public function delete($file_path)
 {
     $result = ftp_delete($this->_connection_id, $file_path);
     if ($result) {
         return true;
     } else {
         $log = new \Kiva\Silverpop_Connector\Logger();
         $log->error("Failed to remove {$file_path} from FTP.");
         return false;
     }
 }
 /**
  * @param $vsql
  * @return array
  */
 public function fetchData($vsql)
 {
     try {
         $result = $this->_db->query($vsql);
         $vertica_data = $result->fetchAll();
     } catch (PDOException $e) {
         $log = new \Kiva\Silverpop_Connector\Logger();
         $log->error($e->getMessage());
         exit;
     }
     return $vertica_data;
 }
<?php

require_once './vendor/autoload.php';
const LOCAL_UPLOAD_DIR = './upload';
const LOCAL_SQL_DIR = './src/sql';
if (!is_dir(LOCAL_UPLOAD_DIR)) {
    mkdir(LOCAL_UPLOAD_DIR);
}
$logger = new \Kiva\Silverpop_Connector\Logger();
$logger->info('Starting Silverpop Upload job');
#Connect to vertica
$vertex = new \Kiva\Silverpop_Connector\VertexClient();
$upload_files = array();
#get sql queries
$sql_files = scandir(LOCAL_SQL_DIR);
#get file args if they exist
$sql_files_to_use = array();
foreach ($argv as $key => $val) {
    if ($key === 0) {
        continue;
    }
    array_push($sql_files_to_use, $val);
}
#pull each query into a local file
foreach ($sql_files as $sql_file) {
    $sql_basename = basename($sql_file, '.sql');
    $is_hidden_file = substr($sql_basename, 0, 1) === '.';
    if (!$is_hidden_file) {
        try {
            $query = file_get_contents(LOCAL_SQL_DIR . '/' . $sql_file);
            if (empty($sql_files_to_use) || in_array($sql_basename, $sql_files_to_use)) {