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Top Forums Shell Programming and Scripting shell script pattern matching Post 302352871 by mirfan on Monday 14th of September 2009 01:02:22 AM
Old 09-14-2009
shell script pattern matching

Thanks for the reply. There is minor misktake in script i already sorted out. Now i have some other problem. which i am saving sql query result in variable. Let say

yahoo=$echo('select yahoo from table | mysql db --skip-column-names')
msn=$echo('select msn from table | mysql db --skip-column-names')

which results

yahoo=NULL
msn=NULL

now i want to compare the results that if yahoo and msn is NULL than don't do anything and if yahoo and msn variables contains email addresses than update another table with those values.

my if condition is not working. Please help me out to sort out this issue.

if [[ -n "$yahoo" && -n "$msn" ]]
then
echo "email found. NOT NULL"
else
echo "email are NULL"
fi

It display result "email are NULL"
while it should display "email found. NOT NULL"
because yahoo & msn both variables contains NULL. Please help me how to compare NULL.
Thanks in advance

~Irfan~
 

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PG_FETCH_ROW(3) 														   PG_FETCH_ROW(3)

pg_fetch_row - Get a row as an enumerated array

SYNOPSIS
array pg_fetch_row (resource $result, [int $row]) DESCRIPTION
pg_fetch_row(3) fetches one row of data from the result associated with the specified $result resource. Note This function sets NULL fields to the PHP NULL value. PARAMETERS
o $result - PostgreSQL query result resource, returned by pg_query(3), pg_query_params(3) or pg_execute(3) (among others). o $row - Row number in result to fetch. Rows are numbered from 0 upwards. If omitted or NULL, the next row is fetched. RETURN VALUES
An array, indexed from 0 upwards, with each value represented as a string. Database NULL values are returned as NULL. FALSE is returned if $row exceeds the number of rows in the set, there are no more rows, or on any other error. EXAMPLES
Example #1 pg_fetch_row(3) example <?php $conn = pg_pconnect("dbname=publisher"); if (!$conn) { echo "An error occurred. "; exit; } $result = pg_query($conn, "SELECT author, email FROM authors"); if (!$result) { echo "An error occurred. "; exit; } while ($row = pg_fetch_row($result)) { echo "Author: $row[0] E-mail: $row[1]"; echo "<br /> "; } ?> SEE ALSO
pg_query(3), pg_fetch_array(3), pg_fetch_object(3), pg_fetch_result(3). PHP Documentation Group PG_FETCH_ROW(3)
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