The Apache Calcite team is pleased to announce the release of Apache
Calcite 1.23.0.

Calcite is a dynamic data management framework. Its cost-based
optimizer converts queries, represented in relational algebra, into
executable plans. Calcite supports many front-end languages and
back-end data engines, and includes an SQL parser and, as a
sub-project, the Avatica JDBC driver.

This release comes two months after 1.22.0. It includes more than
100 resolved issues, comprising of a few new features as well as
general improvements and bug-fixes. It includes support for top
down trait request and trait enforcement without abstract converter,
ClickHouse dialect, SESSION and HOP Table functions, and many
more bug fixes and improvements.

You can start using it in Maven by simply updating your dependency to:


If you'd like to download the source release, you can find it here:

You can read more about the release (including release notes) here:

We welcome your help and feedback. For more information on how to
report problems, and to get involved, visit the project website at:

Thanks to everyone involved!

Haisheng Yuan, on behalf of the Apache Calcite Team

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