public RowTypeInfo getRowTypeInfo(){
        Class[] fieldClass = getFieldClasses();
        TypeInformation<?>[] types = new TypeInformation[fieldClass.length];
        String[] fieldNames = getFields();
        for(int i=0; i<fieldClass.length; i++){
            types[i] = TypeInformation.of(fieldClass[i]);
        }

        return new RowTypeInfo(types, fieldNames);
    }
async operator req outside conn pool size, egg rdb conn pool size
core/src/main/java/com/dtstack/flink/sql/side/AbstractSideTableInfo.java