Alerting: fix ngalert alertmanager SQL Syntax Errors (#40827) (#40868)

* test kvstore in intregration tests with different databases

* escape 'key' in delete query

* export quote and use it in kvstore

(cherry picked from commit d1aefa1792)

Co-authored-by: Jean-Philippe Quéméner <JohnnyQQQQ@users.noreply.github.com>

pkg/infra/kvstore/kvstore_test.go

@@ -1,3 +1,6 @@
+//go:build integration
+// +build integration
+
 package kvstore
 
 import (

pkg/infra/kvstore/sql.go

@@ -2,6 +2,7 @@ package kvstore
 
 import (
 	"context"
+	"fmt"
 	"time"
 
 	"github.com/grafana/grafana/pkg/infra/log"
@@ -88,7 +89,8 @@ func (kv *kvStoreSQL) Set(ctx context.Context, orgId int64, namespace string, ke
 // Del deletes an item from the store.
 func (kv *kvStoreSQL) Del(ctx context.Context, orgId int64, namespace string, key string) error {
 	err := kv.sqlStore.WithDbSession(ctx, func(dbSession *sqlstore.DBSession) error {
-		_, err := dbSession.Exec("DELETE FROM kv_store WHERE org_id=? and namespace=? and key=?", orgId, namespace, key)
+		query := fmt.Sprintf("DELETE FROM kv_store WHERE org_id=? and namespace=? and %s=?", kv.sqlStore.Quote("key"))
+		_, err := dbSession.Exec(query, orgId, namespace, key)
 		return err
 	})
 	return err
@@ -99,7 +101,7 @@ func (kv *kvStoreSQL) Del(ctx context.Context, orgId int64, namespace string, ke
 func (kv *kvStoreSQL) Keys(ctx context.Context, orgId int64, namespace string, keyPrefix string) ([]Key, error) {
 	var keys []Key
 	err := kv.sqlStore.WithDbSession(ctx, func(dbSession *sqlstore.DBSession) error {
-		query := dbSession.Where("namespace = ?", namespace).And("\"key\" LIKE ?", keyPrefix+"%")
+		query := dbSession.Where("namespace = ?", namespace).And(fmt.Sprintf("%s LIKE ?", kv.sqlStore.Quote("key")), keyPrefix+"%")
 		if orgId != AllOrganizations {
 			query.And("org_id = ?", orgId)
 		}

pkg/services/sqlstore/sqlstore.go

@@ -157,6 +157,11 @@ func (ss *SQLStore) Reset() error {
 	return ss.ensureMainOrgAndAdminUser()
 }
 
+// Quote quotes the value in the used SQL dialect
+func (ss *SQLStore) Quote(value string) string {
+	return ss.engine.Quote(value)
+}
+
 func (ss *SQLStore) ensureMainOrgAndAdminUser() error {
 	ctx := context.Background()
 	err := ss.WithTransactionalDbSession(ctx, func(sess *DBSession) error {