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<title data-rh="true">Schema History | DataHub</title><meta data-rh="true" name="viewport" content="width=device-width,initial-scale=1"><meta data-rh="true" name="twitter:card" content="summary_large_image"><meta data-rh="true" property="og:url" content="https://docs.datahub.com/docs/schema-history"><meta data-rh="true" name="docusaurus_locale" content="en"><meta data-rh="true" name="docsearch:language" content="en"><meta data-rh="true" name="docusaurus_version" content="current"><meta data-rh="true" name="docusaurus_tag" content="docs-default-current"><meta data-rh="true" name="docsearch:version" content="current"><meta data-rh="true" name="docsearch:docusaurus_tag" content="docs-default-current"><meta data-rh="true" property="og:title" content="Schema History | DataHub"><meta data-rh="true" name="description" content="Schema History is a valuable tool for understanding how a Dataset changes over time and gives insight into the following cases,"><meta data-rh="true" property="og:description" content="Schema History is a valuable tool for understanding how a Dataset changes over time and gives insight into the following cases,"><link data-rh="true" rel="icon" href="/img/favicon.ico"><link data-rh="true" rel="canonical" href="https://docs.datahub.com/docs/schema-history"><link data-rh="true" rel="alternate" href="https://docs.datahub.com/docs/schema-history" hreflang="en"><link data-rh="true" rel="alternate" href="https://docs.datahub.com/docs/schema-history" hreflang="x-default"><link data-rh="true" rel="preconnect" href="https://RK0UG797F3-dsn.algolia.net" crossorigin="anonymous"><link rel="alternate" type="application/rss+xml" href="/learn/rss.xml" title="DataHub RSS Feed">
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.cloud-cta {
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font-weight: 600;
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animation: gradientShift 3s ease infinite;
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@keyframes gradientShift {
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0%, 100% { background-position: 0% 50%; }
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along with informing Data Practitioners when these changes happened.</p><ul><li>A new field is added</li><li>An existing field is removed</li><li>An existing field changes type</li></ul><p>Schema History uses DataHub's <a href="/docs/dev-guides/timeline/">Timeline API</a> to compute schema changes.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="schema-history-setup-prerequisites-and-permissions">Schema History Setup, Prerequisites, and Permissions<a href="#schema-history-setup-prerequisites-and-permissions" class="hash-link" aria-label="Direct link to Schema History Setup, Prerequisites, and Permissions" title="Direct link to Schema History Setup, Prerequisites, and Permissions"></a></h2><p>Schema History is viewable in the DataHub UI for any Dataset that has had at least one schema change. To view a Dataset, a user
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must have the <strong>View Entity Page</strong> privilege, or be assigned to <strong>any</strong> DataHub Role.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="using-schema-history">Using Schema History<a href="#using-schema-history" class="hash-link" aria-label="Direct link to Using Schema History" title="Direct link to Using Schema History"></a></h2><p>You can view the Schema History for a Dataset by navigating to that Dataset's Schema Tab. As long as that Dataset has more than
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one version, you can view what a Dataset looked like at any given version by using the version selector.
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Here's an example from DataHub's official Demo environment with the</p><a href="https://demo.datahub.com/dataset/urn:li:dataset:(urn:li:dataPlatform:snowflake,long_tail_companions.adoption.pets,PROD)/Schema?is_lineage_mode=false" target="_blank" rel="noopener noreferrer">Snowflake pets dataset</a>.<p align="center"><img loading="lazy" width="70%" src="https://raw.githubusercontent.com/datahub-project/static-assets/main/imgs/schema-history-latest-version.png" class="img_ev3q"></p><p>If you click on an older version in the selector, you'll be able to see what the schema looked like back then. Notice
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the changes here to the glossary terms for the <code>status</code> field, and to the descriptions for the <code>created_at</code> and <code>updated_at</code>
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fields.</p><p align="center"><img loading="lazy" width="70%" src="https://raw.githubusercontent.com/datahub-project/static-assets/main/imgs/schema-history-older-version.png" class="img_ev3q"></p><p>In addition to this, you can also toggle the Audit view that shows you when the most recent changes were made to each field.
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You can active this by clicking on the Audit icon you see above the top right of the table.</p><p align="center"><img loading="lazy" width="70%" src="https://raw.githubusercontent.com/datahub-project/static-assets/main/imgs/schema-history-audit-activated.png" class="img_ev3q"></p><p>You can see here that some of these fields were added at the oldest dataset version, while some were added only at this latest
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version. Some fields were even modified and had a type change at the latest version!</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="graphql">GraphQL<a href="#graphql" class="hash-link" aria-label="Direct link to GraphQL" title="Direct link to GraphQL"></a></h3><ul><li><a href="/docs/graphql/queries#getSchemaBlame">getSchemaBlame</a></li><li><a href="/docs/graphql/queries#getSchemaVersionList">getSchemaVersionList</a></li></ul><h2 class="anchor anchorWithStickyNavbar_LWe7" id="faq-and-troubleshooting">FAQ and Troubleshooting<a href="#faq-and-troubleshooting" class="hash-link" aria-label="Direct link to FAQ and Troubleshooting" title="Direct link to FAQ and Troubleshooting"></a></h2><p><strong>What updates are planned for the Schema History feature?</strong></p><p>In the future, we plan on adding the following features</p><ul><li>Supporting a linear timeline view where you can see what changes were made to various schema fields over time</li><li>Adding a diff viewer that highlights the differences between two versions of a Dataset</li></ul></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="slackUtm_uoBr"><div class="slackUtm_uoBr"><hr>Need more help? Join the conversation in <a href="https://datahub.com/slack?utm_source=docs&utm_medium=footer&utm_campaign=docs_footer&utm_content=docs/schema-history">Slack!</a></div></div><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a href="https://github.com/datahub-project/datahub/blob/master/docs/schema-history.md" target="_blank" rel="noreferrer noopener" class="theme-edit-this-page"><svg fill="currentColor" height="20" width="20" viewBox="0 0 40 40" class="iconEdit_Z9Sw" aria-hidden="true"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div><div class="col lastUpdated_VsjB"></div></div></footer><div class="feedbackWrapper_mUHF"><div class="feedbackWidget_PX4d"><div class="feedbackButtons_wn3V"><strong>Is this page helpful?</strong><div><button class="feedbackButton_UgQs"><span role="img" aria-label="like" class="anticon anticon-like"><svg viewBox="64 64 896 896" focusable="false" data-icon="like" width="1em" height="1em" fill="currentColor" aria-hidden="true"><path d="M885.9 533.7c16.8-22.2 26.1-49.4 26.1-77.7 0-44.9-25.1-87.4-65.5-111.1a67.67 67.67 0 00-34.3-9.3H572.4l6-122.9c1.4-29.7-9.1-57.9-29.5-79.4A106.62 106.62 0 00471 99.9c-52 0-98 35-111.8 85.1l-85.9 311H144c-17.7 0-32 14.3-32 32v364c0 17.7 14.3 32 32 32h601.3c9.2 0 18.2-1.8 26.5-5.4 47.6-20.3 78.3-66.8 78.3-118.4 0-12.6-1.8-25-5.4-37 16.8-22.2 26.1-49.4 26.1-77.7 0-12.6-1.8-25-5.4-37 16.8-22.2 26.1-49.4 26.1-77.7-.2-12.6-2-25.1-5.6-37.1zM184 852V568h81v284h-81zm636.4-353l-21.9 19 13.9 25.4a56.2 56.2 0 016.9 27.3c0 16.5-7.2 32.2-19.6 43l-21.9 19 13.9 25.4a56.2 56.2 0 016.9 27.3c0 16.5-7.2 32.2-19.6 43l-21.9 19 13.9 25.4a56.2 56.2 0 016.9 27.3c0 22.4-13.2 42.6-33.6 51.8H329V564.8l99.5-360.5a44.1 44.1 0 0142.2-32.3c7.6 0 15.1 2.2 21.1 6.7 9.9 7.4 15.2 18.6 14.6 30.5l-9.6 198.4h314.4C829 418.5 840 436.9 840 456c0 16.5-7.2 32.1-19.6 43z"></path></svg></span></button><button class="feedbackButton_UgQs"><span role="img" aria-label="dislike" class="anticon anticon-dislike"><svg viewBox="64 64 896 896" focusable="false" data-icon="dislike" width="1em" height="1em" fill="currentColor" aria-hidden="true"><path d="M885.9 490.3c3.6-12 5.4-24.4 5.4-37 0-28.3-9.3-55.5-26.1-77.7 3.6-12 5.4-24.4 5.4-37 0-28.3-9.3-55.5-26.1-77.7 3.6-12 5.4-24.4 5.4-37 0-51.6-30.7-98.1-78.3-118.4a66.1 66.1 0 00-26.5-5.4H144c-17.7 0-32 14.3-32 32v364c0 17.7 14.3 32 32 32h129.3l85.8 310.8C372.9 889 418.9 924 470.9 924c29.7 0 57.4-11.8 77.9-33.4 20.5-21.5 31-49.7 29.5-79.4l-6-122.9h239.9c12.1 0 23.9-3.2 34.3-9.3 40.4-23.5 65.5-66.1 65.5-111 0-28.3-9.3-55.5-26.1-77.7zM184 456V172h81v284h-81zm627.2 160.4H496.8l9.6 198.4c.6 11.9-4.7 23.1-14.6 30.5-6.1 4.5-13.6 6.8-21.1 6.7a44.28 44.28 0 01-42.2-32.3L329 459.2V172h415.4a56.85 56.85 0 0133.6 51.8c0 9.7-2.3 18.9-6.9
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