Apache Iceberg Introduces REGISTER and UNREGISTER APIs for Data Portability

Apache Iceberg™ has introduced REGISTER and UNREGISTER APIs to its REST catalog specification, facilitating data portability and management. The REGISTER API allows users to attach existing tables to any Iceberg catalog, while the UNREGISTER API mitigates the risk of 'split-brain' scenarios during data transfers. This update aims to streamline the transition from proprietary data warehouses to open storage formats, enabling better interoperability with data management solutions like Unity Catalog, Spark, and Trino. The operations are executed via POST requests to the respective endpoints, enhancing the overall data management framework. Notably, the introduction of UNREGISTER addresses a critical gap in the data hand-off process, as highlighted by the statement: "Without UNREGISTER, the hand-off equation for REGISTER was missing its second half." This development follows previous enhancements in data management tools, further solidifying Apache Iceberg's commitment to open data formats.