greptimedb/mito2/worker/handle_alter/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="Handling alter related requests."><title>mito2::worker::handle_alter - 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 handle_alter</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 handle_<wbr>alter</a></h2><h3><a href="#functions">Module Items</a></h3><ul class="block"><li><a href="#functions" title="Functions">Functions</a></li></ul></section><div id="rustdoc-modnav"><h2><a href="../index.html">In mito2::<wbr>worker</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">worker</a></div><h1>Module <span>handle_<wbr>alter</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/worker/handle_alter.rs.html#15-784">Source</a> </span></div><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Handling alter related requests.</p>
</div></details><h2 id="functions" class="section-header">Functions<a href="#functions" class="anchor">§</a></h2><dl class="item-table"><dt><a class="fn" href="fn.log_option_update.html" title="fn mito2::worker::handle_alter::log_option_update">log_<wbr>option_<wbr>update</a><span title="Restricted Visibility">&nbsp;🔒</span> </dt><dt><a class="fn" href="fn.log_time_index_widening_overflow.html" title="fn mito2::worker::handle_alter::log_time_index_widening_overflow">log_<wbr>time_<wbr>index_<wbr>widening_<wbr>overflow</a><span title="Restricted Visibility">&nbsp;🔒</span> </dt><dd>Logs a time index unit widening whose rescaled values would overflow the
target unit’s <code>i64</code> range in existing data. Memtables are flushed before
an alter, so each SST’s time range bounds its values; overflowing values
cast to NULL on read, which is deemed acceptable.</dd><dt><a class="fn" href="fn.metadata_after_alteration.html" title="fn mito2::worker::handle_alter::metadata_after_alteration">metadata_<wbr>after_<wbr>alteration</a><span title="Restricted Visibility">&nbsp;🔒</span> </dt><dd>Creates a metadata after applying the alter <code>request</code> to the old <code>metadata</code>.</dd><dt><a class="fn" href="fn.need_change_index.html" title="fn mito2::worker::handle_alter::need_change_index">need_<wbr>change_<wbr>index</a><span title="Restricted Visibility">&nbsp;🔒</span> </dt><dd>Used to determine whether we can build index directly after schema change.</dd><dt><a class="fn" href="fn.new_region_options_on_empty_memtable.html" title="fn mito2::worker::handle_alter::new_region_options_on_empty_memtable">new_<wbr>region_<wbr>options_<wbr>on_<wbr>empty_<wbr>memtable</a><span title="Restricted Visibility">&nbsp;🔒</span> </dt><dd>Returns the new region options if there are updates to the options.</dd><dt><a class="fn" href="fn.parse_usize_with_default.html" title="fn mito2::worker::handle_alter::parse_usize_with_default">parse_<wbr>usize_<wbr>with_<wbr>default</a><span title="Restricted Visibility">&nbsp;🔒</span> </dt><dt><a class="fn" href="fn.set_twcs_options.html" title="fn mito2::worker::handle_alter::set_twcs_options">set_<wbr>twcs_<wbr>options</a><span title="Restricted Visibility">&nbsp;🔒</span> </dt><dt><a class="fn" href="fn.skip_wal_value.html" title="fn mito2::worker::handle_alter::skip_wal_value">skip_<wbr>wal_<wbr>value</a><span title="Restricted Visibility">&nbsp;🔒</span> </dt><dt><a class="fn" href="fn.validate_skip_wal_change.html" title="fn mito2::worker::handle_alter::validate_skip_wal_change">validate_<wbr>skip_<wbr>wal_<wbr>change</a><span title="Restricted Visibility">&nbsp;🔒</span> </dt></dl></section></div></main></body></html>