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Mimir query engine: add support for min_over_time, max_over_time, sum_over_time and avg_over_time
#8934
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Mimir query engine: add support for min_over_time, max_over_time, sum_over_time and avg_over_time
#8934
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2ce5275
Ensure non-name labels are retained in `count_over_time`, `last_over_…
charleskorn 294c807
Enable test cases for `min_over_time` and `max_over_time`
charleskorn 68408e7
Add `min_over_time` and `max_over_time`
charleskorn 07777fc
Add support for `sum_over_time`
charleskorn 28ff94c
Add support for `avg_over_time`
charleskorn 5bf52b4
Expand concurrent queries test to include new functions that support …
charleskorn dc3b6a9
Add changelog entry
charleskorn 20cc9cf
Fix typo in test
charleskorn a8e8b0e
Don't create unnecessary `FloatHistogram` instances in `avg_over_time`
charleskorn 82fe467
Add benchmarks
charleskorn 4de9410
Add test cases for combinations of infinity and NaN
charleskorn ae939cb
Explain why we need to copy histograms in `avg_over_time`
charleskorn b921558
Merge branch 'main' into charleskorn/more-over-time-functions
charleskorn 5702f1a
Use simpler and more accurate average calculation in `avg_over_time` …
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,23 @@ | ||
| // SPDX-License-Identifier: AGPL-3.0-only | ||
| // Provenance-includes-location: https://github.com/prometheus/prometheus/blob/main/promql/engine.go | ||
| // Provenance-includes-license: Apache-2.0 | ||
| // Provenance-includes-copyright: The Prometheus Authors | ||
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| package floats | ||
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| import "math" | ||
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| func KahanSumInc(inc, sum, c float64) (newSum, newC float64) { | ||
| t := sum + inc | ||
| switch { | ||
| case math.IsInf(t, 0): | ||
| c = 0 | ||
|
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| // Using Neumaier improvement, swap if next term larger than sum. | ||
| case math.Abs(sum) >= math.Abs(inc): | ||
| c += (sum - t) + inc | ||
| default: | ||
| c += (inc - t) + sum | ||
| } | ||
| return t, c | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,73 @@ | ||
| // SPDX-License-Identifier: AGPL-3.0-only | ||
| // Provenance-includes-location: https://github.com/prometheus/prometheus/blob/main/promql/functions_internal_test.go | ||
| // Provenance-includes-license: Apache-2.0 | ||
| // Provenance-includes-copyright: The Prometheus Authors | ||
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| package floats | ||
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| import ( | ||
| "fmt" | ||
| "math" | ||
| "testing" | ||
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| "github.com/stretchr/testify/require" | ||
| ) | ||
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| func TestKahanSumInc(t *testing.T) { | ||
| testCases := map[string]struct { | ||
| first float64 | ||
| second float64 | ||
| expected float64 | ||
| }{ | ||
| "+Inf + anything = +Inf": { | ||
| first: math.Inf(1), | ||
| second: 2.0, | ||
| expected: math.Inf(1), | ||
| }, | ||
| "-Inf + anything = -Inf": { | ||
| first: math.Inf(-1), | ||
| second: 2.0, | ||
| expected: math.Inf(-1), | ||
| }, | ||
| "+Inf + -Inf = NaN": { | ||
| first: math.Inf(1), | ||
| second: math.Inf(-1), | ||
| expected: math.NaN(), | ||
| }, | ||
| "NaN + anything = NaN": { | ||
| first: math.NaN(), | ||
| second: 2, | ||
| expected: math.NaN(), | ||
| }, | ||
| "NaN + Inf = NaN": { | ||
| first: math.NaN(), | ||
| second: math.Inf(1), | ||
| expected: math.NaN(), | ||
| }, | ||
| "NaN + -Inf = NaN": { | ||
| first: math.NaN(), | ||
| second: math.Inf(-1), | ||
| expected: math.NaN(), | ||
| }, | ||
| } | ||
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| runTest := func(t *testing.T, a, b, expected float64) { | ||
| t.Run(fmt.Sprintf("%v + %v = %v", a, b, expected), func(t *testing.T) { | ||
| sum, c := KahanSumInc(b, a, 0) | ||
| result := sum + c | ||
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| if math.IsNaN(expected) { | ||
| require.Truef(t, math.IsNaN(result), "expected result to be NaN, but got %v (from %v + %v)", result, sum, c) | ||
| } else { | ||
| require.Equalf(t, expected, result, "expected result to be %v, but got %v (from %v + %v)", expected, result, sum, c) | ||
| } | ||
| }) | ||
| } | ||
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| for name, testCase := range testCases { | ||
| t.Run(name, func(t *testing.T) { | ||
| runTest(t, testCase.first, testCase.second, testCase.expected) | ||
| runTest(t, testCase.second, testCase.first, testCase.expected) | ||
| }) | ||
| } | ||
| } |
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(nit)
It might be worth splitting out the
_over_timefunctions into their own test so we can check the common case of mixed metrics etc iterating over the function.There was a problem hiding this comment.
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I'm inclined to leave this as-is for the time being - until prometheus/prometheus#14609 is vendored into Mimir, we need to skip one of the
ratetest cases that would fall into this group of tests, and I don't think it's so bad that the tests are repeated.