How to use

toString

method

in

org.apache.calcite.rex.RexTableInputRef

@Override public RexNode visitTableInputRef(RexTableInputRef ref) {
 Collection<Integer> c = exprsLineage.get(ref.toString());
 if (c.isEmpty()) {
  // Cannot map expression
  throw Util.FoundOne.NULL;
 }
 int pos = c.iterator().next();
 if (rewritingMapping != null) {
  pos = rewritingMapping.getTargetOpt(pos);
  if (pos == -1) {
   // Cannot map expression
   throw Util.FoundOne.NULL;
  }
 }
 if (node != null) {
  return rexBuilder.makeInputRef(node, pos);
 }
 return rexBuilder.makeInputRef(ref.getType(), pos);
}