[ANNOUNCE] Apache Calcite 1.28.0 released

[Julian Hyde <jh...@apache.org>]

The Apache Calcite team is pleased to announce the release of Apache
Calcite 1.28.0.

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 four months after 1.27.0, contains contributions
from 38 authors, and resolves 76 issues. New features include the
UNIQUE sub-query predicate, the MODE aggregate function, the
PERCENTILE_CONT and PERCENTILE_DISC inverse distribution functions, an
Exasol dialect for the JDBC adapter, and improvements to materialized
view recognition.

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

  <dependency>
    <groupId>org.apache.calcite</groupId>
    <artifactId>calcite-core</artifactId>
    <version>1.28.0</version>
  </dependency>

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

  https://calcite.apache.org/downloads/

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

  https://calcite.apache.org/news/2021/10/19/release-1.28.0/

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

   https://calcite.apache.org/

Thanks to everyone involved!

Julian Hyde, on behalf of the Apache Calcite Team