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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="API documentation for the Rust `reduce` mod in crate `flow`."><title>flow::compute::render::reduce - 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="flow" 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 reduce</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../../../flow/index.html">flow</a><span class="version">1.0.0</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Module reduce</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 flow::<wbr>compute::<wbr>render</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">flow</a>::<wbr><a href="../../index.html">compute</a>::<wbr><a href="../index.html">render</a></div><h1>Module <span>reduce</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/flow/compute/render/reduce.rs.html#15-1985">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.AccumOutput.html" title="struct flow::compute::render::reduce::AccumOutput">Accum<wbr>Output</a><span title="Restricted Visibility"> 🔒</span> </dt><dd>Accumulate the output of aggregation functions</dd><dt><a class="struct" href="struct.ReduceArrange.html" title="struct flow::compute::render::reduce::ReduceArrange">Reduce<wbr>Arrange</a></dt><dd>All arrange(aka state) used in reduce operator</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.batch_split_by_key_val.html" title="fn flow::compute::render::reduce::batch_split_by_key_val">batch_<wbr>split_<wbr>by_<wbr>key_<wbr>val</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="fn" href="fn.check_no_future_updates.html" title="fn flow::compute::render::reduce::check_no_future_updates">check_<wbr>no_<wbr>future_<wbr>updates</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="fn" href="fn.eval_distinct_aggrs.html" title="fn flow::compute::render::reduce::eval_distinct_aggrs">eval_<wbr>distinct_<wbr>aggrs</a><span title="Restricted Visibility"> 🔒</span> </dt><dd>Eval distinct aggregate functions with distinct input arrange</dd><dt><a class="fn" href="fn.eval_distinct_core.html" title="fn flow::compute::render::reduce::eval_distinct_core">eval_<wbr>distinct_<wbr>core</a><span title="Restricted Visibility"> 🔒</span> </dt><dd>return distinct rows(distinct by row’s key) from the input, but do not update the arrangement</dd><dt><a class="fn" href="fn.eval_simple_aggrs.html" title="fn flow::compute::render::reduce::eval_simple_aggrs">eval_<wbr>simple_<wbr>aggrs</a><span title="Restricted Visibility"> 🔒</span> </dt><dd>Eval simple aggregate functions with no distinct input</dd><dt><a class="fn" href="fn.from_accum_values_to_live_accums.html" title="fn flow::compute::render::reduce::from_accum_values_to_live_accums">from_<wbr>accum_<wbr>values_<wbr>to_<wbr>live_<wbr>accums</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="fn" href="fn.from_accums_to_offsetted_accum.html" title="fn flow::compute::render::reduce::from_accums_to_offsetted_accum">from_<wbr>accums_<wbr>to_<wbr>offsetted_<wbr>accum</a><span title="Restricted Visibility"> 🔒</span> </dt><dd>convert a list of accumulators to a vector of values with first value as offset of end of each accumulator</dd><dt><a class="fn" href="fn.from_val_to_slice_idx.html" title="fn flow::compute::render::reduce::from_val_to_slice_idx">from_<wbr>val_<wbr>to_<wbr>slice_<wbr>idx</a><span title="Restricted Visibility"> 🔒</span> </dt><dd>Convert a value to a list of slice index</dd><dt><a class="fn" href="fn.get_col_diffs.html" title="fn flow::compute::render::reduce::get_col_diffs">get_<wbr>col_<wbr>diffs</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="fn" href="fn.reduce_accum_subgraph.html" title="fn flow::compute::render::reduce::reduce_accum_subgraph">reduce_<wbr>accum_<wbr>subgraph</a><span title="Restricted Visibility"> 🔒</span> </dt><dd>eval accumulable reduce plan by eval aggregate function and reduce the result</dd><dt><a class="fn" href="fn.reduce_batch_subgraph.html" title="fn flow::compute::render::reduce::reduce_batch_subgraph">reduce_<wbr>batch_<wbr>subgraph</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="fn" href="fn.reduce_distinct_subgraph.html" title="fn flow::compute::render::reduce::reduce_distinct_subgraph">reduce_<wbr>distinct_<wbr>subgraph</a><span title="Restricted Visibility"> 🔒</span> </dt><dd>eval distinct reduce plan, output the distinct, and update the arrangement</dd><dt><a class="fn" href="fn.reduce_subgraph.html" title="fn flow::compute::render::reduce::reduce_subgraph">reduce_<wbr>subgraph</a><span title="Restricted Visibility"> 🔒</span> </dt><dd>reduce subgraph, reduce the input data into a single row
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output is concat from key and val</dd><dt><a class="fn" href="fn.split_rows_to_key_val.html" title="fn flow::compute::render::reduce::split_rows_to_key_val">split_<wbr>rows_<wbr>to_<wbr>key_<wbr>val</a><span title="Restricted Visibility"> 🔒</span> </dt><dd>split a row into key and val by evaluate the key and val plan</dd><dt><a class="fn" href="fn.update_reduce_distinct_arrange.html" title="fn flow::compute::render::reduce::update_reduce_distinct_arrange">update_<wbr>reduce_<wbr>distinct_<wbr>arrange</a><span title="Restricted Visibility"> 🔒</span> </dt><dd>eval distinct reduce plan, output the distinct, and update the arrangement</dd></dl></section></div></main></body></html> |