PHP SQL with NoSQL

// script db._table.contact.get.post_process

// for each record in the MySQL db service, query the MongoDB service to get the Twitter handle for that contact

$content = $event['response']['content'];
$api = $platform['api'];
$get = $api->get;

if (isset($content['resource']) && !empty($content['resource'])) {

    foreach($content['resource'] as $k => $record){
        // filter by email
        $params = [
               'filter' => 'email=' . $record['email']
        ];

        // get matching record from MongoDB service
        $result = $get('mongodb/_table/contact', $params);

        // from_mongo_twitter can be a field in MySQL schema, but it doesn't have to be                
        $record['from_mongo_twitter'] = $result['content']['resource'][0]['twitter'];
        $event['response']['content']['resource'][$k] = $record;

        // set this flag if you change the response content
        // you can also set $event['response']['status_code'] and $event['response']['content_type']
        $event['response']['content_changed'] = true;
    }
}