<!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="Contains column reader API."><title>parquet::column::reader - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-46f98efaafac5295.ttf.woff2,FiraSans-Regular-018c141bf0843ffd.woff2,FiraSans-Medium-8f9a781e4970d388.woff2,SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2,SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../../static.files/rustdoc-dd39b87e5fcfba68.css"><meta name="rustdoc-vars" data-root-path="../../../" data-static-root-path="../../../static.files/" data-current-crate="parquet" data-themes="" data-resource-suffix="" data-rustdoc-version="1.81.0-nightly (8337ba918 2024-06-12)" data-channel="nightly" data-search-js="search-0fe7219eb170c82e.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../../../static.files/storage-118b08c4c78b968e.js"></script><script defer src="../sidebar-items.js"></script><script defer src="../../../static.files/main-20a3ad099b048cf2.js"></script><noscript><link rel="stylesheet" href="../../../static.files/noscript-df360f571f6edeae.css"></noscript><link rel="alternate icon" type="image/png" href="../../../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../../../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc mod"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle" title="show sidebar"></button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../../parquet/index.html">parquet</a><span class="version">52.0.0</span></h2></div><h2 class="location"><a href="#">Module reader</a></h2><div class="sidebar-elems"><section><ul class="block"><li><a href="#modules">Modules</a></li><li><a href="#structs">Structs</a></li><li><a href="#enums">Enums</a></li><li><a href="#functions">Functions</a></li><li><a href="#types">Type Aliases</a></li></ul></section><h2><a href="../index.html">In parquet::column</a></h2></div></nav><div class="sidebar-resizer"></div><main><div class="width-limiter"><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><h1>Module <a href="../../index.html">parquet</a>::<wbr><a href="../index.html">column</a>::<wbr><a class="mod" href="#">reader</a><button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><span class="out-of-band"><a class="src" href="../../../src/parquet/column/reader.rs.html#18-1345">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>&#x2212;</span>]</button></span></div><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Contains column reader API.</p>
</div></details><h2 id="modules" class="section-header">Modules<a href="#modules" class="anchor">§</a></h2><ul class="item-table"><li><div class="item-name"><a class="mod" href="decoder/index.html" title="mod parquet::column::reader::decoder">decoder</a><span title="Restricted Visibility">&nbsp;🔒</span> </div></li></ul><h2 id="structs" class="section-header">Structs<a href="#structs" class="anchor">§</a></h2><ul class="item-table"><li><div class="item-name"><a class="struct" href="struct.GenericColumnReader.html" title="struct parquet::column::reader::GenericColumnReader">GenericColumnReader</a></div><div class="desc docblock-short">Reads data for a given column chunk, using the provided decoders:</div></li></ul><h2 id="enums" class="section-header">Enums<a href="#enums" class="anchor">§</a></h2><ul class="item-table"><li><div class="item-name"><a class="enum" href="enum.ColumnReader.html" title="enum parquet::column::reader::ColumnReader">ColumnReader</a></div><div class="desc docblock-short">Column reader for a Parquet type.</div></li></ul><h2 id="functions" class="section-header">Functions<a href="#functions" class="anchor">§</a></h2><ul class="item-table"><li><div class="item-name"><a class="fn" href="fn.get_column_reader.html" title="fn parquet::column::reader::get_column_reader">get_column_reader</a></div><div class="desc docblock-short">Gets a specific column reader corresponding to column descriptor <code>col_descr</code>. The
column reader will read from pages in <code>col_page_reader</code>.</div></li><li><div class="item-name"><a class="fn" href="fn.get_typed_column_reader.html" title="fn parquet::column::reader::get_typed_column_reader">get_typed_column_reader</a></div><div class="desc docblock-short">Gets a typed column reader for the specific type <code>T</code>, by “up-casting” <code>col_reader</code> of
non-generic type to a generic column reader type <code>ColumnReaderImpl</code>.</div></li><li><div class="item-name"><a class="fn" href="fn.parse_v1_level.html" title="fn parquet::column::reader::parse_v1_level">parse_v1_level</a><span title="Restricted Visibility">&nbsp;🔒</span> </div></li></ul><h2 id="types" class="section-header">Type Aliases<a href="#types" class="anchor">§</a></h2><ul class="item-table"><li><div class="item-name"><a class="type" href="type.ColumnReaderImpl.html" title="type parquet::column::reader::ColumnReaderImpl">ColumnReaderImpl</a></div><div class="desc docblock-short">Typed value reader for a particular primitive column.</div></li></ul></section></div></main></body></html>