Support add sql result with Span

[songkane]

Describe the feature

Record sql result sometimes is necessart.

Such as
gormDB.Use(tracing.NewPlugin(tracing.WithResult))
then , recorad

if verbose && db.Statement.Dest != nil {
		v, err := json.Marshal(db.Statement.Dest)
		if err == nil {
                         pan.addEvent('sqlResult',*(*string)(unsafe.Pointer(&v)))
		} else {
                          error := fmt.Sprintf("could not marshal db.Statement.Dest: %v", err)
                           span.reocrdError('sqlResult',error)
		}
	}

Motivation

Related Issues