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class="tocCollapsible_jdIR theme-doc-toc-mobile tocMobile_TmEX"><button type="button" class="clean-btn tocCollapsibleButton_Fzxq">On this page</button></div><div class="theme-doc-markdown markdown"><h2 class="anchor anchorWithStickyNavbar_mojV" id="extra-database-settings">Extra Database Settings<a class="hash-link" href="#extra-database-settings" title="Direct link to heading"></a></h2><h3 class="anchor anchorWithStickyNavbar_mojV" id="deeper-sqlalchemy-integration">Deeper SQLAlchemy Integration<a class="hash-link" href="#deeper-sqlalchemy-integration" title="Direct link to heading"></a></h3><p>It is possible to tweak the database connection information using the parameters exposed by |
| SQLAlchemy. In the <strong>Database edit</strong> view, you can edit the <strong>Extra</strong> field as a JSON blob.</p><p>This JSON string contains extra configuration elements. The <code>engine_params</code> object gets unpacked |
| into the <code>sqlalchemy.create_engine</code> call, while the <code>metadata_params</code> get unpacked into the |
| <code>sqlalchemy.MetaData</code> call. Refer to the SQLAlchemy docs for more information.</p><h3 class="anchor anchorWithStickyNavbar_mojV" id="schemas">Schemas<a class="hash-link" href="#schemas" title="Direct link to heading"></a></h3><p>Databases like Postgres and Redshift use the <strong>schema</strong> as the logical entity on top of the |
| <strong>database</strong>. For Superset to connect to a specific schema, you can set the <strong>schema</strong> parameter in |
| the <strong>Edit Tables</strong> form (Sources > Tables > Edit record).</p><h3 class="anchor anchorWithStickyNavbar_mojV" id="external-password-store-for-sqlalchemy-connections">External Password Store for SQLAlchemy Connections<a class="hash-link" href="#external-password-store-for-sqlalchemy-connections" title="Direct link to heading"></a></h3><p>Superset can be configured to use an external store for database passwords. This is useful if you a |
| running a custom secret distribution framework and do not wish to store secrets in Superset’s meta |
| database.</p><p>Example: Write a function that takes a single argument of type <code>sqla.engine.url</code> and returns the |
| password for the given connection string. Then set <code>SQLALCHEMY_CUSTOM_PASSWORD_STORE</code> in your config |
| file to point to that function.</p><div class="codeBlockContainer_I0IT language-python theme-code-block"><div class="codeBlockContent_wNvx python"><pre tabindex="0" class="prism-code language-python codeBlock_jd64 thin-scrollbar" style="color:#393A34;background-color:#f6f8fa"><code class="codeBlockLines_mRuA"><span class="token-line" style="color:#393A34"><span class="token keyword" style="color:#00009f">def</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">example_lookup_password</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">url</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> secret </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token operator" style="color:#393A34"><<</span><span class="token plain">get password </span><span class="token keyword" style="color:#00009f">from</span><span class="token plain"> external framework</span><span class="token operator" style="color:#393A34">>></span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">return</span><span class="token plain"> </span><span class="token string" style="color:#e3116c">'secret'</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">SQLALCHEMY_CUSTOM_PASSWORD_STORE </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> example_lookup_password</span><br></span></code></pre><button type="button" aria-label="Copy code to clipboard" class="copyButton_wuS7 clean-btn">Copy</button></div></div><p>A common pattern is to use environment variables to make secrets available. |
| <code>SQLALCHEMY_CUSTOM_PASSWORD_STORE</code> can also be used for that purpose.</p><div class="codeBlockContainer_I0IT language-python theme-code-block"><div class="codeBlockContent_wNvx python"><pre tabindex="0" class="prism-code language-python codeBlock_jd64 thin-scrollbar" style="color:#393A34;background-color:#f6f8fa"><code class="codeBlockLines_mRuA"><span class="token-line" style="color:#393A34"><span class="token keyword" style="color:#00009f">def</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">example_password_as_env_var</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">url</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token comment" style="color:#999988;font-style:italic"># assuming the uri looks like</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token comment" style="color:#999988;font-style:italic"># mysql://localhost?superset_user:{SUPERSET_PASSWORD}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">return</span><span class="token plain"> url</span><span class="token punctuation" style="color:#393A34">.</span><span class="token plain">password</span><span class="token punctuation" style="color:#393A34">.</span><span class="token builtin">format</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">os</span><span class="token punctuation" style="color:#393A34">.</span><span class="token plain">environ</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">SQLALCHEMY_CUSTOM_PASSWORD_STORE </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> example_password_as_env_var</span><br></span></code></pre><button type="button" aria-label="Copy code to clipboard" class="copyButton_wuS7 clean-btn">Copy</button></div></div><h3 class="anchor anchorWithStickyNavbar_mojV" id="ssl-access-to-databases">SSL Access to Databases<a class="hash-link" href="#ssl-access-to-databases" title="Direct link to heading"></a></h3><p>You can use the <code>Extra</code> field in the <strong>Edit Databases</strong> form to configure SSL:</p><div class="codeBlockContainer_I0IT language-JSON theme-code-block"><div class="codeBlockContent_wNvx JSON"><pre tabindex="0" class="prism-code language-JSON codeBlock_jd64 thin-scrollbar" style="color:#393A34;background-color:#f6f8fa"><code class="codeBlockLines_mRuA"><span class="token-line" style="color:#393A34"><span class="token plain">{</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> "metadata_params": {},</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> "engine_params": {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> "connect_args":{</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> "sslmode":"require",</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> "sslrootcert": "/path/to/my/pem"</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> }</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> }</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">}</span><br></span></code></pre><button type="button" aria-label="Copy code to clipboard" class="copyButton_wuS7 clean-btn">Copy</button></div></div></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a href="https://github.com/apache/superset/tree/master/docs/docs/databases/extra-settings.mdx" target="_blank" rel="noreferrer noopener" class="theme-edit-this-page"><svg fill="currentColor" height="20" width="20" viewBox="0 0 40 40" class="iconEdit_dcUD" 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_foO9"></div></div></footer></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Docs pages navigation"><div class="pagination-nav__item"><a 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