SQL: close rows to release connection (#97147)

* SQL: close rows to release connection

* dont return err from rows.Close()

pkg/services/accesscontrol/database/policies.go

@@ -42,6 +42,9 @@ func GetAccessPolicies(ctx context.Context, orgID int64, sql *session.SessionDB,
 	if err != nil {
 		return nil, err
 	}
+	defer func() {
+		_ = rows.Close()
+	}()
 
 	created := time.Now()
 	updated := time.Now()

pkg/services/playlist/playlistimpl/xorm_store.go

@@ -222,6 +222,11 @@ func (s *sqlStore) ListAll(ctx context.Context, orgId int64) ([]playlist.Playlis
 	if err != nil {
 		return nil, err
 	}
+
+	defer func() {
+		_ = rows.Close()
+	}()
+
 	for rows.Next() {
 		err = rows.Scan(&playlistId, &itemType, &itemValue)
 		if err != nil {

pkg/storage/unified/search/document.go

@@ -29,6 +29,11 @@ func (s *StandardDocumentBuilders) GetDocumentBuilders() ([]resource.DocumentBui
 			if err != nil {
 				return nil, err
 			}
+
+			defer func() {
+				_ = rows.Close()
+			}()
+
 			for rows.Next() {
 				info := &dashboard.DatasourceQueryResult{}
 				err = rows.Scan(&info.UID, &info.Type, &info.Name, &info.IsDefault)

pkg/storage/unified/sql/backend.go

@@ -146,6 +146,11 @@ func (b *backend) Namespaces(ctx context.Context) ([]string, error) {
 		if err != nil {
 			return err
 		}
+
+		defer func() {
+			_ = rows.Close()
+		}()
+
 		for rows.Next() {
 			var ns string
 			err = rows.Scan(&ns)
@@ -155,8 +160,7 @@ func (b *backend) Namespaces(ctx context.Context) ([]string, error) {
 			namespaces = append(namespaces, ns)
 		}
 
-		err = rows.Close()
-		return err
+		return nil
 	})
 
 	return namespaces, err
@@ -679,7 +683,7 @@ func (b *backend) poll(ctx context.Context, grp string, res string, since int64,
 		nextRV = rec.ResourceVersion
 		prevRV := rec.PreviousRV
 		if prevRV == nil {
-			*prevRV = int64(0)
+			prevRV = new(int64)
 		}
 		stream <- &resource.WrittenEvent{
 			WriteEvent: resource.WriteEvent{

pkg/storage/unified/sql/dbutil/dbutil.go

@@ -165,6 +165,10 @@ func Query[T any](ctx context.Context, x db.ContextExecer, tmpl *template.Templa
 		return nil, err
 	}
 
+	defer func() {
+		_ = rows.Close()
+	}()
+
 	var ret []T
 	for rows.Next() {
 		v, err := scanRow(rows, req)

pkg/storage/unified/sql/queries.go

@@ -101,7 +101,7 @@ func (r *sqlResourceHistoryPollRequest) Validate() error {
 func (r *sqlResourceHistoryPollRequest) Results() (*historyPollResponse, error) {
 	prevRV := r.Response.PreviousRV
 	if prevRV == nil {
-		*prevRV = int64(0)
+		prevRV = new(int64)
 	}
 	return &historyPollResponse{
 		Key: resource.ResourceKey{