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| <div class="section" id="module-airflow.operators.presto_check_operator"> |
| <span id="airflow-operators-presto-check-operator"></span><h1><a class="reference internal" href="#module-airflow.operators.presto_check_operator" title="airflow.operators.presto_check_operator"><code class="xref py py-mod docutils literal notranslate"><span class="pre">airflow.operators.presto_check_operator</span></code></a><a class="headerlink" href="#module-airflow.operators.presto_check_operator" 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.operators.presto_check_operator.PrestoCheckOperator"> |
| <em class="property">class </em><code class="sig-prename descclassname">airflow.operators.presto_check_operator.</code><code class="sig-name descname">PrestoCheckOperator</code><span class="sig-paren">(</span><em class="sig-param">sql</em>, <em class="sig-param">presto_conn_id='presto_default'</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/operators/presto_check_operator.html#PrestoCheckOperator"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.operators.presto_check_operator.PrestoCheckOperator" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Bases: <a class="reference internal" href="../check_operator/index.html#airflow.operators.check_operator.CheckOperator" title="airflow.operators.check_operator.CheckOperator"><code class="xref py py-class docutils literal notranslate"><span class="pre">airflow.operators.check_operator.CheckOperator</span></code></a></p> |
| <p>Performs checks against Presto. The <code class="docutils literal notranslate"><span class="pre">PrestoCheckOperator</span></code> expects |
| a sql query that will return a single row. Each value on that |
| first row is evaluated using python <code class="docutils literal notranslate"><span class="pre">bool</span></code> casting. If any of the |
| values return <code class="docutils literal notranslate"><span class="pre">False</span></code> the check is failed and errors out.</p> |
| <p>Note that Python bool casting evals the following as <code class="docutils literal notranslate"><span class="pre">False</span></code>:</p> |
| <ul class="simple"> |
| <li><p><code class="docutils literal notranslate"><span class="pre">False</span></code></p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">0</span></code></p></li> |
| <li><p>Empty string (<code class="docutils literal notranslate"><span class="pre">""</span></code>)</p></li> |
| <li><p>Empty list (<code class="docutils literal notranslate"><span class="pre">[]</span></code>)</p></li> |
| <li><p>Empty dictionary or set (<code class="docutils literal notranslate"><span class="pre">{}</span></code>)</p></li> |
| </ul> |
| <p>Given a query like <code class="docutils literal notranslate"><span class="pre">SELECT</span> <span class="pre">COUNT(*)</span> <span class="pre">FROM</span> <span class="pre">foo</span></code>, it will fail only if |
| the count <code class="docutils literal notranslate"><span class="pre">==</span> <span class="pre">0</span></code>. You can craft much more complex query that could, |
| for instance, check that the table has the same number of rows as |
| the source table upstream, or that the count of today’s partition is |
| greater than yesterday’s partition, or that a set of metrics are less |
| than 3 standard deviation for the 7 day average.</p> |
| <p>This operator can be used as a data quality check in your pipeline, and |
| depending on where you put it in your DAG, you have the choice to |
| stop the critical path, preventing from |
| publishing dubious data, or on the side and receive email alerts |
| without stopping the progress of the DAG.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Parameters</dt> |
| <dd class="field-odd"><ul class="simple"> |
| <li><p><strong>sql</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.8)"><em>str</em></a>) – the sql to be executed</p></li> |
| <li><p><strong>presto_conn_id</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.8)"><em>str</em></a>) – reference to the Presto database</p></li> |
| </ul> |
| </dd> |
| </dl> |
| <dl class="method"> |
| <dt id="airflow.operators.presto_check_operator.PrestoCheckOperator.get_db_hook"> |
| <code class="sig-name descname">get_db_hook</code><span class="sig-paren">(</span><em class="sig-param">self</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../_modules/airflow/operators/presto_check_operator.html#PrestoCheckOperator.get_db_hook"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.operators.presto_check_operator.PrestoCheckOperator.get_db_hook" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| </dd></dl> |
| |
| <dl class="class"> |
| <dt id="airflow.operators.presto_check_operator.PrestoValueCheckOperator"> |
| <em class="property">class </em><code class="sig-prename descclassname">airflow.operators.presto_check_operator.</code><code class="sig-name descname">PrestoValueCheckOperator</code><span class="sig-paren">(</span><em class="sig-param">sql</em>, <em class="sig-param">pass_value</em>, <em class="sig-param">tolerance=None</em>, <em class="sig-param">presto_conn_id='presto_default'</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/operators/presto_check_operator.html#PrestoValueCheckOperator"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.operators.presto_check_operator.PrestoValueCheckOperator" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Bases: <a class="reference internal" href="../check_operator/index.html#airflow.operators.check_operator.ValueCheckOperator" title="airflow.operators.check_operator.ValueCheckOperator"><code class="xref py py-class docutils literal notranslate"><span class="pre">airflow.operators.check_operator.ValueCheckOperator</span></code></a></p> |
| <p>Performs a simple value check using sql code.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Parameters</dt> |
| <dd class="field-odd"><ul class="simple"> |
| <li><p><strong>sql</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.8)"><em>str</em></a>) – the sql to be executed</p></li> |
| <li><p><strong>presto_conn_id</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.8)"><em>str</em></a>) – reference to the Presto database</p></li> |
| </ul> |
| </dd> |
| </dl> |
| <dl class="method"> |
| <dt id="airflow.operators.presto_check_operator.PrestoValueCheckOperator.get_db_hook"> |
| <code class="sig-name descname">get_db_hook</code><span class="sig-paren">(</span><em class="sig-param">self</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../_modules/airflow/operators/presto_check_operator.html#PrestoValueCheckOperator.get_db_hook"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.operators.presto_check_operator.PrestoValueCheckOperator.get_db_hook" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| </dd></dl> |
| |
| <dl class="class"> |
| <dt id="airflow.operators.presto_check_operator.PrestoIntervalCheckOperator"> |
| <em class="property">class </em><code class="sig-prename descclassname">airflow.operators.presto_check_operator.</code><code class="sig-name descname">PrestoIntervalCheckOperator</code><span class="sig-paren">(</span><em class="sig-param">table</em>, <em class="sig-param">metrics_thresholds</em>, <em class="sig-param">date_filter_column='ds'</em>, <em class="sig-param">days_back=-7</em>, <em class="sig-param">presto_conn_id='presto_default'</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/operators/presto_check_operator.html#PrestoIntervalCheckOperator"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.operators.presto_check_operator.PrestoIntervalCheckOperator" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Bases: <a class="reference internal" href="../check_operator/index.html#airflow.operators.check_operator.IntervalCheckOperator" title="airflow.operators.check_operator.IntervalCheckOperator"><code class="xref py py-class docutils literal notranslate"><span class="pre">airflow.operators.check_operator.IntervalCheckOperator</span></code></a></p> |
| <p>Checks that the values of metrics given as SQL expressions are within |
| a certain tolerance of the ones from days_back before.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Parameters</dt> |
| <dd class="field-odd"><ul class="simple"> |
| <li><p><strong>table</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.8)"><em>str</em></a>) – the table name</p></li> |
| <li><p><strong>days_back</strong> (<a class="reference external" href="https://docs.python.org/3/library/functions.html#int" title="(in Python v3.8)"><em>int</em></a>) – number of days between ds and the ds we want to check |
| against. Defaults to 7 days</p></li> |
| <li><p><strong>metrics_threshold</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#dict" title="(in Python v3.8)"><em>dict</em></a>) – a dictionary of ratios indexed by metrics</p></li> |
| <li><p><strong>presto_conn_id</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.8)"><em>str</em></a>) – reference to the Presto database</p></li> |
| </ul> |
| </dd> |
| </dl> |
| <dl class="method"> |
| <dt id="airflow.operators.presto_check_operator.PrestoIntervalCheckOperator.get_db_hook"> |
| <code class="sig-name descname">get_db_hook</code><span class="sig-paren">(</span><em class="sig-param">self</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../_modules/airflow/operators/presto_check_operator.html#PrestoIntervalCheckOperator.get_db_hook"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.operators.presto_check_operator.PrestoIntervalCheckOperator.get_db_hook" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
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