SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    Function count (children 1)
     ExpressionList
    Function sum (children 1)
     ExpressionList (children 1)
      Identifier number
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function file (children 1)
       ExpressionList (children 3)
        Literal \'02841.parquet\'
        Identifier Parquet
        Literal \'number UInt64, positive_or_null UInt64\'
   Function indexHint (children 1)
    ExpressionList (children 1)
     Function less (children 1)
      ExpressionList (children 2)
       Identifier positive_or_null
       Literal UInt64_50
