> ## Documentation Index
> Fetch the complete documentation index at: https://docs.heyhumm.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Amazon Athena

> Query your S3 data lake via Athena and AWS Glue Data Catalog.

Humm runs read-only SQL queries against your Athena tables, so you can ask questions about data sitting in S3 without moving it anywhere.

If you already have Parquet exports in S3, Humm can query them in place by registering them as Athena external tables. This is different from S3 Data Sync, which copies matching files through Airbyte before querying them.

## Tools

| Tool          | Description                                          |
| ------------- | ---------------------------------------------------- |
| `EXECUTE_SQL` | Run read-only SQL queries against your Athena tables |

## Configuration

Humm uses your organization ID to scope the AWS Glue database automatically. The default AWS region is `us-east-1` — if your data lives in a different region, specify it when setting up the connection.

For large S3 Parquet archives, use partitioned tables and filter by partition columns such as year, month, and day before selecting large payload columns.

## Authentication

<Card title="AWS Credentials" icon="aws">
  AWS Access Key ID and AWS Secret Access Key. The IAM user needs permissions for Athena queries and Glue Data Catalog access.
</Card>