Issue faced while using the '< ' symbol with AND in sql query - php

Question

I'm getting issue when I try to use < symbol with AND condition in sql query.
WHERE (latitude - 0.009 < AND latitude + 0.00 >)
AND (longitude - 0.009 <
AND longitude + 0.009 > )
Here is my code in CorePHP:
<?php
ini_set("display_errors", 0);
$lat = $_REQUEST['latit'];
$long = $_REQUEST['longit'];
include ("commanvar.php");
include ("class.db.php");
$coordinates_ = '';
// function to calculate distance between two latitudes and longitudes
function distance($lat1, $lng1, $lat2, $lng2, $miles = true)
{
$pi80 = M_PI / 180;
$lat1 *= $pi80;
$lng1 *= $pi80;
$lat2 *= $pi80;
$lng2 *= $pi80;
$r = 6372.797; // mean radius of Earth in km
$dlat = $lat2 - $lat1;
$dlng = $lng2 - $lng1;
$a = sin($dlat / 2) * sin($dlat / 2) + cos($lat1) * cos($lat2) * sin($dlng / 2) * sin($dlng / 2);
$c = 2 * atan2(sqrt($a), sqrt(1 - $a));
$km = $r * $c;
return ($miles ? $km * 0.621371192 : $km);
}
$obj = new db_connect();
// added by pramod
$sql = "SELECT name,
latitude,
longitude,
TYPE
FROM (SELECT name,
TO_BINARY_FLOAT(latitude) latitude,
TO_BINARY_FLOAT(longitude) longitude,
TYPE
FROM (SELECT name,
latitude,
longitude,
TYPE,
is_number (latitude) latisnum,
is_number (longitude) longisnum
FROM (SELECT name,
REGEXP_SUBSTR (latlon,
'[^,]+',
1,
1)
latitude,
REGEXP_SUBSTR (latlon,
'[^,]+',
1,
2)
longitude,
TYPE
FROM (SELECT olt.name,
olt_details.latlon,
'olt' AS TYPE
FROM ftth.olt, ftth.olt_details
WHERE olt_id = id
UNION
SELECT name, latlon, TYPE FROM ftth.splitters
))
WHERE latitude IS NOT NULL AND longitude IS NOT NULL)
WHERE latisnum = 1 AND longisnum = 1)
WHERE (latitude - 0.009 < $lat
AND latitude + 0.00 > $lat)
AND (longitude - 0.009 < $long
AND longitude + 0.009 > $long)";
//die();
$obj->db_query($sql);
// echo $sql;
// echo $lat . ',' . $long;
// define json array coordinates and prepare it's elements for returning via AJAX
$coordinates = '{
"coordinates": [';
while ($result = $obj->db_fetch_array(1)) {
$latitude = $result['LATITUDE'];
$longitude = $result['LONGITUDE'];
$name = $result['NAME'];
$type = $result['TYPE'];
$latlon_fiber = $result['LATITUDE'] . ", " . $result['LONGITUDE'];
$distance_fromswitch = distance($lat, $long, $latitude, $longitude, FALSE);
$distance_fromswitch = floor($distance_fromswitch * 1000);
$coordinates_ .= '{ "distance":"' . $distance_fromswitch . '" ,"site_name":"' . $name . '" , "latitude":"' . $latitude . '" , "longitude":"' . $longitude . '" , "device_type":"' . $type . '" },';
}
$coordinates .= rtrim($coordinates_, ',');
$coordinates .= "]}";
echo $coordinates;
$obj->free();
?>
I'm getting the following error due to this part < AND on line WHERE (latitude - 0.009 < AND latitude + 0.00 >)
ORA-00936: missing expression
00936. 00000 - "missing expression"
I think I've used some improper syntax while using < with AND on line WHERE (latitude - 0.009 < AND latitude + 0.00 >)
What can be the correction that need to be done here?

Answer 1

Think of it! The error message is self-explanatory.
You're trying to compare the result of subtraction to nothing. To correct this, you have to change it to:
WHERE (latitude - 0.009 < SomeValueHere AND latitude + 0.00 > SomeValueHere)
For further details, please see: ORA-00936 missing expression
[EDIT]
As to changes made in the question...
You're asking for help in debugging (inspect) your code. Let me quote the comment to your comment:
probably the variables do not have any values and passing empty
strings into your query.. – skybunk
Thank you, #skybunk!