Importing CSV into database table not working?

global $wpdb;

if (isset($_POST["import"])) {

$fileName = $_FILES["file"]["tmp_name"];

if ($_FILES["file"]["size"] > 0) {

    $file = fopen($fileName, "r");

    while (($column = fgetcsv($file, 10000, ",")) !== FALSE) {


        $table_name = 'sas' ;


        $wpdb->insert( 


            $table_name,


            array( 


            'category' => '" . $column[0] . "',

            'temple' => '" . $column[0] . "'

        )
            );





    }
}
}

I want to import csv directly into the core wordpress database table ‘sas’ .The csv contains some records with the structure of the table i have created…But the import is not successfull..