Apache Calcite 1.7.0 is the first release since Avatica became an independent project. Calcite now depends on Avatica in the same way as it does other libraries, via a Maven dependency. To see Avatica-related changes, see the release notes for Avatica 1.7.1.
We have added an adapter for Apache Cassandra. You can map a Cassandra keyspace into Calcite as a schema, Cassandra CQL tables as tables, and execute SQL queries on them, which Calcite converts into CQL. Cassandra can define and maintain materialized views but the adapter goes further: it can transparently rewrite a query to use a materialized view even if the view is not mentioned in the query.
This release adds an
If you add
fun=oracle to your JDBC connect string, you get all of
the standard operators and functions plus Oracle-specific functions
LEAST. We look
forward to adding more functions, and compatibility modes for other
databases, in future releases.
We’ve replaced our use of JUL (
with SLF4J. SLF4J provides an API which Calcite can use
independent of the logging implementation. This ultimately provides additional
flexibility to users, allowing them to configure Calcite’s logging within their
own chosen logging framework. This work was done in
For users experienced with configuring JUL in Calcite previously, there are some
differences as some the JUL logging levels do not exist in SLF4J:
FINEST, specifically. To deal with this,
FINE was mapped
DEBUG level, while
FINEST were mapped to SLF4J’s
See the release notes; download the release.