how to select a non-drupal (souce db) database in a migrate module can i still use a db_select(); if my source database is a non-drupal site? how can the migrate module know what database im referring? i cant see any configuration for migrate module on how to change database selection.

$query = db_select('sourcedb.brands', 'b');
$query-&gt;addField('i1', 'foreign_key', 'foreign_key');
$query-&gt;addField('i1', 'locale', 'locale');
$query-&gt;addField('i1', 'content', 'brand_description');
$query-&gt;addField('b', 'name', 'brand_name');
$query-&gt;addField('b', 'owg_id', 'owg_id');
$query-&gt;join('sourcedb.i18n', 'i1', 'i1.foreign_key = b.id');
$query-&gt;condition('i1.locale', 'spa', '=');
$query-&gt;condition('i1.model', 'Brand', '=');
$query-&gt;condition('i1.field', 'description', '=');
$query-&gt;orderBy('i1.foreign_key', 'ASC');


is the "sourcedb" in 'sourcedb.brands' a keyword in drupal? or can i replace it directly with the table name?
It would probably be better if you looked at the Feeds module using the Feeds Database fetcher.