| <!DOCTYPE HTML> |
| <html lang="en-US"> |
| <head> |
| <meta charset="UTF-8"> |
| <title>ORC Specification</title> |
| <meta name="viewport" content="width=device-width,initial-scale=1"> |
| <meta name="generator" content="Jekyll v4.3.4"> |
| <link rel="stylesheet" href="//fonts.googleapis.com/css?family=Lato:300,300italic,400,400italic,700,700italic,900"> |
| <link rel="stylesheet" href="/css/screen.css"> |
| <link rel="icon" type="image/x-icon" href="/favicon.ico"> |
| <!--[if lt IE 9]> |
| <script src="/js/html5shiv.min.js"></script> |
| <script src="/js/respond.min.js"></script> |
| <![endif]--> |
| <!-- Matomo --> |
| <script> |
| var _paq = window._paq = window._paq || []; |
| /* tracker methods like "setCustomDimension" should be called before "trackPageView" */ |
| _paq.push(["setDoNotTrack", true]); |
| _paq.push(["disableCookies"]); |
| _paq.push(['trackPageView']); |
| _paq.push(['enableLinkTracking']); |
| (function() { |
| var u="https://analytics.apache.org/"; |
| _paq.push(['setTrackerUrl', u+'matomo.php']); |
| _paq.push(['setSiteId', '68']); |
| var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0]; |
| g.async=true; g.src=u+'matomo.js'; s.parentNode.insertBefore(g,s); |
| })(); |
| </script> |
| <!-- End Matomo Code --> |
| </head> |
| |
| |
| <body class="wrap"> |
| <header role="banner"> |
| <nav class="mobile-nav show-on-mobiles"> |
| <ul> |
| <li class=""> |
| <a href="/">Home</a> |
| </li> |
| <li class=""> |
| <a href="/releases/"><span class="show-on-mobiles">Rel</span> |
| <span class="hide-on-mobiles">Releases</span></a> |
| </li> |
| <li class=""> |
| <a href="/docs/"><span class="show-on-mobiles">Doc</span> |
| <span class="hide-on-mobiles">Documentation</span></a> |
| </li> |
| <li class=""> |
| <a href="/talks/"><span class="show-on-mobiles">Talk</span> |
| <span class="hide-on-mobiles">Talks</span></a> |
| </li> |
| <li class=""> |
| <a href="/news/">News</a> |
| </li> |
| <li class=""> |
| <a href="/develop/"><span class="show-on-mobiles">Dev</span> |
| <span class="hide-on-mobiles">Develop</span></a> |
| </li> |
| <li class=""> |
| <a href="/help/">Help</a> |
| </li> |
| </ul> |
| |
| </nav> |
| <div class="grid"> |
| <div class="unit one-quarter center-on-mobiles"> |
| <h1> |
| <a href="/"> |
| <span class="sr-only">Apache ORC</span> |
| <img src="/img/logo.png" width="249" height="101" alt="ORC Logo"> |
| </a> |
| </h1> |
| </div> |
| <nav class="main-nav unit three-quarters hide-on-mobiles"> |
| <ul> |
| <li class=""> |
| <a href="/">Home</a> |
| </li> |
| <li class=""> |
| <a href="/releases/"><span class="show-on-mobiles">Rel</span> |
| <span class="hide-on-mobiles">Releases</span></a> |
| </li> |
| <li class=""> |
| <a href="/docs/"><span class="show-on-mobiles">Doc</span> |
| <span class="hide-on-mobiles">Documentation</span></a> |
| </li> |
| <li class=""> |
| <a href="/talks/"><span class="show-on-mobiles">Talk</span> |
| <span class="hide-on-mobiles">Talks</span></a> |
| </li> |
| <li class=""> |
| <a href="/news/">News</a> |
| </li> |
| <li class=""> |
| <a href="/develop/"><span class="show-on-mobiles">Dev</span> |
| <span class="hide-on-mobiles">Develop</span></a> |
| </li> |
| <li class=""> |
| <a href="/help/">Help</a> |
| </li> |
| </ul> |
| |
| </nav> |
| </div> |
| </header> |
| |
| |
| <section class="standalone"> |
| <div class="grid"> |
| |
| <div class="unit whole"> |
| <article> |
| <h1>ORC Specification</h1> |
| <p>There have been two released ORC file versions:</p> |
| |
| <ul> |
| <li><a href="ORCv0">ORC v0</a> was released in Hive 0.11.</li> |
| <li><a href="ORCv1">ORC v1</a> was released in Hive 0.12 and ORC 1.x.</li> |
| </ul> |
| |
| <p>Each version of the library will detect the format version and use |
| the appropriate reader. The library can also write the older versions |
| of the file format to ensure that users can write files that all of their |
| clusters can read correctly.</p> |
| |
| <p>We are working on a new version of the file format:</p> |
| |
| <ul> |
| <li><a href="ORCv2">ORC v2</a> is a work in progress and is rapidly evolving.</li> |
| </ul> |
| |
| </article> |
| </div> |
| |
| <div class="clear"></div> |
| |
| </div> |
| </section> |
| |
| |
| <footer role="contentinfo"> |
| <p style="margin-left: 20px; margin-right; 20px; text-align: center">The contents of this website are © 2025 |
| <a href="https://www.apache.org/">Apache Software Foundation</a> |
| under the terms of the <a |
| href="https://www.apache.org/licenses/LICENSE-2.0.html"> |
| Apache License v2</a>. Apache ORC and its logo are trademarks |
| of the Apache Software Foundation.</p> |
| </footer> |
| |
| <script> |
| var anchorForId = function (id) { |
| var anchor = document.createElement("a"); |
| anchor.className = "header-link"; |
| anchor.href = "#" + id; |
| anchor.innerHTML = "<span class=\"sr-only\">Permalink</span><i class=\"fa fa-link\"></i>"; |
| anchor.title = "Permalink"; |
| return anchor; |
| }; |
| |
| var linkifyAnchors = function (level, containingElement) { |
| var headers = containingElement.getElementsByTagName("h" + level); |
| for (var h = 0; h < headers.length; h++) { |
| var header = headers[h]; |
| |
| if (typeof header.id !== "undefined" && header.id !== "") { |
| header.appendChild(anchorForId(header.id)); |
| } |
| } |
| }; |
| |
| document.onreadystatechange = function () { |
| if (this.readyState === "complete") { |
| var contentBlock = document.getElementsByClassName("docs")[0] || document.getElementsByClassName("news")[0]; |
| if (!contentBlock) { |
| return; |
| } |
| for (var level = 1; level <= 6; level++) { |
| linkifyAnchors(level, contentBlock); |
| } |
| } |
| }; |
| </script> |
| |
| |
| </body> |
| </html> |
