IVivanvas·Oct 3, 2022
There seems to be an overlap with ksqlDB functionality. ksqlDB computation part is based on Kafka Streams.
https://github.com/confluentinc/ksql
In The next generation of Materializeconfluentinc
ksql
Java2017–2022
confluentinc / ksql
ksql
The database purpose-built for stream processing applications.
10Distinct people
10Mentions
1Explicit recommenders
317GitHub stars
What to know before exploring
What it is
The database purpose-built for stream processing applications.
GitHub
Where it is used
No documented product use has been verified yet.
What people are saying
I love the continuous queries over append-only datasets and it's great that Kafka added support for it. It looks like there is one main contributor…
buremba used a recommendation phrase. One indexed comment matches. This is a phrase match, not a verdict.
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This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 3:56:07 PM UTC.
No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.
Mentions over time
HN mentions by year10 dated mentions
Observed mentions: 2017-08-28 16:40:15 UTC to 2022-10-03 21:12:42 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2017 | 2017-01-01 00:00:00 UTC | 2018-01-01 00:00:00 UTC | 5 | 1 | 4 |
| 2018 | 2018-01-01 00:00:00 UTC | 2019-01-01 00:00:00 UTC | 2 | 1 | 1 |
| 2019 | 2019-01-01 00:00:00 UTC | 2020-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2020 | 2020-01-01 00:00:00 UTC | 2021-01-01 00:00:00 UTC | 1 | 1 | 0 |
| 2021 | 2021-01-01 00:00:00 UTC | 2022-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2022 | 2022-01-01 00:00:00 UTC | 2023-01-01 00:00:00 UTC | 2 | 0 | 2 |
What Hacker News says
10 sourcesOne massive difference: https://github.com/confluentinc/ksql/blob/master/LICENSE
In PranaDB – A distributed streaming database, designed to be horizontally scalableKsqlDB, an event streaming database for Apache Kafka
2 points · Open discussion> Yes, there have been companies that called their thing open source even though it wasn't, by the OSI definition, and that's a shitty move. But my impression is that Confluent is not one of those companies.
When you take an open source project and re-license it under a proprietary license (without changing the name, the repository, etc), a lot of scrubbing will be required to erase all representations of the project as being open source.
For example here it took one page view and about 5 seconds to find an example: the ksql repo [0] still has the open-source tag.
[0] https://github.com/confluentinc/ksql
In A EULA in FOSS clothing?KSQL – The Streaming SQL Engine for Apache Kafka
1 points · Open discussionthis link is broken in the article
[step through the demo yourself](https://github.com/confluentinc/ksql/blob/0.1.x/docs/demo.md...)
In KSQL: Open Source Streaming SQL for Apache KafkaI love the continuous queries over append-only datasets and it's great that Kafka added support for it.
It looks like there is one main contributor (https://github.com/confluentinc/ksql/graphs/contributors) though, it seems that the other contributors either wrote the documentation or helped for the packaging. Not a great sign considering how big this project is (there are competitors which only do this such Pipelinedb), hopefully you can create a team just for KSQL.
In KSQL: Open Source Streaming SQL for Apache KafkaThere's a pretty big difference to a point that Landoop's KCQL (Kafka Connect Query Language) and Confluent's KSQL (Streaming SQL for Apache Kafka) are two different products.
- KSQL is a full-fledged Streaming SQL engine for all kinds of stream processing operations from windowed aggregations, stream-table joins, sessionization and much more. So it does more powerful stream processing on Kafka than what Landoop's product supports which is simple projections and filters.
- KSQL can do that because it supports streams and tables as first-class constructs and tightly integrates with Kafka's Streams API and the Kafka log itself. We are not aware of any other products that do that today, including Landoop's tool.
- We will add support for Kafka connectors so you can stream data from different systems into Kafka through KSQL. This will cover w
Read the rest
hat Landoop intended with KCQL (Kafka Connect Query Language.
- Confluent works with several very large enterprises and many of the companies that have adopted Kafka. We worked with those customers to learn what would solve real business problems and used that feedback to build KSQL. So it . models on real-world customer feedback.
- We'd love to hear feedback. Here's the repository https://github.com/confluentinc/ksql and here's the Slack Channel slackpass.io/confluentcommunity - #ksql
Hope that helps!
I really wish frameworks offering SQL would upfront say what level of SQL compatibility they have, is it SQL 2011, is it Postgres etc...
Anyways, if anyone's wondering, here's the Github page. [1]
Also from FAQ [2]:
Is KSQL fully compliant to ANSI SQL?
KSQL is a dialect inspired by ANSI SQL. It has some differences because it is geared at processing streaming data. For example, ANSI SQL has no notion of “windowing” for use cases such as performing aggregations on data grouped into 5-minute windows, which is a commonly required functionality in the streaming world.
[1] https://github.com/confluentinc/ksql/blob/0.1.x/docs/syntax-...
[2] https://github.com/confluentinc/ksql/blob/0.1.x/docs/faq.md#...
In KSQL: Open Source Streaming SQL for Apache KafkaKSQL – A Streaming SQL Engine for Apache Kafka
6 points · Open discussion