Attempting to iterate over MySQL tables using PHP

gistfile1.php

<?php
ini_set('display_errors', 'On');
error_reporting(E_ALL | E_STRICT);

if (($argc < 2) || ($argc > 4)){
        print "$argv[0] <application env>\n";
        exit(1);
}

if (!defined('APPLICATION_ENV'))
        define('APPLICATION_ENV', $argv[1]);
require_once 'bootstrap.php';
require_once 'Company/DataSourceUtil.php';
require_once 'Company/Graphite.php';

function getSqlResult($db, $sql) {
        try {
                $result = $db->fetchOne($sql);
        } catch (Zend_Db_Exception $e) {
                echo "SQL ERROR: ".$e->getMessage();
        }

        return $result;
}

$master = Zend_Registry::get('master');

//Date used for SQL queries
$now = strftime('%F');
$ts = strtotime($now);
$result = array();

foreach (DataSourceUtil::getAllPartitionIds() as $partitionId) {

        $partitionDb = DataSourceUtil::getDataDb($partitionId);
        $partitionDbName = DataSourceUtil::getDbName(DataSourceUtil::getPartitionDataSourceName($partitionId));

        //Broken code starts here
        $sql = "SHOW TABLES FROM $partitionDbName";
        $tables = getSqlResult($partitionDb, $sql);
        foreach ($tables as $table) {
              echo "$partitionDbName $table";
        }
}