Sometimes it might be useful to just read or write a single value into Kafka or other connectors. We should add a single-value SerializationSchemaFactory and single-value DeserializationSchemaFactory, the types below and their array types shall be considered.
byte, short, int, long, float, double, string
For the numeric types, we might want to specify the endian format.
A string type single-value format will be added with this issue for future reference.