SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 4)
    Identifier l.id (alias lid)
    Identifier r.id (alias rid)
    Identifier l.a
    Identifier r.b
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier 03611_t_nullsafe (alias l)
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier 03611_t_nullsafe (alias r)
     TableJoin (children 1)
      Function isNotDistinctFrom (children 1)
       ExpressionList (children 2)
        Identifier l.a
        Identifier r.b
   ExpressionList (children 2)
    OrderByElement (children 1)
     Identifier lid
    OrderByElement (children 1)
     Identifier rid
