pub fn get_schema_name_from_ext(ext: &HashMap<String, String>) -> Option<String>Expand description
Get the schema name from the extension 从扩展中获取schema名称
Each subject of the request (tenant or application) data will be isolated into different schemas, and the schema name is determined by the isolation flag 每个请求主体（租户或应用）的数据都会被隔离到不同的schema中，schema的名称由隔离标识决定