/**
* table[命令合成]<br/>
* 查询表备注
* @param runtime 运行环境主要包含驱动适配器 数据源或客户端
* @param catalog catalog
* @param schema schema
* @param pattern 名称统配符或正则
* @param types types "TABLE", "VIEW", "SYSTEM TABLE", "GLOBAL TEMPORARY", "LOCAL TEMPORARY", "ALIAS", "SYNONYM".
* @return String
* @throws Exception Exception
*/