Is Athena used? How are Athena and Glue interlinked?
💡 Model Answer
Athena relies on the AWS Glue Data Catalog to discover table schemas and partition information. Glue crawlers scan your data in S3, infer schemas, and create or update tables in the catalog. Athena queries reference these catalog tables, translating SQL into a distributed query plan that runs on Amazon EMR clusters under the hood. Glue also provides Glue Jobs that can transform data and write the results back to S3, where Athena can subsequently query them. Thus, Glue supplies the metadata and ETL capabilities, while Athena provides the query engine that consumes that metadata.
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