[Qt-interest] connect mysql

[pengliang(彭亮)]

Hello 

   I don’t know why application always output that information. Anybody could tell me why.

 

 

 

---------------------------------    snippets

    query.clear();

    f5ErpDb.close();

    f5ErpDb.removeDatabase("QODBC");

    

camMysqlDb = QSqlDatabase::addDatabase("QMYSQL");

 

 

-------------------    application output

QSqlDatabasePrivate::removeDatabase: connection 'qt_sql_default_connection' is still in use, all queries will cease to work.

QSqlDatabasePrivate::addDatabase: duplicate connection name 'qt_sql_default_connection', old connection removed.

 

 

 

 

 

 

 

 

 

 

 

 

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