SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 3)
    Identifier key
    Function length (children 1)
     ExpressionList (children 1)
      Identifier t1.s
    Function length (children 1)
     ExpressionList (children 1)
      Identifier t2.s
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier t1 (alias t1)
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier tn2 (alias t2)
     TableJoin (children 1)
      ExpressionList (children 1)
       Identifier key
   ExpressionList (children 3)
    OrderByElement (children 1)
     Identifier key
    OrderByElement (children 1)
     Function length (children 1)
      ExpressionList (children 1)
       Identifier t1.s
    OrderByElement (children 1)
     Function length (children 1)
      ExpressionList (children 1)
       Identifier t2.s
