Align multiple series to the same interval with interpolation, fix #1211

pkg/datasource/zabbix.go

@@ -1,10 +1,11 @@
 package datasource
 
 import (
-	"github.com/alexanderzobnin/grafana-zabbix/pkg/timeseries"
 	"strings"
 	"time"
 
+	"github.com/alexanderzobnin/grafana-zabbix/pkg/timeseries"
+
 	"github.com/alexanderzobnin/grafana-zabbix/pkg/zabbix"
 	"github.com/grafana/grafana-plugin-sdk-go/backend"
 	"github.com/grafana/grafana-plugin-sdk-go/data"
@@ -123,6 +124,10 @@ func (ds *ZabbixDatasourceInstance) applyDataProcessing(ctx context.Context, que
 				}
 			}
 		}
+
+		if len(series) > 1 {
+			series = timeseries.AlignSeriesIntervals(series)
+		}
 	}
 
 	series, err := applyFunctions(series, query.Functions)