So, I have data in Amazon S3 as parquet files and I have it available in the Glue data catalog too. I want to build an AppSync API on top of this data. Now the two options that I am considering are:

1. Bring the data to Amazon DynamoDB and then build my API on top of this Database.

2. Add a Lambda function that resolves Amazon Athena queries made by AppSync.

Which of the two approaches will be cost effective?

I would really appreciate some back of the envelope estimates too.

Note: I only expect to make read queries. Thanks.