greptimedb/mito2/compaction/last_non_null/index.html

<!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="API documentation for the Rust `last_non_null` mod in crate `mito2`."><title>mito2::compaction::last_non_null - 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="mito2" 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 last_non_null</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../../mito2/index.html">mito2</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 last_<wbr>non_<wbr>null</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 mito2::<wbr>compaction</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">mito2</a>::<wbr><a href="../index.html">compaction</a></div><h1>Module <span>last_<wbr>non_<wbr>null</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/mito2/compaction/last_non_null.rs.html#15-610">Source</a> </span></div><h2 id="structs" class="section-header">Structs<a href="#structs" class="anchor">§</a></h2><dl class="item-table"><dt><a class="struct" href="struct.LastNonNullPicker.html" title="struct mito2::compaction::last_non_null::LastNonNullPicker">Last<wbr>NonNull<wbr>Picker</a><span title="Restricted Visibility">&nbsp;🔒</span> </dt><dd>Picker for <a href="../../region/options/enum.MergeMode.html" title="enum mito2::region::options::MergeMode"><code>MergeMode::LastNonNull</code></a>.</dd></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.build_closed_outputs.html" title="fn mito2::compaction::last_non_null::build_closed_outputs">build_<wbr>closed_<wbr>outputs</a><span title="Restricted Visibility">&nbsp;🔒</span> </dt><dd>Each seed and snapshot file is consumed at most once. Absorbing a seed also
absorbs its disconnected members: a merge stream must never be split across
independently scheduled outputs.</dd><dt><a class="fn" href="fn.expand_closure.html" title="fn mito2::compaction::last_non_null::expand_closure">expand_<wbr>closure</a><span title="Restricted Visibility">&nbsp;🔒</span> </dt><dd>Expands one seed into its full merge closure: absorb every connected seed
and every overlapping snapshot file, transitively. Growing <code>output.inputs</code>
while iterating is what makes the expansion transitive.</dd><dt><a class="fn" href="fn.extend_inputs.html" title="fn mito2::compaction::last_non_null::extend_inputs">extend_<wbr>inputs</a><span title="Restricted Visibility">&nbsp;🔒</span> </dt><dd>Appends never-seen inputs and removes them from the overlap index so the
same file is neither expanded nor scheduled twice.</dd><dt><a class="fn" href="fn.inputs_precede_memtables.html" title="fn mito2::compaction::last_non_null::inputs_precede_memtables">inputs_<wbr>precede_<wbr>memtables</a><span title="Restricted Visibility">&nbsp;🔒</span> </dt><dd>Imported SSTs can be newer than pending writes. A merge must not attach an
old field to a sequence above an intermediate version left in a memtable.</dd></dl></section></div></main></body></html>