SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 3)
    Literal \'distributed_1\'
    Identifier _shard_num
    Function toUInt8 (alias dummy) (children 1)
     ExpressionList (children 1)
      Literal UInt64_1
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier d_one (alias o)
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier o.dummy
     Literal UInt64_1
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier _shard_num