Amazon Athena Adds support for User Defined Functions (UDF)

Amazon Athena now supports user-defined functions (UDFs), a feature that enables customers to write custom scalar functions and invoke them in SQL queries. While Athena provides built-in functions, UDFs enable customers to perform custom processing such as compressing and decompressing data, redacting sensitive data, or applying customized decryption.



https://aws.amazon.com/about-aws/whats-new/2019/11/amazon-athena-adds-support-for-user-defined-functions-udf/