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#138 : Added absent_over_time support function #261

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#138 : Added absent_over_time support function #261

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10 changes: 10 additions & 0 deletions engine/engine_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -184,6 +184,16 @@ func TestQueriesAgainstOldEngine(t *testing.T) {
http_requests_total{pod="nginx-2"} -5+2x18`,
query: "abs(http_requests_total)",
},
{
name: "absent_over_time",
load: `load 30s
http_requests_total{pod="nginx-1"} 1+1x15
http_requests_total{pod="nginx-2"} 1+2x18
http_requests_total{pod="nginx-2"} 1+2x18
http_requests_total{pod="nginx-2"} 1+2x18
http_requests_total{pod="nginx-2"} 1+2x18`,
query: "absent_over_time(http_requests_total[30s])",
},
{
name: "ceil",
load: `load 30s
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7 changes: 7 additions & 0 deletions execution/function/functions.go
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Expand Up @@ -87,6 +87,13 @@ var Funcs = map[string]FunctionCall{
"deg": simpleFunc(func(v float64) float64 {
return v * 180 / math.Pi
}),
"absent_over_time": simpleFunc(func(v float64) float64 {
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i dont think the implementation works; this operator actually needs to be a source of new samples ( if there are no samples in the window ). only implemented as simpleFunc it can only transform preexisting samples. Can you take a look at my previous PR for the absent function? I had to introduce a new operator that actually produces new samples in that case. It might be possible to adapt this for the "_over_time" variant too, but it might be a bit harder because functions are pushed down into the matrix selector

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Okey sure!

if v > 0 {
return 0
} else {
return 1
}
}),
"sgn": simpleFunc(func(v float64) float64 {
var sign float64
if v > 0 {
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