DataStream is a data stream in Apache Flink that represents a stream of tuples or records where each record is represented as a Row object. A Row object is a generic container for storing a fixed number of values of different types. It's similar to a Tuple or a Record, but with more flexibility in terms of the types and number of fields it can hold.
DataStream is often used when the structure of the data is not known in advance or when dealing with data that has a large number of fields. It allows developers to work with data in a more dynamic way, without having to define a specific schema or data structure.
To use a DataStream, developers can create a stream from a source, apply transformations to the stream, and then write the results to a sink. Transformations can include filtering, mapping, aggregating, and joining data.
Overall, DataStream provides a flexible and powerful way to work with streaming data in Apache Flink.
