_field_seek($query, $i + 1); } echo '</tbody>'; echo '</table>'; // Free the query result mssql_free_result($query); ?> SEE ALSO
mssql_fetch_field(3). PHP Documentation Group MSSQL_FIELD_SEEK(3)
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