How to use

isTrivial

method

in

org.apache.calcite.rex.RexProgram

 public void onMatch(RelOptRuleCall call) {
  LogicalCalc calc = call.rel(0);
  RexProgram program = calc.getProgram();
  if (!program.isTrivial()) {
   return;
  }
  RelNode input = calc.getInput();
  input = call.getPlanner().register(input, calc);
  call.transformTo(
    convert(
      input,
      calc.getTraitSet()));
 }
}

 public void onMatch(RelOptRuleCall call) {
  LogicalCalc calc = call.rel(0);
  RexProgram program = calc.getProgram();
  if (!program.isTrivial()) {
   return;
  }
  RelNode input = calc.getInput();
  input = call.getPlanner().register(input, calc);
  call.transformTo(
    convert(
      input,
      calc.getTraitSet()));
 }
}

 && ((LogicalCalc) rel).getProgram().isTrivial()) {
rel = rel.getInput(0);

 && ((LogicalCalc) rel).getProgram().isTrivial()) {
rel = rel.getInput(0);