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<!-- -->
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<p>Langflow integrates with <a href="https://cloud.google.com/bigquery" target="_blank" rel="noopener noreferrer">Google BigQuery</a> through the <strong>BigQuery</strong> component in the <a href="/bundles-google"><strong>Google</strong> bundle</a>, allowing you to execute SQL queries and retrieve data from your BigQuery datasets.</p>
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<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="prerequisites">Prerequisites<a href="#prerequisites" class="hash-link" aria-label="Direct link to Prerequisites" title="Direct link to Prerequisites"></a></h2>
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<ul>
|
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<li>A <a href="https://developers.google.com/workspace/guides/create-project" target="_blank" rel="noopener noreferrer">Google Cloud project</a> with the BigQuery API enabled</li>
|
||
<li>A <a href="https://developers.google.com/workspace/guides/create-credentials#service-account" target="_blank" rel="noopener noreferrer">service account</a> with the <strong>BigQuery Job User</strong> role</li>
|
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<li>A <a href="https://cloud.google.com/bigquery/docs/datasets-intro" target="_blank" rel="noopener noreferrer">BigQuery dataset and table</a></li>
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<li>A <a href="/get-started-installation">running Langflow server</a></li>
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</ul>
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<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="create-a-service-account-with-bigquery-access">Create a service account with BigQuery access<a href="#create-a-service-account-with-bigquery-access" class="hash-link" aria-label="Direct link to Create a service account with BigQuery access" title="Direct link to Create a service account with BigQuery access"></a></h2>
|
||
<ol>
|
||
<li>Select and enable your Google Cloud project.
|
||
For more information, see <a href="https://developers.google.com/workspace/guides/create-project" target="_blank" rel="noopener noreferrer">Create a Google Cloud project</a>.</li>
|
||
<li>Create a service account in your Google Cloud project.
|
||
For more information, see <a href="https://developers.google.com/workspace/guides/create-credentials#service-account" target="_blank" rel="noopener noreferrer">Create a service account</a>.</li>
|
||
<li>Assign the <strong>BigQuery Job User</strong> role to your new account.
|
||
This role allows Langflow to access BigQuery resources with the service account.
|
||
You may also need to allow access to your BigQuery dataset.
|
||
For more information, see <a href="https://cloud.google.com/bigquery/docs/access-control" target="_blank" rel="noopener noreferrer">BigQuery access control with IAM</a>.</li>
|
||
<li>To generate a new JSON key for the service account, navigate to your service account.</li>
|
||
<li>Click <strong>Add Key</strong>, and then click <strong>Create new key</strong>.</li>
|
||
<li>Under <strong>Key type</strong>, select <strong>JSON</strong>, and then click <strong>Create</strong>.
|
||
A JSON private key file is downloaded to your machine.
|
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Now that you have a service account and a JSON private key, you need to configure the credentials in the Langflow <strong>BigQuery</strong> component.</li>
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</ol>
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<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="configure-credentials-in-the-langflow-component">Configure credentials in the Langflow component<a href="#configure-credentials-in-the-langflow-component" class="hash-link" aria-label="Direct link to Configure credentials in the Langflow component" title="Direct link to Configure credentials in the Langflow component"></a></h2>
|
||
<p>With your service account configured and your credentials JSON file created, follow these steps to authenticate the Langflow application.</p>
|
||
<ol>
|
||
<li>Create a new flow in Langflow.</li>
|
||
<li>In the <strong>Components</strong> menu, find the <strong>BigQuery</strong> component, and then add it to your flow.</li>
|
||
<li>In the <strong>BigQuery</strong> component's <strong>Upload Service Account JSON</strong> field, click <strong>Select file</strong>.</li>
|
||
<li>In the <strong>My Files</strong> pane, select <strong>Click or drag files here</strong>.
|
||
Your file browser opens.</li>
|
||
<li>In your file browser, select the service account JSON file, and then click <strong>Open</strong>.</li>
|
||
<li>In the <strong>My Files</strong> pane, select your service account JSON file, and then click <strong>Select files</strong>.
|
||
The <strong>BigQuery</strong> component can now query your datasets and tables using your service account JSON file.</li>
|
||
</ol>
|
||
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="query-a-bigquery-dataset">Query a BigQuery dataset<a href="#query-a-bigquery-dataset" class="hash-link" aria-label="Direct link to Query a BigQuery dataset" title="Direct link to Query a BigQuery dataset"></a></h2>
|
||
<p>With your component credentials configured, query your BigQuery datasets and tables to confirm connectivity.</p>
|
||
<ol>
|
||
<li>
|
||
<p>Connect <strong>Chat Input</strong> and <strong>Chat Output</strong> components to the <strong>BigQuery</strong> component.</p>
|
||
<p><img decoding="async" loading="lazy" alt="BigQuery component connected to chat input and output" src="/assets/images/integrations-bigquery-48f5e5cc351d8caf9e9837ed495a5367.png" width="4000" height="1680" class="img_ev3q"></p>
|
||
</li>
|
||
<li>
|
||
<p>Open the <strong>Playground</strong>, and then submit a valid SQL query.</p>
|
||
<p>This example queries a table of Oscar winners stored within a BigQuery dataset called <code>the_oscar_award</code>:</p>
|
||
<div class="ch-codeblock not-prose" data-ch-theme="github-dark"><div class="ch-code-wrapper ch-code" data-ch-measured="false"><code class="ch-code-scroll-parent"><br><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>SELECT film, category, year_film</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>FROM `big-query-langflow-project.the_oscar_award.oscar_winners`</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>WHERE winner = TRUE</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>LIMIT 10</span></div></div><br></code></div></div>
|
||
<details class="details_lb9f alert alert--info details_b_Ee" data-collapsed="true"><summary>Result</summary><div><div class="collapsibleContent_i85q"><div class="ch-codeblock not-prose" data-ch-theme="github-dark"><div class="ch-code-wrapper ch-code" data-ch-measured="false"><code class="ch-code-scroll-parent"><br><div><span class="ch-code-line-number">_<!-- -->11</span><div style="display:inline-block;margin-left:16px"><span>film category year_film</span></div></div><div><span class="ch-code-line-number">_<!-- -->11</span><div style="display:inline-block;margin-left:16px"><span>The Last Command ACTOR 1927</span></div></div><div><span class="ch-code-line-number">_<!-- -->11</span><div style="display:inline-block;margin-left:16px"><span>7th Heaven ACTRESS 1927</span></div></div><div><span class="ch-code-line-number">_<!-- -->11</span><div style="display:inline-block;margin-left:16px"><span>The Dove; ART DIRECTION 1927</span></div></div><div><span class="ch-code-line-number">_<!-- -->11</span><div style="display:inline-block;margin-left:16px"><span>Sunrise CINEMATOGRAPHY 1927</span></div></div><div><span class="ch-code-line-number">_<!-- -->11</span><div style="display:inline-block;margin-left:16px"><span>Sunrise CINEMATOGRAPHY 1927</span></div></div><div><span class="ch-code-line-number">_<!-- -->11</span><div style="display:inline-block;margin-left:16px"><span>Two Arabian Knights DIRECTING (Comedy Picture) 1927</span></div></div><div><span class="ch-code-line-number">_<!-- -->11</span><div style="display:inline-block;margin-left:16px"><span>7th Heaven DIRECTING (Dramatic Picture) 1927</span></div></div><div><span class="ch-code-line-number">_<!-- -->11</span><div style="display:inline-block;margin-left:16px"><span>Wings ENGINEERING EFFECTS 1927</span></div></div><div><span class="ch-code-line-number">_<!-- -->11</span><div style="display:inline-block;margin-left:16px"><span>Wings OUTSTANDING PICTURE 1927</span></div></div><div><span class="ch-code-line-number">_<!-- -->11</span><div style="display:inline-block;margin-left:16px"><span>Sunrise UNIQUE AND ARTISTIC PICTURE 1927</span></div></div><br></code></div></div></div></div></details>
|
||
<p>A successful chat confirms the component can access the BigQuery table.</p>
|
||
</li>
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