SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 2)
    Identifier _part_offset
    Identifier foo
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier t_1
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier order_0
   Literal UInt64_3
