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app/vmselect/promql: properly detect aggregate topk* and bottomk* aggregate functions in order to disable duplicate sorting

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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1189
This commit is contained in:
Aliaksandr Valialkin 2021-04-08 00:09:34 +03:00
parent cb12a8f0a8
commit d3fa0ccabd
2 changed files with 29 additions and 16 deletions
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16
app/vmselect/promql/aggr.go
View file

@ -618,7 +618,9 @@ func newAggrFuncTopK(isReverse bool) aggrFunc {
})
fillNaNsAtIdx(n, ks[n], tss)
}
return removeNaNs(tss)
tss = removeNaNs(tss)
reverseSeries(tss)
return tss
}
return aggrFuncExt(afe, args[1], &afa.ae.Modifier, afa.ae.Limit, true)
}
@ -683,7 +685,17 @@ func getRangeTopKTimeseries(tss []*timeseries, modifier *metricsql.ModifierExpr,
if remainingSumTS != nil {
tss = append(tss, remainingSumTS)
}
return removeNaNs(tss)
tss = removeNaNs(tss)
reverseSeries(tss)
return tss
}
func reverseSeries(tss []*timeseries) {
j := len(tss)
for i := 0; i < len(tss)/2; i++ {
j--
tss[i], tss[j] = tss[j], tss[i]
}
}
func getRemainingSumTimeseries(tss []*timeseries, modifier *metricsql.ModifierExpr, ks []float64, remainingSumTagName string) *timeseries {

29
app/vmselect/promql/exec.go
View file

@ -85,21 +85,22 @@ func Exec(ec *EvalConfig, q string, isFirstPointOnly bool) ([]netstorage.Result,
}
func maySortResults(e metricsql.Expr, tss []*timeseries) bool {
fe, ok := e.(*metricsql.FuncExpr)
if !ok {
return true
}
switch fe.Name {
case "sort", "sort_desc",
"sort_by_label", "sort_by_label_desc",
"topk", "bottomk",
"topk_max", "topk_min", "topk_avg", "topk_median",
"bottomk_max", "bottomk_min", "bottomk_avg", "bottomk_median",
"outliersk":
return false
default:
return true
switch v := e.(type) {
case *metricsql.FuncExpr:
switch strings.ToLower(v.Name) {
case "sort", "sort_desc",
"sort_by_label", "sort_by_label_desc":
return false
}
case *metricsql.AggrFuncExpr:
switch strings.ToLower(v.Name) {
case "topk", "bottomk", "outliersk",
"topk_max", "topk_min", "topk_avg", "topk_median",
"bottomk_max", "bottomk_min", "bottomk_avg", "bottomk_median":
return false
}
}
return true
}
func timeseriesToResult(tss []*timeseries, maySort bool) ([]netstorage.Result, error) {