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Similar to topk/bottomk, have sort/sort_desc put NaN at end.

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This makes topk and bottomk consistent with the sorting functions,
as per #1271.
This commit is contained in:
Brian Brazil 2015-12-30 14:06:51 +00:00
parent 60287319d3
commit bac1f28cad
3 changed files with 44 additions and 35 deletions
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11
promql/functions.go
View file

@ -170,16 +170,19 @@ func funcIrate(ev *evaluator, args Expressions) model.Value {
// === sort(node model.ValVector) Vector ===
func funcSort(ev *evaluator, args Expressions) model.Value {
byValueSorter := vectorByValueHeap(ev.evalVector(args[0]))
sort.Sort(byValueSorter)
// NaN should sort to the bottom, so take descending sort with NaN first and
// reverse it.
byValueSorter := vectorByReverseValueHeap(ev.evalVector(args[0]))
sort.Sort(sort.Reverse(byValueSorter))
return vector(byValueSorter)
}
// === sortDesc(node model.ValVector) Vector ===
func funcSortDesc(ev *evaluator, args Expressions) model.Value {
// NaN should sort to the bottom, so take ascending sort with NaN first and
// reverse it.
byValueSorter := vectorByValueHeap(ev.evalVector(args[0]))
sort.Sort(sort.Reverse(byValueSorter))
return vector(byValueSorter)
}
@ -201,6 +204,7 @@ func funcTopk(ev *evaluator, args Expressions) model.Value {
heap.Push(&topk, el)
}
}
// The heap keeps the lowest value on top, so reverse it.
sort.Sort(sort.Reverse(topk))
return vector(topk)
}
@ -223,6 +227,7 @@ func funcBottomk(ev *evaluator, args Expressions) model.Value {
heap.Push(&bottomk, el)
}
}
// The heap keeps the highest value on top, so reverse it.
sort.Sort(sort.Reverse(bottomk))
return vector(bottomk)
}

36
promql/testdata/functions.test vendored
View file

@ -236,3 +236,39 @@ eval_ordered instant at 50m bottomk(3, http_requests{job="api-server",group="pro
http_requests{job="api-server", instance="0", group="production"} 100
http_requests{job="api-server", instance="1", group="production"} 200
http_requests{job="api-server", instance="2", group="production"} NaN
# Tests for sort/sort_desc.
clear
load 5m
http_requests{job="api-server", instance="0", group="production"} 0+10x10
http_requests{job="api-server", instance="1", group="production"} 0+20x10
http_requests{job="api-server", instance="0", group="canary"} 0+30x10
http_requests{job="api-server", instance="1", group="canary"} 0+40x10
http_requests{job="api-server", instance="2", group="canary"} NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN
http_requests{job="app-server", instance="0", group="production"} 0+50x10
http_requests{job="app-server", instance="1", group="production"} 0+60x10
http_requests{job="app-server", instance="0", group="canary"} 0+70x10
http_requests{job="app-server", instance="1", group="canary"} 0+80x10
eval_ordered instant at 50m sort(http_requests)
http_requests{group="production", instance="0", job="api-server"} 100
http_requests{group="production", instance="1", job="api-server"} 200
http_requests{group="canary", instance="0", job="api-server"} 300
http_requests{group="canary", instance="1", job="api-server"} 400
http_requests{group="production", instance="0", job="app-server"} 500
http_requests{group="production", instance="1", job="app-server"} 600
http_requests{group="canary", instance="0", job="app-server"} 700
http_requests{group="canary", instance="1", job="app-server"} 800
http_requests{group="canary", instance="2", job="api-server"} NaN
eval_ordered instant at 50m sort_desc(http_requests)
http_requests{group="canary", instance="1", job="app-server"} 800
http_requests{group="canary", instance="0", job="app-server"} 700
http_requests{group="production", instance="1", job="app-server"} 600
http_requests{group="production", instance="0", job="app-server"} 500
http_requests{group="canary", instance="1", job="api-server"} 400
http_requests{group="canary", instance="0", job="api-server"} 300
http_requests{group="production", instance="1", job="api-server"} 200
http_requests{group="production", instance="0", job="api-server"} 100
http_requests{group="canary", instance="2", job="api-server"} NaN

32
promql/testdata/legacy.test vendored
View file

@ -133,38 +133,6 @@ eval instant at 50m rate(http_requests[25m]) * 25 * 60
{group="production", instance="1", job="api-server"} 100
{group="production", instance="1", job="app-server"} 300
eval_ordered instant at 50m sort(http_requests)
http_requests{group="production", instance="0", job="api-server"} 100
http_requests{group="production", instance="1", job="api-server"} 200
http_requests{group="canary", instance="0", job="api-server"} 300
http_requests{group="canary", instance="1", job="api-server"} 400
http_requests{group="production", instance="0", job="app-server"} 500
http_requests{group="production", instance="1", job="app-server"} 600
http_requests{group="canary", instance="0", job="app-server"} 700
http_requests{group="canary", instance="1", job="app-server"} 800
eval_ordered instant at 50m sort(0 / round(http_requests, 400) + http_requests)
{group="production", instance="0", job="api-server"} NaN
{group="production", instance="1", job="api-server"} 200
{group="canary", instance="0", job="api-server"} 300
{group="canary", instance="1", job="api-server"} 400
{group="production", instance="0", job="app-server"} 500
{group="production", instance="1", job="app-server"} 600
{group="canary", instance="0", job="app-server"} 700
{group="canary", instance="1", job="app-server"} 800
eval_ordered instant at 50m sort_desc(http_requests)
http_requests{group="canary", instance="1", job="app-server"} 800
http_requests{group="canary", instance="0", job="app-server"} 700
http_requests{group="production", instance="1", job="app-server"} 600
http_requests{group="production", instance="0", job="app-server"} 500
http_requests{group="canary", instance="1", job="api-server"} 400
http_requests{group="canary", instance="0", job="api-server"} 300
http_requests{group="production", instance="1", job="api-server"} 200
http_requests{group="production", instance="0", job="api-server"} 100
# Single-letter label names and values.
eval instant at 50m x{y="testvalue"}