[metricsql] for subqueries fixed behavior of functions that use query time range in their logic (like start, end, and running_*), from now on when using in subqueries they respect time range from query parameters (#5794)

app/vmselect/promql/eval.go

@@ -111,6 +111,11 @@ type EvalConfig struct {
 	End   int64
 	Step  int64
 
+	// RealStart contains the original start of the interval when executed in subqueries (because Start can be changed  for subqueries)
+	RealStart int64
+	// RealEnd contains the original end of the interval when executed in subqueries (because End can be changed for subqueries)
+	RealEnd int64
+
 	// MaxSeries is the maximum number of time series, which can be scanned by the query.
 	// Zero means 'no limit'
 	MaxSeries int
@@ -152,7 +157,17 @@ type EvalConfig struct {
 func copyEvalConfig(src *EvalConfig) *EvalConfig {
 	var ec EvalConfig
 	ec.Start = src.Start
+	if ec.RealStart > 0 {
+		ec.RealStart = src.RealStart
+	} else {
+		ec.RealStart = src.Start
+	}
 	ec.End = src.End
+	if ec.RealEnd > 0 {
+		ec.RealEnd = src.RealEnd
+	} else {
+		ec.RealEnd = src.End
+	}
 	ec.Step = src.Step
 	ec.MaxSeries = src.MaxSeries
 	ec.MaxPointsPerSeries = src.MaxPointsPerSeries

app/vmselect/promql/transform.go

@@ -1248,9 +1248,14 @@ func newTransformFuncRunning(rf func(a, b float64, idx int) float64) transformFu
 			prevValue := values[0]
 			values = values[1:]
 			for i, v := range values {
+				if tfa.ec.RealEnd > 0 && ts.Timestamps[i] > tfa.ec.RealEnd {
+					break
+				}
+				if ts.Timestamps[i] >= tfa.ec.RealStart {
 					if !math.IsNaN(v) {
 						prevValue = rf(prevValue, v, i+1)
 					}
+				}
 				values[i] = prevValue
 			}
 		}
@@ -1265,7 +1270,7 @@ func newTransformFuncRange(rf func(a, b float64, idx int) float64) transformFunc
 		if err != nil {
 			return nil, err
 		}
-		setLastValues(rvs)
+		setLastValues(tfa, rvs)
 		return rvs, nil
 	}
 }
@@ -1539,7 +1544,7 @@ func transformRangeQuantile(tfa *transformFuncArg) ([]*timeseries, error) {
 	}
 	a.A = values
 	putFloat64s(a)
-	setLastValues(rvs)
+	setLastValues(tfa, rvs)
 	return rvs, nil
 }
 
@@ -1554,9 +1559,14 @@ func transformRangeFirst(tfa *transformFuncArg) ([]*timeseries, error) {
 		if len(values) == 0 {
 			continue
 		}
+		vFirstSet := false
 		vFirst := values[0]
 		for i, v := range values {
-			if math.IsNaN(v) {
+			if !vFirstSet && ts.Timestamps[i] >= tfa.ec.RealStart {
+				vFirst = v
+				vFirstSet = true
+			}
+			if !vFirstSet && math.IsNaN(v) {
 				continue
 			}
 			values[i] = vFirst
@@ -1571,17 +1581,28 @@ func transformRangeLast(tfa *transformFuncArg) ([]*timeseries, error) {
 		return nil, err
 	}
 	rvs := args[0]
-	setLastValues(rvs)
+	setLastValues(tfa, rvs)
 	return rvs, nil
 }
 
-func setLastValues(tss []*timeseries) {
+func setLastValues(tfa *transformFuncArg, tss []*timeseries) {
 	for _, ts := range tss {
 		values := skipTrailingNaNs(ts.Values)
 		if len(values) == 0 {
 			continue
 		}
 		vLast := values[len(values)-1]
+		if tfa.ec.RealEnd > 0 {
+			for i := len(values) - 1; i >= 0; i-- {
+				if math.IsNaN(values[i]) {
+					continue
+				}
+				if ts.Timestamps[i] > tfa.ec.RealEnd {
+					continue
+				}
+				vLast = values[i]
+			}
+		}
 		for i, v := range values {
 			if math.IsNaN(v) {
 				continue
@@ -2713,11 +2734,17 @@ func transformStep(tfa *transformFuncArg) float64 {
 }
 
 func transformStart(tfa *transformFuncArg) float64 {
+	if tfa.ec.RealStart == 0 {
 		return float64(tfa.ec.Start) / 1e3
+	}
+	return float64(tfa.ec.RealStart) / 1e3
 }
 
 func transformEnd(tfa *transformFuncArg) float64 {
+	if tfa.ec.RealEnd == 0 {
 		return float64(tfa.ec.End) / 1e3
+	}
+	return float64(tfa.ec.RealEnd) / 1e3
 }
 
 // copyTimeseries returns a copy of tss.

docs/CHANGELOG.md

@@ -41,6 +41,7 @@ See also [LTS releases](https://docs.victoriametrics.com/LTS-releases.html).
 * BUGFIX: fix the misleading error `0ms is out of allowed range [0 ...` when passing `step=0` to [/api/v1/query](https://docs.victoriametrics.com/keyconcepts/#instant-query)
   or [/api/v1/query_range](https://docs.victoriametrics.com/keyconcepts/#range-query). See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5795).
 * BUGFIX: [vmalert](https://docs.victoriametrics.com/#vmalert): consistently sort groups by name and filename on `/groups` page in UI. This should prevent non-deterministic sorting for groups with identical names.
+* BUGFIX: [MetricsQL](https://docs.victoriametrics.com/MetricsQL.html): For subqueries fix behavior of functions that use query time range in their logic (like `start`, `end`, and `running_*`), from now on when using in subqueries they respect time range from query parameters. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5794) for details.
 
 ## [v1.98.0](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.98.0)