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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="Expression split utilities for partition rules."><title>partition::utils::split - 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-17e0aaed.css"><meta name="rustdoc-vars" data-root-path="../../../" data-static-root-path="../../../static.files/" data-current-crate="partition" data-themes="" data-resource-suffix="" data-rustdoc-version="1.96.0-nightly (ac7f9ec7d 2026-03-20)" data-channel="nightly" data-search-js="search-63369b7b.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-5013f961.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 split</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../../partition/index.html">partition</a><span class="version">1.0.0-rc.2</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Module split</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="#enums" title="Enums">Enums</a></li><li><a href="#functions" title="Functions">Functions</a></li></ul></section><div id="rustdoc-modnav"><h2><a href="../index.html">In partition::<wbr>utils</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">partition</a>::<wbr><a href="../index.html">utils</a></div><h1>Module <span>split</span> <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/partition/utils/split.rs.html#15-1263">Source</a> </span></div><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Expression split utilities for partition rules.</p>
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<p>This module provides a conservative way to split one partition expression <code>R</code>
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by a split expression <code>S</code> into:</p>
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<ul>
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<li><code>left = R AND S</code></li>
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<li><code>right = R AND NOT(S)</code></li>
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</ul>
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<p>The implementation intentionally reuses existing partition components
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(<code>Collider</code>, <code>simplify</code>, <code>PartitionChecker</code>) and degrades to no-split when an
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unsupported shape/type is encountered.</p>
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</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.CollectedConjunction.html" title="struct partition::utils::split::CollectedConjunction">Collected<wbr>Conjunction</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="struct" href="struct.LowerBound.html" title="struct partition::utils::split::LowerBound">Lower<wbr>Bound</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="struct" href="struct.UpperBound.html" title="struct partition::utils::split::UpperBound">Upper<wbr>Bound</a><span title="Restricted Visibility"> 🔒</span> </dt></dl><h2 id="enums" class="section-header">Enums<a href="#enums" class="anchor">§</a></h2><dl class="item-table"><dt><a class="enum" href="enum.ExprSplitDegradeReason.html" title="enum partition::utils::split::ExprSplitDegradeReason">Expr<wbr>Split<wbr>Degrade<wbr>Reason</a></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.atom_col_op_val.html" title="fn partition::utils::split::atom_col_op_val">atom_<wbr>col_<wbr>op_<wbr>val</a><span title="Restricted Visibility"> 🔒</span> </dt><dd>Extracts <code>(column, op, value)</code> from a canonicalized atomic expression.</dd><dt><a class="fn" href="fn.collect_and_atoms.html" title="fn partition::utils::split::collect_and_atoms">collect_<wbr>and_<wbr>atoms</a><span title="Restricted Visibility"> 🔒</span> </dt><dd>Flattens an expression into atomic terms when it is a pure conjunction tree.</dd><dt><a class="fn" href="fn.collect_conjunction_bounds.html" title="fn partition::utils::split::collect_conjunction_bounds">collect_<wbr>conjunction_<wbr>bounds</a><span title="Restricted Visibility"> 🔒</span> </dt><dd>Collects per-column bounds and passthrough atoms from a pure <code>AND</code> tree.</dd><dt><a class="fn" href="fn.discrete_value_index.html" title="fn partition::utils::split::discrete_value_index">discrete_<wbr>value_<wbr>index</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="fn" href="fn.fold_and_exprs.html" title="fn partition::utils::split::fold_and_exprs">fold_<wbr>and_<wbr>exprs</a><span title="Restricted Visibility"> 🔒</span> </dt><dd>Folds a list of expressions into a left-associated AND tree.
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Returns <code>None</code> if the input list is empty.</dd><dt><a class="fn" href="fn.is_atomic_range_expr.html" title="fn partition::utils::split::is_atomic_range_expr">is_<wbr>atomic_<wbr>range_<wbr>expr</a><span title="Restricted Visibility"> 🔒</span> </dt><dd>Returns whether <code>expr</code> is an atomic <code>column op value</code> range predicate.</dd><dt><a class="fn" href="fn.is_domain_max_value.html" title="fn partition::utils::split::is_domain_max_value">is_<wbr>domain_<wbr>max_<wbr>value</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="fn" href="fn.is_empty_and_conjunction.html" title="fn partition::utils::split::is_empty_and_conjunction">is_<wbr>empty_<wbr>and_<wbr>conjunction</a><span title="Restricted Visibility"> 🔒</span> </dt><dd>Detects whether a pure conjunction expression is definitely unsatisfiable.</dd><dt><a class="fn" href="fn.is_infinite_value.html" title="fn partition::utils::split::is_infinite_value">is_<wbr>infinite_<wbr>value</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="fn" href="fn.is_nan_value.html" title="fn partition::utils::split::is_nan_value">is_<wbr>nan_<wbr>value</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="fn" href="fn.is_strictly_greater_than_domain_max.html" title="fn partition::utils::split::is_strictly_greater_than_domain_max">is_<wbr>strictly_<wbr>greater_<wbr>than_<wbr>domain_<wbr>max</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="fn" href="fn.is_supported_value.html" title="fn partition::utils::split::is_supported_value">is_<wbr>supported_<wbr>value</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="fn" href="fn.negate_split_expr.html" title="fn partition::utils::split::negate_split_expr">negate_<wbr>split_<wbr>expr</a></dt><dd>Rewrites <code>NOT(expr)</code> into an equivalent <code>PartitionExpr</code> without introducing a unary NOT node.</dd><dt><a class="fn" href="fn.prefer_lower.html" title="fn partition::utils::split::prefer_lower">prefer_<wbr>lower</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="fn" href="fn.prefer_upper.html" title="fn partition::utils::split::prefer_upper">prefer_<wbr>upper</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="fn" href="fn.push_unique_expr.html" title="fn partition::utils::split::push_unique_expr">push_<wbr>unique_<wbr>expr</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="fn" href="fn.simplify_and_bounds.html" title="fn partition::utils::split::simplify_and_bounds">simplify_<wbr>and_<wbr>bounds</a><span title="Restricted Visibility"> 🔒</span> </dt><dd>Simplifies conjunction-only range predicates by keeping the tightest bounds per column.</dd><dt><a class="fn" href="fn.split_partition_expr.html" title="fn partition::utils::split::split_partition_expr">split_<wbr>partition_<wbr>expr</a></dt><dd>Splits one partition expression with a split predicate.</dd><dt><a class="fn" href="fn.update_lower_bound.html" title="fn partition::utils::split::update_lower_bound">update_<wbr>lower_<wbr>bound</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="fn" href="fn.update_upper_bound.html" title="fn partition::utils::split::update_upper_bound">update_<wbr>upper_<wbr>bound</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="fn" href="fn.validate_atomic.html" title="fn partition::utils::split::validate_atomic">validate_<wbr>atomic</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="fn" href="fn.validate_base_expr_shape.html" title="fn partition::utils::split::validate_base_expr_shape">validate_<wbr>base_<wbr>expr_<wbr>shape</a><span title="Restricted Visibility"> 🔒</span> </dt><dd>Validates that <code>base_expr</code> stays within the range-only split contract.</dd><dt><a class="fn" href="fn.validate_split_expr_shape.html" title="fn partition::utils::split::validate_split_expr_shape">validate_<wbr>split_<wbr>expr_<wbr>shape</a><span title="Restricted Visibility"> 🔒</span> </dt><dd>Validates that <code>split_expr</code> is a single atomic range predicate.</dd><dt><a class="fn" href="fn.validate_supported_expr.html" title="fn partition::utils::split::validate_supported_expr">validate_<wbr>supported_<wbr>expr</a></dt></dl></section></div></main></body></html> |