function mark_table($table, $relationship, $alias) {
// Mark that this table has been added.
if (empty($this->tables[$relationship][$table])) {
if (!isset($alias)) {
$alias = '';
if ($relationship != $this->view->storage
->get('base_table')) {
// double underscore will help prevent accidental name
// space collisions.
$alias = $relationship . '__';
}
$alias .= $table;
}
$this->tables[$relationship][$table] = array(
'count' => 1,
'alias' => $alias,
);
}
else {
$this->tables[$relationship][$table]['count']++;
}
return $alias;
}