SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Literal \'hash right-only\'
    Function countIf (children 1)
     ExpressionList (children 1)
      Function isNull (children 1)
       ExpressionList (children 1)
        Identifier l.k
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier l
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier r
     TableJoin (children 1)
      Function and (children 1)
       ExpressionList (children 2)
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier l.k
          Identifier r.k
        Function greater (children 1)
         ExpressionList (children 2)
          Identifier l.v
          Identifier r.v
