SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Literal \'hash\'
    Function count (children 1)
     ExpressionList
   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
