QSql - incomplete type 'struct QVariant'

[saa7_go]

C:/Documents and Settings/ald/My Documents/SQLStub/SQLStub-build-desktop/../SQLStub/main.cpp:36: error: invalid use of incomplete type 'struct QVariant'
 
c:\Qt\2010.04\qt\include/QtCore/../../src/corelib/kernel/qobject.h:66: error: forward declaration of 'struct QVariant'

C:/Documents and Settings/ald/My Documents/SQLStub/SQLStub-build-desktop/../SQLStub/main.cpp:36: error: invalid use of incomplete type 'struct QVariant'

c:\Qt\2010.04\qt\include/QtCore/../../src/corelib/kernel/qobject.h:66: error: forward declaration of 'struct QVariant'

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You need to add

#include <QVariant>

#include <QVariant>

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I think, it is better to create QSqlQuery object after opening database connection.