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Support experimental promql functions #6307

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yeya24 opened this issue Nov 3, 2024 · 0 comments
Open

Support experimental promql functions #6307

yeya24 opened this issue Nov 3, 2024 · 0 comments
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component/querier difficulty/medium help wanted type/feature

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@yeya24
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yeya24 commented Nov 3, 2024 •
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Is your feature request related to a problem? Please describe.

Prometheus has a feature flag for experimental promql functions https://prometheus.io/docs/prometheus/latest/feature_flags/#experimental-promql-functions. Certain functions and aggregations are only available if the feature flag is enabled.

Cortex currently doesn't expose those promql functions as there is no way to enable the feature flag.

Current experimental functions:

  • sort_by_label
  • sort_by_label_desc
  • mad_over_time
  • info

Experimental aggregations:

  • limitk
  • limit_ratio

Describe the solution you'd like
Expose the feature flag in the query engine and implement those functions/aggregations if necessary.

It would be nice to also cover those functions in fuzz test to ensure correctness.
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