qsqldatabase.h

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QSQLDATABASE_H
#define QSQLDATABASE_H
 
#include <QtSql/qtsqlglobal.h>
#include <QtCore/qstring.h>
 
QT_BEGIN_NAMESPACE
 
 
class QSqlError;
class QSqlDriver;
class QSqlIndex;
class QSqlRecord;
class QSqlQuery;
class QSqlDatabasePrivate;
 
class Q_SQL_EXPORT QSqlDriverCreatorBase
{
public:
    virtual ~QSqlDriverCreatorBase() {}
    virtual QSqlDriver *createObject() const = 0;
};
 
template <class T>
class QSqlDriverCreator : public QSqlDriverCreatorBase
{
public:
    QSqlDriver *createObject() const override { return new T; }
};
 
class Q_SQL_EXPORT QSqlDatabase
{
public:
    QSqlDatabase();
    QSqlDatabase(const QSqlDatabase &other);
    ~QSqlDatabase();
 
    QSqlDatabase &operator=(const QSqlDatabase &other);
 
    bool open();
    bool open(const QString& user, const QString& password);
    void close();
    bool isOpen() const;
    bool isOpenError() const;
    QStringList tables(QSql::TableType type = QSql::Tables) const;
    QSqlIndex primaryIndex(const QString& tablename) const;
    QSqlRecord record(const QString& tablename) const;
#if QT_DEPRECATED_SINCE(6, 6)
    QT_DEPRECATED_VERSION_X_6_6("Use QSqlQuery::exec() instead.")
    QSqlQuery exec(const QString& query = QString()) const;
#endif
    QSqlError lastError() const;
    bool isValid() const;
 
    bool transaction();
    bool commit();
    bool rollback();
 
    void setDatabaseName(const QString& name);
    void setUserName(const QString& name);
    void setPassword(const QString& password);
    void setHostName(const QString& host);
    void setPort(int p);
    void setConnectOptions(const QString& options = QString());
    QString databaseName() const;
    QString userName() const;
    QString password() const;
    QString hostName() const;
    QString driverName() const;
    int port() const;
    QString connectOptions() const;
    QString connectionName() const;
    void setNumericalPrecisionPolicy(QSql::NumericalPrecisionPolicy precisionPolicy);
    QSql::NumericalPrecisionPolicy numericalPrecisionPolicy() const;
 
    QSqlDriver* driver() const;
 
    static const char *defaultConnection;
 
    static QSqlDatabase addDatabase(const QString& type,
                                 const QString& connectionName = QLatin1StringView(defaultConnection));
    static QSqlDatabase addDatabase(QSqlDriver* driver,
                                 const QString& connectionName = QLatin1StringView(defaultConnection));
    static QSqlDatabase cloneDatabase(const QSqlDatabase &other, const QString& connectionName);
    static QSqlDatabase cloneDatabase(const QString &other, const QString& connectionName);
    static QSqlDatabase database(const QString& connectionName = QLatin1StringView(defaultConnection),
                                 bool open = true);
    static void removeDatabase(const QString& connectionName);
    static bool contains(const QString& connectionName = QLatin1StringView(defaultConnection));
    static QStringList drivers();
    static QStringList connectionNames();
    static void registerSqlDriver(const QString &name, QSqlDriverCreatorBase *creator);
    static bool isDriverAvailable(const QString &name);
 
protected:
    explicit QSqlDatabase(const QString& type);
    explicit QSqlDatabase(QSqlDriver* driver);
 
private:
    friend class QSqlDatabasePrivate;
    QSqlDatabasePrivate *d;
};
 
#ifndef QT_NO_DEBUG_STREAM
Q_SQL_EXPORT QDebug operator<<(QDebug, const QSqlDatabase &);
#endif
 
QT_END_NAMESPACE
 
#endif // QSQLDATABASE_H