TTreeResult

class description - source file - inheritance tree

class TTreeResult : public TSQLResult

    private:

        void AddField(Int_t field, const char* fieldname)
        void AddRow(TSQLRow* row)
      Bool_t IsValid(Int_t field)

    public:

              TTreeResult TTreeResult()
              TTreeResult TTreeResult(Int_t nfields)
              TTreeResult TTreeResult(const TTreeResult&)
             virtual void ~TTreeResult()
           static TClass* Class()
             virtual void Close(Option_t* option)
            virtual Int_t GetFieldCount()
      virtual const char* GetFieldName(Int_t field) const
               TObjArray* GetRows() const
          virtual TClass* IsA() const
         virtual TSQLRow* Next()
             virtual void ShowMembers(TMemberInspector& insp, char* parent)
             virtual void Streamer(TBuffer& b)
                     void StreamerNVirtual(TBuffer& b)

Data Members

    private:

           Int_t fColumnCount  number of columns in result
        TString* fFields       [fColumnCount] array containing field strings
      TObjArray* fResult       query result (TTreeRow objects)
           Int_t fNextRow      row iterator

Class Description

                                                                      
 TTreeResult                                                          
                                                                      
 Class defining interface to a TTree query result with the same       
 interface as for SQL databases. A TTreeResult is returned by         
 TTree::Query() (actually TTreePlayer::Query()).                      
                                                                      
 Related classes are TTreeRow.

TTreeResult()

 Create a query result object.

TTreeResult(Int_t nfields)

 Create a query result object.

~TTreeResult()

 Cleanup result object.

void Close(Option_t *)

 Close query result.

Bool_t IsValid(Int_t field)

 Check if result set is open and field index within range.

Int_t GetFieldCount()

 Get number of fields in result.

const char* GetFieldName(Int_t field)

 Get name of specified field.

TSQLRow* Next()

 Get next query result row. The returned object must be
 deleted by the user and becomes invalid when the result set is
 closed or deleted.

void AddField(Int_t field, const char *fieldname)

 Add field name to result set. This is an internal method that is not
 exported via the abstract interface and that should not be user called.

void AddRow(TSQLRow *row)

 Adopt a row to result set. This is an internal method that is not
 exported via the abstract interface and that should not be user called.

Inline Functions

         TObjArray* GetRows() const
            TClass* Class()
            TClass* IsA() const
               void ShowMembers(TMemberInspector& insp, char* parent)
               void Streamer(TBuffer& b)
               void StreamerNVirtual(TBuffer& b)
        TTreeResult TTreeResult(const TTreeResult&)

Author: Fons Rademakers 30/11/99
Last update: root/tree:$Name: $:$Id: TTreeResult.cxx,v 1.3 2001/12/08 15:18:36 brun Exp $
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *

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