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 range (children 1)
      ExpressionList (children 1)
       Literal UInt64_10
