SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function equals (children 1)
     ExpressionList (children 2)
      Identifier small_hash
      Identifier big_hash
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 2)
           Literal UInt64_1 (alias key)
           Function sum (alias small_hash) (children 1)
            ExpressionList (children 1)
             Function cityHash64 (children 1)
              ExpressionList (children 1)
               Asterisk
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier delta_codec_float
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 2)
           Literal UInt64_1 (alias key)
           Function sum (alias big_hash) (children 1)
            ExpressionList (children 1)
             Function cityHash64 (children 1)
              ExpressionList (children 1)
               Asterisk
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier default_codec_float
     TableJoin (children 1)
      ExpressionList (children 1)
       Identifier key
