---
name: "qsqldriverplugin"
section: "3qt"
platform: "linux"
package: "qt3-doc"
version: "3:3.3.8b-7"
release: "Debian 6.0 (Squeeze)"
platforms: ["linux"]
url: "https://new.carta.tech/qsqldriverplugin"
---

# qsqldriverplugin(3qt)

Abstract base for custom QSqlDriver plugins

## NAME

QSqlDriverPlugin - Abstract base for custom QSqlDriver plugins

## SYNOPSIS

`#include <qsqldriverplugin.h>`

### Public Members

**QSqlDriverPlugin ()**\
 **~QSqlDriverPlugin ()**\
 **virtual QStringList keys () const = 0**\
 **virtual QSqlDriver \* create ( const QString & key ) = 0**\

## DESCRIPTION

The QSqlDriverPlugin class provides an abstract base for custom QSqlDriver plugins.

The SQL driver plugin is a simple plugin interface that makes it easy to create your own SQL driver plugins that can be loaded dynamically by Qt.

Writing a SQL plugin is achieved by subclassing this base class, reimplementing the pure virtual functions keys() and create(), and exporting the class with the `Q_EXPORT_PLUGIN` macro. See the SQL plugins that come with Qt for example implementations (in the `plugins/src/sqldrivers` subdirectory of the source distribution). Read the plugins documentation for more information on plugins.

See also Plugins.

## MEMBER FUNCTION DOCUMENTATION

## QSqlDriverPlugin::QSqlDriverPlugin ()

Constructs a SQL driver plugin. This is invoked automatically by the `Q_EXPORT_PLUGIN` macro.

## QSqlDriverPlugin::~QSqlDriverPlugin ()

Destroys the SQL driver plugin.

You never have to call this explicitly. Qt destroys a plugin automatically when it is no longer used.

## QSqlDriver \* QSqlDriverPlugin::create ( const QString & key )` [pure virtual]`

Creates and returns a QSqlDriver object for the driver key *key*. The driver key is usually the class name of the required driver.

See also keys().

## QStringList QSqlDriverPlugin::keys () const` [pure virtual]`

Returns the list of drivers (keys) this plugin supports.

These keys are usually the class names of the custom drivers that are implemented in the plugin.

See also create().

## SEE ALSO

**http://doc.trolltech.com/qsqldriverplugin.html** **http://www.trolltech.com/faq/tech.html**

## COPYRIGHT

Copyright 1992-2007 Trolltech ASA, http://www.trolltech.com.  See the license file included in the distribution for a complete license statement.

## AUTHOR

Generated automatically from the source code.

## BUGS

If you find a bug in Qt, please report it as described in **http://doc.trolltech.com/bughowto.html**. Good bug reports help us to help you. Thank you.

The definitive Qt documentation is provided in HTML format; it is located at $QTDIR/doc/html and can be read using Qt Assistant or with a web browser. This man page is provided as a convenience for those users who prefer man pages, although this format is not officially supported by Trolltech.

If you find errors in this manual page, please report them to **qt-bugs@trolltech.com**. Please include the name of the manual page (qsqldriverplugin.3qt) and the Qt version (3.3.8).