public function showTables()
	{
		$query = $this->getQuery(true)
			->select('table_name')
			->from('information_schema.tables')
			->where('table_type=' . $this->quote('BASE TABLE'))
			->where('table_schema NOT IN (' . $this->quote('pg_catalog') . ', ' . $this->quote('information_schema') . ' )');

		$this->setQuery($query);

		return $this->loadColumn();
	}