apigw-sfn-express-athena-cdk: Synchronous Athena query API with zero Lambda - #3304
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…with zero Lambda Amazon API Gateway invokes an AWS Step Functions Express Workflow synchronously (StartSyncExecution) that starts an Amazon Athena query, polls it to completion, and returns the result rows in one HTTP call. Amazon Athena queries an AWS Glue table over Amazon S3. No AWS Lambda functions in the request path. Deployed and tested end-to-end in us-east-1.
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Description
Amazon API Gateway invokes an AWS Step Functions Express Workflow synchronously that runs an Amazon Athena query and returns the result rows in a single HTTP request/response, with no AWS Lambda functions in the request path.
Architecture
Amazon API Gateway (REST, StartSyncExecution) -> AWS Step Functions Express Workflow -> Amazon Athena (StartQueryExecution REQUEST_RESPONSE, then a Wait/GetQueryExecution/Choice poll loop to completion, then GetQueryResults) -> results returned as JSON. Amazon Athena queries an AWS Glue table over data in Amazon S3; results are written to an S3 results prefix.
Deployed and Tested
Deployed in us-east-1 and tested end-to-end: a POST with a SQL query returns Athena result rows synchronously in one call; the Express execution completes with SUCCEEDED.
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