Introduction
Apache Calcite is a dynamic data management framework with SQL parser, optimizer, executor, and JDBC driver.
Many examples of Apache Calcite usage demonstrate the end-to-end execution of queries using JDBC driver, some built-in optimization rules, and the Enumerable executor. Our customers often have their own execution engines and JDBC drivers. So how to use Apache Calcite for query optimization only, without its JDBC driver and Enumerable executor?