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| <div class="section" id="module-airflow.contrib.operators.bigquery_get_data"> |
| <span id="airflow-contrib-operators-bigquery-get-data"></span><h1><a class="reference internal" href="#module-airflow.contrib.operators.bigquery_get_data" title="airflow.contrib.operators.bigquery_get_data"><code class="xref py py-mod docutils literal notranslate"><span class="pre">airflow.contrib.operators.bigquery_get_data</span></code></a><a class="headerlink" href="#module-airflow.contrib.operators.bigquery_get_data" title="Permalink to this headline">¶</a></h1> |
| <div class="section" id="module-contents"> |
| <h2>Module Contents<a class="headerlink" href="#module-contents" title="Permalink to this headline">¶</a></h2> |
| <dl class="class"> |
| <dt id="airflow.contrib.operators.bigquery_get_data.BigQueryGetDataOperator"> |
| <em class="property">class </em><code class="sig-prename descclassname">airflow.contrib.operators.bigquery_get_data.</code><code class="sig-name descname">BigQueryGetDataOperator</code><span class="sig-paren">(</span><em class="sig-param">dataset_id</em>, <em class="sig-param">table_id</em>, <em class="sig-param">max_results='100'</em>, <em class="sig-param">selected_fields=None</em>, <em class="sig-param">bigquery_conn_id='bigquery_default'</em>, <em class="sig-param">delegate_to=None</em>, <em class="sig-param">*args</em>, <em class="sig-param">**kwargs</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/bigquery_get_data.html#BigQueryGetDataOperator"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.bigquery_get_data.BigQueryGetDataOperator" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Bases: <a class="reference internal" href="../../../models/index.html#airflow.models.BaseOperator" title="airflow.models.BaseOperator"><code class="xref py py-class docutils literal notranslate"><span class="pre">airflow.models.BaseOperator</span></code></a></p> |
| <p>Fetches the data from a BigQuery table (alternatively fetch data for selected columns) |
| and returns data in a python list. The number of elements in the returned list will |
| be equal to the number of rows fetched. Each element in the list will again be a list |
| where element would represent the columns values for that row.</p> |
| <p><strong>Example Result</strong>: <code class="docutils literal notranslate"><span class="pre">[['Tony',</span> <span class="pre">'10'],</span> <span class="pre">['Mike',</span> <span class="pre">'20'],</span> <span class="pre">['Steve',</span> <span class="pre">'15']]</span></code></p> |
| <div class="admonition note"> |
| <p class="admonition-title">Note</p> |
| <p>If you pass fields to <code class="docutils literal notranslate"><span class="pre">selected_fields</span></code> which are in different order than the |
| order of columns already in |
| BQ table, the data will still be in the order of BQ table. |
| For example if the BQ table has 3 columns as |
| <code class="docutils literal notranslate"><span class="pre">[A,B,C]</span></code> and you pass ‘B,A’ in the <code class="docutils literal notranslate"><span class="pre">selected_fields</span></code> |
| the data would still be of the form <code class="docutils literal notranslate"><span class="pre">'A,B'</span></code>.</p> |
| </div> |
| <p><strong>Example</strong>:</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">get_data</span> <span class="o">=</span> <span class="n">BigQueryGetDataOperator</span><span class="p">(</span> |
| <span class="n">task_id</span><span class="o">=</span><span class="s1">'get_data_from_bq'</span><span class="p">,</span> |
| <span class="n">dataset_id</span><span class="o">=</span><span class="s1">'test_dataset'</span><span class="p">,</span> |
| <span class="n">table_id</span><span class="o">=</span><span class="s1">'Transaction_partitions'</span><span class="p">,</span> |
| <span class="n">max_results</span><span class="o">=</span><span class="s1">'100'</span><span class="p">,</span> |
| <span class="n">selected_fields</span><span class="o">=</span><span class="s1">'DATE'</span><span class="p">,</span> |
| <span class="n">bigquery_conn_id</span><span class="o">=</span><span class="s1">'airflow-service-account'</span> |
| <span class="p">)</span> |
| </pre></div> |
| </div> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Parameters</dt> |
| <dd class="field-odd"><ul class="simple"> |
| <li><p><strong>dataset_id</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.7)"><em>str</em></a>) – The dataset ID of the requested table. (templated)</p></li> |
| <li><p><strong>table_id</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.7)"><em>str</em></a>) – The table ID of the requested table. (templated)</p></li> |
| <li><p><strong>max_results</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.7)"><em>str</em></a>) – The maximum number of records (rows) to be fetched |
| from the table. (templated)</p></li> |
| <li><p><strong>selected_fields</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.7)"><em>str</em></a>) – List of fields to return (comma-separated). If |
| unspecified, all fields are returned.</p></li> |
| <li><p><strong>bigquery_conn_id</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.7)"><em>str</em></a>) – reference to a specific BigQuery hook.</p></li> |
| <li><p><strong>delegate_to</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.7)"><em>str</em></a>) – The account to impersonate, if any. |
| For this to work, the service account making the request must have domain-wide |
| delegation enabled.</p></li> |
| </ul> |
| </dd> |
| </dl> |
| <dl class="attribute"> |
| <dt id="airflow.contrib.operators.bigquery_get_data.BigQueryGetDataOperator.template_fields"> |
| <code class="sig-name descname">template_fields</code><em class="property"> = ['dataset_id', 'table_id', 'max_results']</em><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/bigquery_get_data.html#BigQueryGetDataOperator.template_fields"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.bigquery_get_data.BigQueryGetDataOperator.template_fields" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="attribute"> |
| <dt id="airflow.contrib.operators.bigquery_get_data.BigQueryGetDataOperator.ui_color"> |
| <code class="sig-name descname">ui_color</code><em class="property"> = #e4f0e8</em><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/bigquery_get_data.html#BigQueryGetDataOperator.ui_color"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.bigquery_get_data.BigQueryGetDataOperator.ui_color" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.contrib.operators.bigquery_get_data.BigQueryGetDataOperator.execute"> |
| <code class="sig-name descname">execute</code><span class="sig-paren">(</span><em class="sig-param">self</em>, <em class="sig-param">context</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/bigquery_get_data.html#BigQueryGetDataOperator.execute"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.bigquery_get_data.BigQueryGetDataOperator.execute" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
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