We are thrilled to announce the new release of RisingWave: the Rust-written, open-source streaming database. RisingWave v1.1 is packed with many exciting new features. Here are the key highlights.


Real-time data ingestion is inherently unordered. To properly handle out-of-order events, we need watermarks.

Accordingly we introduce watermarks in this release. In RisingWave, you can define watermarks in sources and append-only tables. Once you define them, you can use them in time-window aggregations and other stateful operations.

Append-only tables is also a new feature that was introduced in this version to facilitate the definition of watermarks.

For details about watermarks, see Watermarks.

Emit-on-window-close policy

For windowed calculations, we offer the flexibility to emit results either upon update or when the window closes.

Emitting results upon window close is particularly advantageous in certain situations.For example, when writing to append-only downstream systems like Kafka or S3, or when dealing with calculations that benefit from triggering only when the window closes, such as percentile calculations.

Our emit-on-window-close policy, introduced in v1.1, caters to these scenarios.

For details about this policy, see Emit on window close.

Read-only transactions

We recognize the significance of transactions in ensuring data processing consistency and reliability.

In this release, so we have incorporated support for read-only transactions. All reads within a transaction are executed against the consistent snapshot, guaranteeing data consistency as they originate from the same point-in-time.

For details about Read-only transactions, see Transactions.

New window functions

To enhance your data analysis capabilities, we have introduced several new window functions in RisingWave v1.1. These include lead(), lag(), first_value(), and last_value().

For details about new window functions, see Window functions.


These features are just a glimpse of the many exciting additions in RisingWave v1.1. For a comprehensive overview, please refer to the detailed release notes.

As we approach the 2,000th community member, we anticipate even more remarkable progress and success in our mission to revolutionize stream processing for the benefit of all.

Sign up for our monthly newsletter if you’d like to keep up to date on all the happenings with RisingWave. Follow us on Twitter and Linkedin, and join our Slack community to talk to our engineers and hundreds of streaming enthusiasts worldwide.

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Since the release of the first official version in July 2023, RisingWave has successfully been deployed in dozens of renowned enterprises and fast-growing startups. As the development team behind RisingWave, we are eager to hear feedback and suggestions from our community members and make corresponding adjustments to the direction of RisingWave's development. Therefore, we plan to regularly update RisingWave's roadmap to make its development more transparent.

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Welcome to RisingWave community

Get ready to embark on an exciting journey of growth and inspiration. Stay tuned for updates, exclusive content, and opportunities to connect with like-minded individuals.