Allow to close the connection

reader/reader.go

@@ -33,7 +33,9 @@ func New(dsn string, sc slave.Config) (*Reader, error) {
 		return nil, errors.Annotate(err, "establish slave connection")
 	}
 
-	r := &Reader{conn: conn}
+	r := &Reader{
+		conn: conn,
+	}
 	r.initTableMap()
 
 	if err := conn.DisableChecksum(); err != nil {
@@ -129,6 +131,11 @@ func (r *Reader) ReadEvent() (*Event, error) {
 	return &evt, err
 }
 
+// Close underlying database connection.
+func (r *Reader) Close() error {
+	return r.conn.Close()
+}
+
 func (r *Reader) initTableMap() {
 	r.tableMap = make(map[uint64]binlog.TableDescription)
 }

reader/slave/slave_conn.go

@@ -155,6 +155,11 @@ func (c *Conn) SetVar(name, val string) error {
 	return c.conn.Exec(fmt.Sprintf("SET %s=%q", name, val))
 }
 
+// Close the connection.
+func (c *Conn) Close() error {
+	return c.conn.Close()
+}
+
 func (c *Conn) runCmd(data []byte) error {
 	err := c.conn.WritePacket(data)
 	if err != nil {