feat(alerting): added clear history button to alert state history view, #6244

pkg/services/annotations/annotations.go

@@ -5,6 +5,7 @@ import "github.com/grafana/grafana/pkg/components/simplejson"
 type Repository interface {
 	Save(item *Item) error
 	Find(query *ItemQuery) ([]*Item, error)
+	Delete(params *DeleteParams) error
 }
 
 type ItemQuery struct {
@@ -20,6 +21,12 @@ type ItemQuery struct {
 	Limit int64 `json:"alertId"`
 }
 
+type DeleteParams struct {
+	AlertId     int64 `json:"alertId"`
+	DashboardId int64 `json:"dashboardId"`
+	PanelId     int64 `json:"panelId"`
+}
+
 var repositoryInstance Repository
 
 func GetRepository() Repository {

pkg/services/sqlstore/annotation.go

@@ -84,3 +84,17 @@ func (r *SqlAnnotationRepo) Find(query *annotations.ItemQuery) ([]*annotations.I
 
 	return items, nil
 }
+
+func (r *SqlAnnotationRepo) Delete(params *annotations.DeleteParams) error {
+	return inTransaction(func(sess *xorm.Session) error {
+
+		sql := "DELETE FROM annotation WHERE dashboard_id = ? AND panel_id = ?"
+
+		_, err := sess.Exec(sql, params.DashboardId, params.PanelId)
+		if err != nil {
+			return err
+		}
+
+		return nil
+	})
+}