AWS Glue Streaming ETL jobs support schema detection and evolution
Streaming extract, transform, and load (ETL) jobs in AWS Glue can now automatically detect the schema of incoming records and gracefully handle schema changes on a per-record basis. Previously, you needed to specify the schema of incoming data using the AWS Glue Data Catalog and update ETL scripts to handle schema changes. The AWS Glue job can now do both for you, saving time on reworking code and increasing the flexibility of your ETL jobs.
Source:: Amazon AWS