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| <div class="section" id="module-airflow.hooks.postgres_hook"> |
| <span id="airflow-hooks-postgres-hook"></span><h1><a class="reference internal" href="#module-airflow.hooks.postgres_hook" title="airflow.hooks.postgres_hook"><code class="xref py py-mod docutils literal notranslate"><span class="pre">airflow.hooks.postgres_hook</span></code></a><a class="headerlink" href="#module-airflow.hooks.postgres_hook" 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.hooks.postgres_hook.PostgresHook"> |
| <em class="property">class </em><code class="sig-prename descclassname">airflow.hooks.postgres_hook.</code><code class="sig-name descname">PostgresHook</code><span class="sig-paren">(</span><em class="sig-param">*args</em>, <em class="sig-param">**kwargs</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../_modules/airflow/hooks/postgres_hook.html#PostgresHook"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.hooks.postgres_hook.PostgresHook" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Bases: <a class="reference internal" href="../dbapi_hook/index.html#airflow.hooks.dbapi_hook.DbApiHook" title="airflow.hooks.dbapi_hook.DbApiHook"><code class="xref py py-class docutils literal notranslate"><span class="pre">airflow.hooks.dbapi_hook.DbApiHook</span></code></a></p> |
| <p>Interact with Postgres. |
| You can specify ssl parameters in the extra field of your connection |
| as <code class="docutils literal notranslate"><span class="pre">{"sslmode":</span> <span class="pre">"require",</span> <span class="pre">"sslcert":</span> <span class="pre">"/path/to/cert.pem",</span> <span class="pre">etc}</span></code>.</p> |
| <p>Note: For Redshift, use keepalives_idle in the extra connection parameters |
| and set it to less than 300 seconds.</p> |
| <p>Note: For AWS IAM authentication, use iam in the extra connection parameters |
| and set it to true. Leave the password field empty. This will use the the |
| “aws_default” connection to get the temporary token unless you override |
| in extras. |
| extras example: <code class="docutils literal notranslate"><span class="pre">{"iam":true,</span> <span class="pre">"aws_conn_id":"my_aws_conn"}</span></code> |
| For Redshift, also use redshift in the extra connection parameters and |
| set it to true. The cluster-identifier is extracted from the beginning of |
| the host field, so is optional. It can however be overridden in the extra field. |
| extras example: <code class="docutils literal notranslate"><span class="pre">{"iam":true,</span> <span class="pre">"redshift":true,</span> <span class="pre">"cluster-identifier":</span> <span class="pre">"my_cluster_id"}</span></code></p> |
| <dl class="attribute"> |
| <dt id="airflow.hooks.postgres_hook.PostgresHook.conn_name_attr"> |
| <code class="sig-name descname">conn_name_attr</code><em class="property"> = postgres_conn_id</em><a class="reference internal" href="../../../../_modules/airflow/hooks/postgres_hook.html#PostgresHook.conn_name_attr"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.hooks.postgres_hook.PostgresHook.conn_name_attr" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="attribute"> |
| <dt id="airflow.hooks.postgres_hook.PostgresHook.default_conn_name"> |
| <code class="sig-name descname">default_conn_name</code><em class="property"> = postgres_default</em><a class="reference internal" href="../../../../_modules/airflow/hooks/postgres_hook.html#PostgresHook.default_conn_name"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.hooks.postgres_hook.PostgresHook.default_conn_name" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="attribute"> |
| <dt id="airflow.hooks.postgres_hook.PostgresHook.supports_autocommit"> |
| <code class="sig-name descname">supports_autocommit</code><em class="property"> = True</em><a class="reference internal" href="../../../../_modules/airflow/hooks/postgres_hook.html#PostgresHook.supports_autocommit"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.hooks.postgres_hook.PostgresHook.supports_autocommit" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.hooks.postgres_hook.PostgresHook.get_conn"> |
| <code class="sig-name descname">get_conn</code><span class="sig-paren">(</span><em class="sig-param">self</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../_modules/airflow/hooks/postgres_hook.html#PostgresHook.get_conn"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.hooks.postgres_hook.PostgresHook.get_conn" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.hooks.postgres_hook.PostgresHook.copy_expert"> |
| <code class="sig-name descname">copy_expert</code><span class="sig-paren">(</span><em class="sig-param">self</em>, <em class="sig-param">sql</em>, <em class="sig-param">filename</em>, <em class="sig-param">open=open</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../_modules/airflow/hooks/postgres_hook.html#PostgresHook.copy_expert"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.hooks.postgres_hook.PostgresHook.copy_expert" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Executes SQL using psycopg2 copy_expert method. |
| Necessary to execute COPY command without access to a superuser.</p> |
| <p>Note: if this method is called with a “COPY FROM” statement and |
| the specified input file does not exist, it creates an empty |
| file and no data is loaded, but the operation succeeds. |
| So if users want to be aware when the input file does not exist, |
| they have to check its existence by themselves.</p> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.hooks.postgres_hook.PostgresHook.bulk_load"> |
| <code class="sig-name descname">bulk_load</code><span class="sig-paren">(</span><em class="sig-param">self</em>, <em class="sig-param">table</em>, <em class="sig-param">tmp_file</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../_modules/airflow/hooks/postgres_hook.html#PostgresHook.bulk_load"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.hooks.postgres_hook.PostgresHook.bulk_load" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Loads a tab-delimited file into a database table</p> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.hooks.postgres_hook.PostgresHook.bulk_dump"> |
| <code class="sig-name descname">bulk_dump</code><span class="sig-paren">(</span><em class="sig-param">self</em>, <em class="sig-param">table</em>, <em class="sig-param">tmp_file</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../_modules/airflow/hooks/postgres_hook.html#PostgresHook.bulk_dump"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.hooks.postgres_hook.PostgresHook.bulk_dump" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Dumps a database table into a tab-delimited file</p> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.hooks.postgres_hook.PostgresHook._serialize_cell"> |
| <em class="property">static </em><code class="sig-name descname">_serialize_cell</code><span class="sig-paren">(</span><em class="sig-param">cell</em>, <em class="sig-param">conn</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../_modules/airflow/hooks/postgres_hook.html#PostgresHook._serialize_cell"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.hooks.postgres_hook.PostgresHook._serialize_cell" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Postgresql will adapt all arguments to the execute() method internally, |
| hence we return cell without any conversion.</p> |
| <p>See <a class="reference external" href="http://initd.org/psycopg/docs/advanced.html#adapting-new-types">http://initd.org/psycopg/docs/advanced.html#adapting-new-types</a> for |
| more information.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Parameters</dt> |
| <dd class="field-odd"><ul class="simple"> |
| <li><p><strong>cell</strong> (<a class="reference external" href="https://docs.python.org/3/library/functions.html#object" title="(in Python v3.7)"><em>object</em></a>) – The cell to insert into the table</p></li> |
| <li><p><strong>conn</strong> (<em>connection object</em>) – The database connection</p></li> |
| </ul> |
| </dd> |
| <dt class="field-even">Returns</dt> |
| <dd class="field-even"><p>The cell</p> |
| </dd> |
| <dt class="field-odd">Return type</dt> |
| <dd class="field-odd"><p><a class="reference external" href="https://docs.python.org/3/library/functions.html#object" title="(in Python v3.7)">object</a></p> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.hooks.postgres_hook.PostgresHook.get_iam_token"> |
| <code class="sig-name descname">get_iam_token</code><span class="sig-paren">(</span><em class="sig-param">self</em>, <em class="sig-param">conn</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../_modules/airflow/hooks/postgres_hook.html#PostgresHook.get_iam_token"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.hooks.postgres_hook.PostgresHook.get_iam_token" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Uses AWSHook to retrieve a temporary password to connect to Postgres |
| or Redshift. Port is required. If none is provided, default is used for |
| each service</p> |
| </dd></dl> |
| |
| </dd></dl> |
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