The Antalya branch of ClickHouse is an open project, and you can contribute to it in many ways. You can help with ideas, code, or documentation. We appreciate any efforts that help us to make the project better.
Thank you!
The Antalya Project uses a Developer Certificate of Origin (DCO) to sign off that you have the right to contribute the code being contributed. The full text of the DCO reads:
Developer Certificate of Origin
Version 1.1
Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
1 Letterman Drive
Suite D4700
San Francisco, CA, 94129
Everyone is permitted to copy and distribute verbatim copies of this
license document, but changing it is not allowed.
Developer's Certificate of Origin 1.1
By making a contribution to this project, I certify that:
(a) The contribution was created in whole or in part by me and I
have the right to submit it under the open source license
indicated in the file; or
(b) The contribution is based upon previous work that, to the best
of my knowledge, is covered under an appropriate open source
license and I have the right under that license to submit that
work with modifications, whether created in whole or in part
by me, under the same open source license (unless I am
permitted to submit under a different license), as indicated
in the file; or
(c) The contribution was provided directly to me by some other
person who certified (a), (b) or (c) and I have not modified
it.
(d) I understand and agree that this project and the contribution
are public and that a record of the contribution (including all
personal information I submit with it, including my sign-off) is
maintained indefinitely and may be redistributed consistent with
this project or the open source license(s) involved.
Every commit needs to have signed-off-by added to it with a message like:
Signed-off-by: Joe Smith <joe.smith@example.com>
Git makes doing this fairly straightforward. First, please use your real name (sorry, no pseudonyms or anonymous contributions).
If you set your user.name and user.email in your git configuration, you can sign your commit automatically with git commit -s or git commit --signoff.
Signed commits in the git log will look something like:
Author: Joe Smith <joe.smith@example.com>
Date: Thu Jan 2 11:41:15 2026 -0800
Update README
Signed-off-by: Joe Smith <joe.smith@example.com>
Notice how the Author and Signed-off-by lines match. If they do not match the PR will be rejected by the automated DCO check.
If more than one person contributed to a commit, there can be more than one Signed-off-by line where each line is a sign-off from a different person who contributed to the commit.
Optionally, to make contributions even more tight legally, your employer as a legal entity may want to sign an Altinity Corporate DCO with Altinity, Inc. If you're interested to do so, contact us at legal@altinity.com.
There is a developer's guide for writing code for ClickHouse. Besides this guide, you can find an Overview of ClickHouse Architecture and instructions on how to build ClickHouse in different environments.
If you want to contribute to documentation, read the Contributing to ClickHouse Documentation guide.
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