SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function arraySlice (alias y) (children 1)
     ExpressionList (children 3)
      Function groupArray (children 1)
       ExpressionList (children 1)
        Identifier x
      Literal Int64_-9223372036854775808
      Literal NULL
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 3)
          ExpressionList (children 2)
           Literal \'6553.5\'
           Function uniqState (alias x) (children 1)
            ExpressionList (children 1)
             Literal NULL
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Function numbers (children 1)
              ExpressionList (children 1)
               Literal UInt64_3
          ExpressionList (children 1)
           Identifier number