[TraceQL Metrics] histogram_over_time #3644
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… of metrics and hints
… end. Refactor label handling to be shared. Validate quantiles, support quantile_over_time by any integer attribute
…conditions on the same attribute
…oss blocks, and across generators. Error handling, move code around
…le_over_time test, code cleanup
…log2, for several reasons: support non-log2 or native histogram buckets in the future, and where queriers on different versions may have different buckets during rollout
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What this PR does:
Adds
histogram_over_time, requires merging #3633 first. This function supports the creation of heatmaps. Implementation and data flow is similar to quantiles but we preserve the bucket counts at the end. Internally it's executing a query{ } | count_over_time() by (log2(<field>)), but making it a new top-level function is straight-forward and more readable. Maybe long-term we do expand the language to allow grouping by a field expression (func(.foo)) instead of just attributes (.foo)Which issue(s) this PR fixes:
Fixes #
Checklist
CHANGELOG.mdupdated - the order of entries should be[CHANGE],[FEATURE],[ENHANCEMENT],[BUGFIX]