SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function count (children 1)
     ExpressionList
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier samples
   Function in (children 1)
    ExpressionList (children 2)
     Identifier key
     Function arraySlice (children 1)
      ExpressionList (children 3)
       Function range (children 1)
        ExpressionList (children 1)
         Literal UInt64_100
       Literal UInt64_10
       Literal UInt64_10
