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    16 ** GNU Lesser General Public License Usage

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    40 ****************************************************************************/

    41 

    42 #ifndef QSQLQUERY_H

    43 #define QSQLQUERY_H

    44 

    45 #include <QtSql/qsql.h>

    46 #include <QtSql/qsqldatabase.h>

    47 #include <QtCore/qstring.h>

    48 

    49 QT_BEGIN_HEADER

    50 

    51 QT_BEGIN_NAMESPACE

    52 

    53 QT_MODULE(Sql)

    54 

    55 class QVariant;

    56 class QSqlDriver;

    57 class QSqlError;

    58 class QSqlResult;

    59 class QSqlRecord;

    60 template <class Key, class T> class QMap;

    61 class QSqlQueryPrivate;

    62 

    63 class Q_SQL_EXPORT QSqlQuery

    64 {

    65 public:

    66     QSqlQuery(QSqlResult *r);

    67     QSqlQuery(const QString& query = QString(), QSqlDatabase db = QSqlDatabase());

    68     explicit QSqlQuery(QSqlDatabase db);

    69     QSqlQuery(const QSqlQuery& other);

    70     QSqlQuery& operator=(const QSqlQuery& other);

    71     ~QSqlQuery();

    72 

    73     bool isValid() const;

    74     bool isActive() const;

    75     bool isNull(int field) const;

    76     int at() const;

    77     QString lastQuery() const;

    78     int numRowsAffected() const;

    79     QSqlError lastError() const;

    80     bool isSelect() const;

    81     int size() const;

    82     const QSqlDriver* driver() const;

    83     const QSqlResult* result() const;

    84     bool isForwardOnly() const;

    85     QSqlRecord record() const;

    86 

    87     void setForwardOnly(bool forward);

    88     bool exec(const QString& query);

    89     QVariant value(int i) const;

    90 

    91     void setNumericalPrecisionPolicy(QSql::NumericalPrecisionPolicy precisionPolicy);

    92     QSql::NumericalPrecisionPolicy numericalPrecisionPolicy() const;

    93 

    94     bool seek(int i, bool relative = false);

    95     bool next();

    96     bool previous();

    97 #ifdef QT3_SUPPORT

    98     inline QT3_SUPPORT bool prev() { return previous(); }

    99 #endif

   100     bool first();

   101     bool last();

   102 

   103     void clear();

   104 

   105     // prepared query support

   106     bool exec();

   107     enum BatchExecutionMode { ValuesAsRows, ValuesAsColumns };

   108     bool execBatch(BatchExecutionMode mode = ValuesAsRows);

   109     bool prepare(const QString& query);

   110     void bindValue(const QString& placeholder, const QVariant& val,

   111                    QSql::ParamType type = QSql::In);

   112     void bindValue(int pos, const QVariant& val, QSql::ParamType type = QSql::In);

   113     void addBindValue(const QVariant& val, QSql::ParamType type = QSql::In);

   114     QVariant boundValue(const QString& placeholder) const;

   115     QVariant boundValue(int pos) const;

   116     QMap<QString, QVariant> boundValues() const;

   117     QString executedQuery() const;

   118     QVariant lastInsertId() const;

   119     void finish();

   120     bool nextResult();

   121 

   122 private:

   123     QSqlQueryPrivate* d;

   124 };

   125 

   126 QT_END_NAMESPACE

   127 

   128 QT_END_HEADER

   129 

   130 #endif // QSQLQUERY_H