Qt 4.8
qsqlcachedresult_p.h
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41 
42 #ifndef QSQLCACHEDRESULT_P_H
43 #define QSQLCACHEDRESULT_P_H
44 
45 //
46 // W A R N I N G
47 // -------------
48 //
49 // This file is not part of the Qt API. It exists for the convenience
50 // of other Qt classes. This header file may change from version to
51 // version without notice, or even be removed.
52 //
53 // We mean it.
54 //
55 
56 #include "QtSql/qsqlresult.h"
57 
59 
60 class QVariant;
61 template <typename T> class QVector;
62 
64 
66 {
67 public:
68  virtual ~QSqlCachedResult();
69 
71 
72 protected:
73  QSqlCachedResult(const QSqlDriver * db);
74 
75  void init(int colCount);
76  void cleanup();
77  void clearValues();
78 
79  virtual bool gotoNext(ValueCache &values, int index) = 0;
80 
81  QVariant data(int i);
82  bool isNull(int i);
83  bool fetch(int i);
84  bool fetchNext();
85  bool fetchPrevious();
86  bool fetchFirst();
87  bool fetchLast();
88 
89  int colCount() const;
90  ValueCache &cache();
91 
92  void virtual_hook(int id, void *data);
93 private:
94  bool cacheNext();
96 };
97 
99 
100 #endif // QSQLCACHEDRESULT_P_H
The QVariant class acts like a union for the most common Qt data types.
Definition: qvariant.h:92
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
The QSqlDriver class is an abstract base class for accessing specific SQL databases.
Definition: qsqldriver.h:68
virtual bool fetchFirst()=0
Positions the result to the first record (row 0) in the result.
The QVector class is a template class that provides a dynamic array.
Definition: qdatastream.h:64
virtual QVariant data(int i)=0
Returns the data for field index in the current row as a QVariant.
#define Q_SQL_EXPORT
Definition: qglobal.h:1451
#define QT_BEGIN_NAMESPACE
This macro expands to.
Definition: qglobal.h:89
QSqlCachedResultPrivate * d
static bool init
virtual bool fetchNext()
Positions the result to the next available record (row) in the result.
Definition: qsqlresult.cpp:555
static const char * data(const QByteArray &arr)
quint16 values[128]
virtual bool fetchLast()=0
Positions the result to the last record (last row) in the result.
virtual void virtual_hook(int id, void *data)
Definition: qsqlresult.cpp:962
QVector< QVariant > ValueCache
static void cleanup()
Definition: qpicture.cpp:1508
virtual bool fetchPrevious()
Positions the result to the previous record (row) in the result.
Definition: qsqlresult.cpp:571
quint16 index
virtual bool fetch(int i)=0
Positions the result to an arbitrary (zero-based) row index.
The QSqlResult class provides an abstract interface for accessing data from specific SQL databases...
Definition: qsqlresult.h:63
virtual bool isNull(int i)=0
Returns true if the field at position index in the current row is null; otherwise returns false...