Serde in hive

• Apache Hive uses Serde to read and write data from tables.
• A SerDe is a short name for a Serializer Deserializer.
• An important concept behind Hive is that it DOES NOT own the Hadoop File System (HDFS) format that data is stored in.
• Apache Hive SerDe.deserialize() used to select the data;when method is called and inserting the data SerDe.serialize() method is called.
• It uses the SerDe interface for IO.
• In SerDe interface handles both serialization and deserialization and also interpreting the results of serialization as individual fields for processing.
• It allows Hive to read data from a table, and write it back to HDFS in any format, user can write data formats.