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)
     Function toUInt64 (children 1)
      ExpressionList (children 1)
       Identifier key
     Function range (children 1)
      ExpressionList (children 1)
       Literal UInt64_100
