示例#1
0
文件: RexUtil.java 项目: kunlqt/optiq
 public RexNode visitFieldAccess(RexFieldAccess fieldAccess) {
   final RexNode expr = fieldAccess.getReferenceExpr();
   expr.accept(this);
   final RexNode normalizedExpr = lookup(expr);
   if (normalizedExpr != expr) {
     fieldAccess = new RexFieldAccess(normalizedExpr, fieldAccess.getField());
   }
   return register(fieldAccess);
 }
示例#2
0
  public JavaRel findRel(JavaRel rel, RexNode expression) {
    if (expression instanceof RexInputRef) {
      RexInputRef variable = (RexInputRef) expression;

      // REVIEW jvs 30-May-2005:  What's up with this?  The "&& false"
      // should have at least a comment!
      if ((rel instanceof JoinRelBase) && false) {
        return (JavaRel) findInputRel(rel, variable.getIndex());
      } else {
        return (JavaRel) rel.getInput(variable.getIndex());
      }
    } else if (expression instanceof RexFieldAccess) {
      RexFieldAccess fieldAccess = (RexFieldAccess) expression;
      String fieldName = fieldAccess.getName();
      RexNode refExp = fieldAccess.getReferenceExpr();
      JavaRel rel2 = findRel(rel, refExp); // recursive
      if (rel2 == null) {
        return null;
      }
      return implementFieldAccess(rel2, fieldName);
    } else {
      return null;
    }
  }