SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier t1
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier empty_table
     TableJoin (children 1)
      Function equals (children 1)
       ExpressionList (children 2)
        Literal UInt64_1
        Literal UInt64_1
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier ALL