jeesite中sql拼接

	//entity中，
	extColumnKeys="extColumn,flowStatus",orderBy="a.update_date DESC"
	//service中
	@Override
	public Page<ProductXXX> findPage(ProductXXX productXXX) {
		String extColumnA = "(SELECT SUM(aaa) FROM t_xx c WHERE c.pack_xx_id=a.id) AS \"abc\",";
		productXXX.getSqlMap().add("extColumn", extColumnA);
		//productXXX.getSqlMap().put("flowStatus", "and status != '1'");
		return super.findPage(productXXX);
	}