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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="PromQL `min` and `max` aggregation operators."><title>common_function::aggrs::extremum - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../../static.files/rustdoc-1ed95124.css"><meta name="rustdoc-vars" data-root-path="../../../" data-static-root-path="../../../static.files/" data-current-crate="common_function" data-themes="" data-resource-suffix="" data-rustdoc-version="1.98.1 (48a229cea 2026-09-01)" data-channel="1.98.1" data-search-js="search-9944d736.js" data-stringdex-js="stringdex-2da4960a.js" data-settings-js="settings-170eb4bf.js" ><script src="../../../static.files/storage-41dd4d93.js"></script><script defer src="../sidebar-items.js"></script><script defer src="../../../static.files/main-417ebf0a.js"></script><noscript><link rel="stylesheet" href="../../../static.files/noscript-f7c3ffd8.css"></noscript><link rel="alternate icon" type="image/png" href="../../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../../static.files/favicon-044be391.svg"></head><body class="rustdoc mod"><a class="skip-main-content" href="#main-content">Skip to main content</a><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">Module extremum</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../../common_function/index.html">common_<wbr>function</a><span class="version">1.4.0-alpha.0</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Module extremum</a></h2><h3><a href="#structs">Module Items</a></h3><ul class="block"><li><a href="#structs" title="Structs">Structs</a></li><li><a href="#functions" title="Functions">Functions</a></li></ul></section><div id="rustdoc-modnav"><h2><a href="../index.html">In common_<wbr>function::<wbr>aggrs</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content" tabindex="-1"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../../index.html">common_function</a>::<wbr><a href="../index.html">aggrs</a></div><h1>Module <span>extremum</span>&nbsp;<button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../../../src/common_function/aggrs/extremum.rs.html#15-259">Source</a> </span></div><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>PromQL <code>min</code> and <code>max</code> aggregation operators.</p>
<p>PromQL ignores NaN samples unless every sample of a group is NaN. DataFusion’s
<code>min</code>/<code>max</code> order NaN differently depending on the code path (its grouped
accumulator lets NaN replace the current value and be replaced by the next one),
so the result depends on the order of the input.</p>
</div></details><h2 id="structs" class="section-header">Structs<a href="#structs" class="anchor">§</a></h2><dl class="item-table"><dt><a class="struct" href="struct.Extremum.html" title="struct common_function::aggrs::extremum::Extremum">Extremum</a></dt><dd><code>max</code> or <code>min</code> with PromQL NaN semantics.</dd><dt><a class="struct" href="struct.ExtremumAccumulator.html" title="struct common_function::aggrs::extremum::ExtremumAccumulator">Extremum<wbr>Accumulator</a><span title="Restricted Visibility">&nbsp;🔒</span> </dt></dl><h2 id="functions" class="section-header">Functions<a href="#functions" class="anchor">§</a></h2><dl class="item-table"><dt><a class="fn" href="fn.fold.html" title="fn common_function::aggrs::extremum::fold">fold</a><span title="Restricted Visibility">&nbsp;🔒</span> </dt><dd>Folds <code>value</code> into <code>current</code> like Prometheus’ aggregation: a NaN is replaced by any
sample, and a NaN sample never replaces a number.</dd><dt><a class="fn" href="fn.groups_accumulator.html" title="fn common_function::aggrs::extremum::groups_accumulator">groups_<wbr>accumulator</a><span title="Restricted Visibility">&nbsp;🔒</span> </dt></dl></section></div></main></body></html>