I need to add a user-defined function to Calcite that takes an integer as a parameter and returns an integer. public class SquareFunction { public int eval(int a) { return a*a; } } and the ...

I would like to use the apache calcite api raw without using jdbc connections. I can use the jdbc api just fine but I am getting null ptr exceptions when trying to use the api. What I did so far is...

I am using Apache Calcite to implement a distributed OLAP system, which datasource is RDBMS. So I want to push down the project/filter/aggregation in RelNode tree to MyTableScan extends TableScan. ...

I am trying to query a Postgres DB using Apache Calcite. I can peruse metadata about the database via the Calcite JDBC driver so I am definitely able to connect to it but whenever I query a table, ...

I am trying to do some basic things with calcite to understand the framework. I have setup a simple example that is supposed to read from 2 json files. My model looks like { version: '1.0', def...