AvroProjectTableScanRule.java

  @Override
  public void onMatch(RelOptRuleCall call) {
    LogicalProject project = call.rel(0);
    AvroTableScan scan = call.rel(1);
    Integer[] fields = getProjectFields(project.getProjects());

    call.transformTo(
      new AvroTableScan(scan.getCluster(), scan.getTable(), fields)
    );
  }