Feed: Recent Announcements.
With this release, crawlers can now take existing tables as sources, detect changes to their schema and update the table definitions, and register new partitions as new data becomes available. This is useful if you want to import existing table definitions from an external Apache Hive Metastore into the AWS Glue Data Catalog and use crawlers to keep these tables up-to-date as your data changes. You can also use this feature if you are creating new table definitions using AWS Glue APIs or Apache Hive DDL statements and want to use crawlers to update the tables going forward.