Add ability to set reconnect flag on MySQL connections

Add database server ping method to SQL classes

src/sql/drivers/ibase/qsql_ibase.cpp

@@ -848,6 +848,17 @@ void QIBaseDriver::close()
     }
 }
 
+bool QIBaseDriver::ping()
+{
+    if ( !isOpen() ) {
+        return FALSE;
+    }
+
+    // FIXME
+    // Implement ping if available
+    return TRUE;
+}
+
 QSqlQuery QIBaseDriver::createQuery() const
 {
     return QSqlQuery(new QIBaseResult(this));

src/sql/drivers/ibase/qsql_ibase.h

@@ -94,6 +94,7 @@ public:
 	    const QString & host,
 	    int port ) { return open (db, user, password, host, port, QString()); }
     void close();
+    bool ping();
     QSqlQuery createQuery() const;
     bool beginTransaction();
     bool commitTransaction();

src/sql/drivers/mysql/qsql_mysql.cpp

@@ -504,6 +504,8 @@ bool QMYSQLDriver::open( const QString& db,
 	    optionFlags |= CLIENT_ODBC;
 	else if ( opt == "CLIENT_SSL" )
 	    optionFlags |= CLIENT_SSL;
+	else if ( opt == "MYSQL_OPT_RECONNECT" )
+	    optionFlags |= MYSQL_OPT_RECONNECT;
 	else 
 	    qWarning( "QMYSQLDriver::open: Unknown connect option '%s'", (*it).latin1() );
     }
@@ -544,6 +546,21 @@ void QMYSQLDriver::close()
     }
 }
 
+bool QMYSQLDriver::ping()
+{
+    if ( !isOpen() ) {
+        return FALSE;
+    }
+
+    if (mysql_ping( d->mysql )) {
+	return TRUE;
+    }
+    else {
+	setLastError( qMakeError("Unable to execute ping", QSqlError::Statement, d ) );
+	return FALSE;
+    }
+}
+
 QSqlQuery QMYSQLDriver::createQuery() const
 {
     return QSqlQuery( new QMYSQLResult( this ) );

src/sql/drivers/mysql/qsql_mysql.h

@@ -100,6 +100,7 @@ public:
 			      const QString & host = QString::null,
 			      int port = -1 );
     void		close();
+    bool		ping();
     QSqlQuery		createQuery() const;
     QStringList		tables( const QString& user ) const;
     QSqlIndex		primaryIndex( const QString& tablename ) const;

src/sql/drivers/odbc/qsql_odbc.cpp

@@ -1490,6 +1490,13 @@ void QODBCDriver::close()
     setOpenError( FALSE );
 }
 
+bool QODBCDriver::ping()
+{
+    // FIXME
+    // Implement ping if supported
+    return TRUE;
+}
+
 void QODBCDriver::cleanup()
 {
     SQLRETURN r;

src/sql/drivers/odbc/qsql_odbc.h

@@ -128,6 +128,7 @@ public:
 			      const QString & host = QString::null,
 			      int port = -1 );
     void		close();
+    bool		ping();
     QSqlQuery		createQuery() const;
     QStringList		tables( const QString& user ) const;
     QSqlRecord		record( const QString& tablename ) const;

src/sql/drivers/psql/qsql_psql.cpp

@@ -679,6 +679,29 @@ void QPSQLDriver::close()
     }
 }
 
+bool QPSQLDriver::ping()
+{
+    if ( !isOpen() ) {
+        return FALSE;
+    }
+
+    PGresult *res = NULL;
+
+    // Send ping
+    res = PQexec( d->connection, "" );
+    PQclear(res);
+
+    // Check connection status
+    if ( PQstatus( d->connection ) != CONNECTION_OK ) {
+	PQreset( d->connection );
+	if ( PQstatus( d->connection ) != CONNECTION_OK ) {
+	    setLastError( qMakeError("Unable to execute ping", QSqlError::Statement, d ) );
+	    return FALSE;
+	}
+    }
+    return TRUE;
+}
+
 QSqlQuery QPSQLDriver::createQuery() const
 {
     return QSqlQuery( new QPSQLResult( this, d ) );

src/sql/drivers/psql/qsql_psql.h

@@ -98,6 +98,7 @@ public:
 				const QString & host = QString::null,
 				int port = -1 );
     void		close();
+    bool		ping();
     QSqlQuery		createQuery() const;
     QStringList		tables( const QString& user ) const;
     QSqlIndex		primaryIndex( const QString& tablename ) const;

src/sql/drivers/sqlite/qsql_sqlite.cpp

@@ -352,6 +352,17 @@ void QSQLiteDriver::close()
     }
 }
 
+bool QSQLiteDriver::ping()
+{
+    if ( !isOpen() ) {
+        return FALSE;
+    }
+
+    // FIXME
+    // Implement ping if available
+    return TRUE;
+}
+
 QSqlQuery QSQLiteDriver::createQuery() const
 {
     return QSqlQuery(new QSQLiteResult(this));

src/sql/drivers/sqlite/qsql_sqlite.h

@@ -72,6 +72,7 @@ public:
 	    const QString & host,
 	    int port ) { return open (db, user, password, host, port, QString()); }
     void close();
+    bool ping();
     QSqlQuery createQuery() const;
     bool beginTransaction();
     bool commitTransaction();

src/sql/drivers/sqlite3/qsql_sqlite3.cpp

@@ -336,6 +336,17 @@ void QSQLite3Driver::close()
     }
 }
 
+bool QSQLite3Driver::ping()
+{
+    if ( !isOpen() ) {
+        return FALSE;
+    }
+
+    // FIXME
+    // Implement ping if available
+    return TRUE;
+}
+
 QSqlQuery QSQLite3Driver::createQuery() const
 {
     return QSqlQuery(new QSQLite3Result(this));

src/sql/drivers/sqlite3/qsql_sqlite3.h

@@ -72,6 +72,7 @@ public:
                const QString & host,
                int port ) { return open (db, user, password, host, port, QString()); }
     void close();
+    bool ping();
     QSqlQuery createQuery() const;
     bool beginTransaction();
     bool commitTransaction();

src/sql/qsqldatabase.cpp

@@ -144,6 +144,7 @@ public:
 	return FALSE;
     }
     void    close() {}
+    bool    ping() { return TRUE; }
     QSqlQuery createQuery() const { return QSqlQuery( new QNullResult(this) ); }
 };
 
@@ -795,6 +796,15 @@ void QSqlDatabase::close()
     d->driver->close();
 }
 
+/*!
+    Sends a ping to the database server.
+*/
+
+bool QSqlDatabase::ping()
+{
+    return d->driver->ping();
+}
+
 /*!
     Returns TRUE if the database connection is currently open;
     otherwise returns FALSE.

src/sql/qsqldatabase.h

@@ -95,6 +95,7 @@ public:
     bool		open();
     bool		open( const QString& user, const QString& password );
     void		close();
+    bool		ping();
     bool		isOpen() const;
     bool		isOpenError() const;
     QStringList		tables() const;

src/sql/qsqldriver.h

@@ -98,6 +98,7 @@ public:
 				      const QString & host = QString::null,
 				      int port = -1 ) = 0;
     virtual void		close() = 0;
+    virtual bool		ping() = 0;
     virtual QSqlQuery		createQuery() const = 0;
 
     // ### remove for 4.0