SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function base58Encode (children 1)
     ExpressionList (children 1)
      Identifier val
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 1)
           Function arrayJoin (alias val) (children 1)
            ExpressionList (children 1)
             Function array (children 1)
              ExpressionList (children 4)
               Function toFixedString (children 1)
                ExpressionList (children 2)
                 Literal \'\'
                 Literal UInt64_3
               Function toFixedString (children 1)
                ExpressionList (children 2)
                 Literal \'f\'
                 Literal UInt64_3
               Function toFixedString (children 1)
                ExpressionList (children 2)
                 Literal \'fo\'
                 Literal UInt64_3
               Function toFixedString (children 1)
                ExpressionList (children 2)
                 Literal \'foo\'
                 Literal UInt64_3