Calcite is relatively unknown, but it is the base so many other projects are built on. Among them is Apache Flink, which is quite alive and top of its category

Calcite is relatively unknown, but it is the base so many other projects are built on. Among them is Apache Flink, which is quite alive and top of its category (low latency distributed stream processing) https://calcite.apache.org/docs/powered_by.html https://calcite.apache.org/docs/powered_by.html