---
title: StarRocks
description: Connect StarRocks to R2 Data Catalog to query and modify Iceberg tables.
image: https://developers.cloudflare.com/dev-products-preview.png
---

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# StarRocks

Below is an example of using [StarRocks ↗](https://docs.starrocks.io/docs/data%5Fsource/catalog/iceberg/iceberg%5Fcatalog/#rest) to connect, query, modify data from R2 Data Catalog (read-write).

## Prerequisites

* Sign up for a [Cloudflare account ↗](https://dash.cloudflare.com/sign-up/workers-and-pages).
* [Create an R2 bucket](https://developers.cloudflare.com/r2/buckets/create-buckets/) and [enable the data catalog](https://developers.cloudflare.com/r2/data-catalog/manage-catalogs/#enable-r2-data-catalog-on-a-bucket).
* [Create an R2 API token](https://developers.cloudflare.com/r2/api/tokens/) with both [R2 and data catalog permissions](https://developers.cloudflare.com/r2/api/tokens/#permissions).
* A running [StarRocks ↗](https://www.starrocks.io/) frontend instance. You can use the [all-in-one ↗](https://docs.starrocks.io/docs/quick%5Fstart/shared-nothing/#launch-starrocks) docker setup.

## Example usage

In your running StarRocks instance, run these commands:

```
-- Create an Iceberg catalog named `r2` and set it as the current catalog
CREATE EXTERNAL CATALOG r2PROPERTIES(    "type" = "iceberg",    "iceberg.catalog.type" = "rest",    "iceberg.catalog.uri" = "<r2_catalog_uri>",    "iceberg.catalog.security" = "oauth2",    "iceberg.catalog.oauth2.token" = "<r2_api_token>",    "iceberg.catalog.warehouse" = "<r2_warehouse_name>");
SET CATALOG r2;
-- Create a database and display all databases in newly connected catalog
CREATE DATABASE testdb;
SHOW DATABASES FROM r2;
+--------------------+| Database           |+--------------------+| information_schema || testdb             |+--------------------+2 rows in set (0.66 sec)
```

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