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 (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.
To add to what nehanarkhede said: I'd rather see it as a testament to the powerful building blocks of Kafka and its Streams API that you can actually implement a project such as KSQL with very few engineers.
Also, the commits in KSQL reflect only parts of the work -- it doesn't include design discussions, code reviews, etc.
Lastly, keep in mind that the git repository was cleaned (think: squashed commits) prior to publication, see the very first commit in the repository's timeline. So you don't see the prior work/commits of other Confluent engineers that went into KSQL.
Agreed. We recently had a few more members added to the team and are looking to grow it even more. Also note that KSQL is built on Kafka Streams and we have a team that works just on that as well.
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.