Hi, We have a use case in which we want to construct queries programmatically which Drill would then execute.
So far I've been able to configure a Jdbc StorageEngine, and initialize a LogicalPlan (using the builder) with that. I am having difficulty trying to configure scan, project, and filters. I know I need to construct a LogicalOperator, and these are implemented in org.apache.drill.common.logical.data However to construct an operator instance I need one or more of: JSONOptions, NamedExpression, LogicalExpression, FieldReference. So right now I have something like this, but don't know how to fill in the missing pieces... // scan JSONOptions opts = new JSONOptions(...); builder.addLogicalOperator(Scan.builder().storageEngine("pg").selection(opts).build()); // project NamedExpression nex = new NamedExpression(...); builder.addLogicalOperator(Project.builder().addExpr(nex)); LogicalPlan plan = builder.build(); Is there any documentation yet, similar to what calcite has for the RelBuilder (https://calcite.apache.org/docs/algebra.html)? I suppose I could also construct a RelNode and then try to convert that to a LogicalPlan, would I be missing out on any drill features this way? Thanks in advance