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app/vmselect/promql: fill gaps with 0 in rate_over_sum
response when the last value before the selected time window isnt empty
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@ -516,6 +516,8 @@ func (rc *rollupConfig) doInternal(dstValues []float64, tsm *timeseriesMap, valu
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rfa.currTimestamp = tEnd
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if i > 0 {
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rfa.realPrevValue = values[i-1]
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} else {
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rfa.realPrevValue = nan
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}
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value := rc.Func(rfa)
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rfa.idx++
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@ -1093,15 +1095,19 @@ func rollupRateOverSum(rfa *rollupFuncArg) float64 {
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timestamps := rfa.timestamps
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prevTimestamp := rfa.prevTimestamp
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if math.IsNaN(rfa.prevValue) {
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if len(values) == 0 {
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if len(timestamps) == 0 {
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return nan
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}
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prevTimestamp = timestamps[0]
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values = values[1:]
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timestamps = timestamps[1:]
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}
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if len(values) == 0 {
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return nan
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if len(timestamps) == 0 {
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if math.IsNaN(rfa.prevValue) {
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return nan
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}
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// Assume that the value didn't change since rfa.prevValue.
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return 0
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}
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sum := float64(0)
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for _, v := range values {
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@ -1235,6 +1241,7 @@ func rollupDeltaInternal(rfa *rollupFuncArg, canUseRealPrevValue bool) float64 {
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}
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} else {
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prevValue = values[0]
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values = values[1:]
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}
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}
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if len(values) == 0 {
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