src/sql/kernel/qsqlresult.h

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  41
  42 #ifndef QSQLRESULT_H
  43 #define QSQLRESULT_H
  44
  45 #include <QtCore/qvariant.h>
  46 #include <QtCore/qvector.h>
  47 #include <QtSql/qsql.h>
  48
  49 QT_BEGIN_HEADER
  50
  51 QT_BEGIN_NAMESPACE
  52
  53 QT_MODULE(Sql)
  54
  55 class QString;
  56 class QSqlRecord;
  57 template <typename T> class QVector;
  58 class QVariant;
  59 class QSqlDriver;
  60 class QSqlError;
  61 class QSqlResultPrivate;
  62
  63 class Q_SQL_EXPORT QSqlResult
  64 {
  65     friend class QSqlQuery;
  66     friend class QSqlTableModelPrivate;
  67     friend class QSqlResultPrivate;
  68
  69 public:
  70     virtual ~QSqlResult();
  71     virtual QVariant handle() const;
  72
  73 protected:
  74     enum BindingSyntax {
  75         PositionalBinding,
  76         NamedBinding
  77 #ifdef QT3_SUPPORT
  78         , BindByPosition = PositionalBinding,
  79         BindByName = NamedBinding
  80 #endif
  81     };
  82
  83     explicit QSqlResult(const QSqlDriver * db);
  84     int at() const;
  85     QString lastQuery() const;
  86     QSqlError lastError() const;
  87     bool isValid() const;
  88     bool isActive() const;
  89     bool isSelect() const;
  90     bool isForwardOnly() const;
  91     const QSqlDriver* driver() const;
  92     virtual void setAt(int at);
  93     virtual void setActive(bool a);
  94     virtual void setLastError(const QSqlError& e);
  95     virtual void setQuery(const QString& query);
  96     virtual void setSelect(bool s);
  97     virtual void setForwardOnly(bool forward);
  98
  99     // prepared query support
 100     virtual bool exec();
 101     virtual bool prepare(const QString& query);
 102     virtual bool savePrepare(const QString& sqlquery);
 103     virtual void bindValue(int pos, const QVariant& val, QSql::ParamType type);
 104     virtual void bindValue(const QString& placeholder, const QVariant& val,
 105                            QSql::ParamType type);
 106     void addBindValue(const QVariant& val, QSql::ParamType type);
 107     QVariant boundValue(const QString& placeholder) const;
 108     QVariant boundValue(int pos) const;
 109     QSql::ParamType bindValueType(const QString& placeholder) const;
 110     QSql::ParamType bindValueType(int pos) const;
 111     int boundValueCount() const;
 112     QVector<QVariant>& boundValues() const;
 113     QString executedQuery() const;
 114     QString boundValueName(int pos) const;
 115     void clear();
 116     bool hasOutValues() const;
 117
 118     BindingSyntax bindingSyntax() const;
 119
 120     virtual QVariant data(int i) = 0;
 121     virtual bool isNull(int i) = 0;
 122     virtual bool reset(const QString& sqlquery) = 0;
 123     virtual bool fetch(int i) = 0;
 124     virtual bool fetchNext();
 125     virtual bool fetchPrevious();
 126     virtual bool fetchFirst() = 0;
 127     virtual bool fetchLast() = 0;
 128     virtual int size() = 0;
 129     virtual int numRowsAffected() = 0;
 130     virtual QSqlRecord record() const;
 131     virtual QVariant lastInsertId() const;
 132
 133     enum VirtualHookOperation { BatchOperation, DetachFromResultSet, SetNumericalPrecision, NextResult };
 134     virtual void virtual_hook(int id, void *data);
 135     bool execBatch(bool arrayBind = false);
 136     void detachFromResultSet();
 137     void setNumericalPrecisionPolicy(QSql::NumericalPrecisionPolicy policy);
 138     QSql::NumericalPrecisionPolicy numericalPrecisionPolicy() const;
 139     bool nextResult();
 140
 141 private:
 142     QSqlResultPrivate* d;
 143     void resetBindCount(); // HACK
 144
 145 private:
 146     Q_DISABLE_COPY(QSqlResult)
 147 };
 148
 149 QT_END_NAMESPACE
 150
 151 QT_END_HEADER
 152
 153 #endif // QSQLRESULT_H