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****************************************************************************/

#ifndef QSQLQUERY_H

#define QSQLQUERY_H

#include <QtSql/qsql.h>

#include <QtSql/qsqldatabase.h>

#include <QtCore/qstring.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Sql)

class QVariant;

class QSqlDriver;

class QSqlError;

class QSqlResult;

class QSqlRecord;

template <class Key, class T> class QMap;

class QSqlQueryPrivate;

class Q_SQL_EXPORT QSqlQuery

{

public:

    QSqlQuery(QSqlResult *r);

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

    explicit QSqlQuery(QSqlDatabase db);

    QSqlQuery(const QSqlQuery& other);

    QSqlQuery& operator=(const QSqlQuery& other);

    ~QSqlQuery();

    bool isValid() const;

    bool isActive() const;

    bool isNull(int field) const;

    int at() const;

    QString lastQuery() const;

    int numRowsAffected() const;

    QSqlError lastError() const;

    bool isSelect() const;

    int size() const;

    const QSqlDriver* driver() const;

    const QSqlResult* result() const;

    bool isForwardOnly() const;

    QSqlRecord record() const;

    void setForwardOnly(bool forward);

    bool exec(const QString& query);

    QVariant value(int i) const;

    void setNumericalPrecisionPolicy(QSql::NumericalPrecisionPolicy precisionPolicy);

    QSql::NumericalPrecisionPolicy numericalPrecisionPolicy() const;

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

    bool next();

    bool previous();

#ifdef QT3_SUPPORT

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

#endif

    bool first();

    bool last();

    void clear();

    // prepared query support

    bool exec();

    enum BatchExecutionMode { ValuesAsRows, ValuesAsColumns };

    bool execBatch(BatchExecutionMode mode = ValuesAsRows);

    bool prepare(const QString& query);

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

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

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

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

    QVariant boundValue(const QString& placeholder) const;

    QVariant boundValue(int pos) const;

    QMap<QString, QVariant> boundValues() const;

    QString executedQuery() const;

    QVariant lastInsertId() const;

    void finish();

    bool nextResult();

private:

    QSqlQueryPrivate* d;

};

QT_END_NAMESPACE

QT_END_HEADER

#endif // QSQLQUERY_H