SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 4)
    Identifier column
    Identifier subcolumns.names (alias sname)
    Identifier subcolumns.types (alias stype)
    Function greater (children 1)
     ExpressionList (children 2)
      Identifier subcolumns.bytes_on_disk
      Literal UInt64_0
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.parts_columns
    TablesInSelectQueryElement (children 1)
     ArrayJoin (children 1)
      ExpressionList (children 1)
       Identifier subcolumns
   Function and (children 1)
    ExpressionList (children 3)
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier database
       Function currentDatabase (children 1)
        ExpressionList
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier table
       Literal \'t_subcolumns_sizes\'
     Identifier active
   ExpressionList (children 3)
    OrderByElement (children 1)
     Identifier column
    OrderByElement (children 1)
     Identifier sname
    OrderByElement (children 1)
     Identifier stype
