* promql: histogram_fraction for bucket histograms
This PR extends the histogram_fraction function to also work with classic bucket histograms. This is beneficial because it allows expressions like sum(increase(my_bucket{le="0.5"}[10m]))/sum(increase(my_total[10m])) to be written without knowing the actual values of the "le" label, easing the transition to native histograms later on.
It also feels natural since histogram_quantile also can deal with classic histograms.
Signed-off-by: Michael Hoffmann <mhoffmann@cloudflare.com>
* promql: histogram_fraction for bucket histograms
* Add documentation and reduce code duplication
* Fix a bug in linear interpolation between bucket boundaries
* Add more PromQL tests
Signed-off-by: Michael Hoffmann <mhoffmann@cloudflare.com>
* Update docs/querying/functions.md
Co-authored-by: Björn Rabenstein <github@rabenste.in>
Signed-off-by: Michael Hoffmann <mhoffm@posteo.de>
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Signed-off-by: Michael Hoffmann <mhoffmann@cloudflare.com>
Signed-off-by: Michael Hoffmann <mhoffm@posteo.de>
Co-authored-by: Björn Rabenstein <github@rabenste.in>
These are supported in the main prometheus binary but the feature flags
weren't supported in promtool.
Fixes#16412.
Signed-off-by: David Leadbeater <dgl@dgl.cx>
Updated the parser to allow calculations in PromQL durations.
This enables durations in the form of:
rate(http_requests_total[10m+2s])
The computation of the calculations is done directly at the parse level and does not hit the PromQL Engine.
The lexer has also been updated and improved, in particular for subqueries.
Buxfix: rate(http_requests_total[0]) is no longer allowed.
Signed-off-by: Julien Pivotto <291750+roidelapluie@users.noreply.github.com>
Global and Data Source configurations can specify legacy mode, but Prometheus now requires that the overall validation mode be set to UTF-8
Signed-off-by: Owen Williams <owen.williams@grafana.com>
promql: return NaN from `irate()` if either of last two samples is NaN
Signed-off-by: Charles Korn <charles.korn@grafana.com>
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Signed-off-by: Charles Korn <charles.korn@grafana.com>
promql: fix double quoting in invalid label name error from `count_values`
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Signed-off-by: Charles Korn <charles.korn@grafana.com>
Signed-off-by: Charles Korn <charleskorn@users.noreply.github.com>
Co-authored-by: Björn Rabenstein <github@rabenste.in>
Fix duplicate output vector if delayed name removal is disabled
This error is emitted in cleanupMetricLabels, but is skipped if
enableDelayedNameRemoval is false.
This makes it consistent with label_replace
Signed-off-by: Joshua Hesketh <josh@nitrotech.org>
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Signed-off-by: Joshua Hesketh <josh@nitrotech.org>
Signed-off-by: Björn Rabenstein <github@rabenste.in>
Co-authored-by: Björn Rabenstein <github@rabenste.in>
A `HistogramTestExpression` was missed in one case, which made the
formatting weird in case a histogram got unexpectedly returned.
Signed-off-by: beorn7 <beorn@grafana.com>
If a rate (or increase) is calculated on native histograms, and there
is a counter reset between the 1st and 2nd histogram, we never have to
touch the 1st histogram, so it doesn't even matter if it has an
incompatible bucket layout. So we should not error out in that case.
This simply nulls out the 1st histogram in that case.
Signed-off-by: beorn7 <beorn@grafana.com>
