fix(meter): custom step interval support

frontend/src/container/MeterExplorer/Breakdown/graphs.ts

@@ -103,7 +103,7 @@ export const getTotalLogSizeWidgetData = (): Widgets =>
 					queryName: 'A',
 					reduceTo: ReduceOperators.SUM,
 					spaceAggregation: 'sum',
-					stepInterval: 60,
+					stepInterval: null,
 					timeAggregation: 'increase',
 				},
 			],
@@ -140,7 +140,7 @@ export const getTotalTraceSizeWidgetData = (): Widgets =>
 					queryName: 'A',
 					reduceTo: ReduceOperators.SUM,
 					spaceAggregation: 'sum',
-					stepInterval: 60,
+					stepInterval: null,
 					timeAggregation: 'increase',
 				},
 			],
@@ -177,7 +177,7 @@ export const getTotalMetricDatapointCountWidgetData = (): Widgets =>
 					queryName: 'A',
 					reduceTo: ReduceOperators.SUM,
 					spaceAggregation: 'sum',
-					stepInterval: 60,
+					stepInterval: null,
 					timeAggregation: 'increase',
 				},
 			],
@@ -214,7 +214,7 @@ export const getLogCountWidgetData = (): Widgets =>
 					queryName: 'A',
 					reduceTo: ReduceOperators.AVG,
 					spaceAggregation: 'sum',
-					stepInterval: 60,
+					stepInterval: null,
 					timeAggregation: 'increase',
 				},
 			],
@@ -251,7 +251,7 @@ export const getLogSizeWidgetData = (): Widgets =>
 					queryName: 'A',
 					reduceTo: ReduceOperators.AVG,
 					spaceAggregation: 'sum',
-					stepInterval: 60,
+					stepInterval: null,
 					timeAggregation: 'increase',
 				},
 			],
@@ -288,7 +288,7 @@ export const getSpanCountWidgetData = (): Widgets =>
 					queryName: 'A',
 					reduceTo: ReduceOperators.AVG,
 					spaceAggregation: 'sum',
-					stepInterval: 60,
+					stepInterval: null,
 					timeAggregation: 'increase',
 				},
 			],
@@ -325,7 +325,7 @@ export const getSpanSizeWidgetData = (): Widgets =>
 					queryName: 'A',
 					reduceTo: ReduceOperators.AVG,
 					spaceAggregation: 'sum',
-					stepInterval: 60,
+					stepInterval: null,
 					timeAggregation: 'increase',
 				},
 			],
@@ -362,7 +362,7 @@ export const getMetricCountWidgetData = (): Widgets =>
 					queryName: 'A',
 					reduceTo: ReduceOperators.AVG,
 					spaceAggregation: 'sum',
-					stepInterval: 60,
+					stepInterval: null,
 					timeAggregation: 'increase',
 				},
 			],

pkg/querier/querier.go

@@ -208,7 +208,18 @@ func (q *querier) QueryRange(ctx context.Context, orgID valuer.UUID, req *qbtype
 				event.GroupByApplied = len(spec.GroupBy) > 0
 
 				if spec.Source == telemetrytypes.SourceMeter {
-					spec.StepInterval = qbtypes.Step{Duration: time.Second * time.Duration(querybuilder.RecommendedStepIntervalForMeter(req.Start, req.End))}
+					if spec.StepInterval.Seconds() == 0 {
+						spec.StepInterval = qbtypes.Step{Duration: time.Second * time.Duration(querybuilder.RecommendedStepIntervalForMeter(req.Start, req.End))}
+					}
+
+					if spec.StepInterval.Seconds() < float64(querybuilder.MinAllowedStepIntervalForMeter(req.Start, req.End)) {
+						newStep := qbtypes.Step{
+							Duration: time.Second * time.Duration(querybuilder.MinAllowedStepIntervalForMeter(req.Start, req.End)),
+						}
+						// TODO[@vikrantgupta25]: add this warning after the issue for intelligent bar chart aggregations is fixed.
+						// intervalWarnings = append(intervalWarnings, fmt.Sprintf(intervalWarn, spec.Name, spec.StepInterval.Seconds(), newStep.Duration.Seconds()))
+						spec.StepInterval = newStep
+					}
 				} else {
 					if spec.StepInterval.Seconds() == 0 {
 						spec.StepInterval = qbtypes.Step{

pkg/querybuilder/time.go

@@ -89,6 +89,31 @@ func RecommendedStepIntervalForMeter(start, end uint64) uint64 {
 	return recommended
 }
 
+func MinAllowedStepIntervalForMeter(start, end uint64) uint64 {
+	start = ToNanoSecs(start)
+	end = ToNanoSecs(end)
+
+	step := (end - start) / RecommendedNumberOfPoints / 1e9
+
+	// for meter queries the minimum step interval allowed is 1 hour as this is our granularity
+	if step < 3600 {
+		return 3600
+	}
+
+	// return the nearest lower multiple of 3600 ( 1 hour )
+	minAllowed := step - step%3600
+
+	// if the time range is greater than 1 month set the step interval to be multiple of 1 day
+	if end-start >= uint64(30*24*time.Hour.Nanoseconds()) {
+		if minAllowed < 86400 {
+			minAllowed = 86400
+		} else {
+			minAllowed = uint64(math.Round(float64(minAllowed)/86400)) * 86400
+		}
+	}
+	return minAllowed
+}
+
 func RecommendedStepIntervalForMetric(start, end uint64) uint64 {
 	start = ToNanoSecs(start)
 	end = ToNanoSecs(end)