How to use

explainTerms

method

in

org.apache.calcite.rel.core.Window

@Override
public RelWriter explainTerms(RelWriter pw) {
  return super.explainTerms(pw)
      .item("ctx", context == null ? "" : String.valueOf(context.id) + "@" + context.realization)//
      .itemIf("constants", constants, !constants.isEmpty()) //
      .itemIf("groups", groups, !groups.isEmpty());
}

@Override
public RelWriter explainTerms(RelWriter pw) {
  return super.explainTerms(pw)
      .item("ctx", context == null ? "" : String.valueOf(context.id) + "@" + context.realization)//
      .itemIf("constants", constants, !constants.isEmpty()) //
      .itemIf("groups", groups, !groups.isEmpty());
}