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| <h1>Source code for airflow.providers.postgres.hooks.postgres</h1><div class="highlight"><pre> |
| <span></span><span class="c1">#</span> |
| <span class="c1"># Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="c1"># or more contributor license agreements. See the NOTICE file</span> |
| <span class="c1"># distributed with this work for additional information</span> |
| <span class="c1"># regarding copyright ownership. The ASF licenses this file</span> |
| <span class="c1"># to you under the Apache License, Version 2.0 (the</span> |
| <span class="c1"># "License"); you may not use this file except in compliance</span> |
| <span class="c1"># with the License. You may obtain a copy of the License at</span> |
| <span class="c1">#</span> |
| <span class="c1"># http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="c1">#</span> |
| <span class="c1"># Unless required by applicable law or agreed to in writing,</span> |
| <span class="c1"># software distributed under the License is distributed on an</span> |
| <span class="c1"># "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span> |
| <span class="c1"># KIND, either express or implied. See the License for the</span> |
| <span class="c1"># specific language governing permissions and limitations</span> |
| <span class="c1"># under the License.</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">__future__</span><span class="w"> </span><span class="kn">import</span> <span class="n">annotations</span> |
| |
| <span class="kn">import</span><span class="w"> </span><span class="nn">os</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">collections.abc</span><span class="w"> </span><span class="kn">import</span> <span class="n">Mapping</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">contextlib</span><span class="w"> </span><span class="kn">import</span> <span class="n">closing</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">copy</span><span class="w"> </span><span class="kn">import</span> <span class="n">deepcopy</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">typing</span><span class="w"> </span><span class="kn">import</span> <span class="n">TYPE_CHECKING</span><span class="p">,</span> <span class="n">Any</span><span class="p">,</span> <span class="n">Literal</span><span class="p">,</span> <span class="n">Protocol</span><span class="p">,</span> <span class="n">TypeAlias</span><span class="p">,</span> <span class="n">cast</span><span class="p">,</span> <span class="n">overload</span> |
| |
| <span class="kn">import</span><span class="w"> </span><span class="nn">psycopg2</span> |
| <span class="kn">import</span><span class="w"> </span><span class="nn">psycopg2.extras</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">more_itertools</span><span class="w"> </span><span class="kn">import</span> <span class="n">chunked</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">psycopg2.extras</span><span class="w"> </span><span class="kn">import</span> <span class="n">DictCursor</span><span class="p">,</span> <span class="n">NamedTupleCursor</span><span class="p">,</span> <span class="n">RealDictCursor</span><span class="p">,</span> <span class="n">execute_batch</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">sqlalchemy.engine</span><span class="w"> </span><span class="kn">import</span> <span class="n">URL</span> |
| |
| <span class="kn">from</span><span class="w"> </span><span class="nn">airflow.configuration</span><span class="w"> </span><span class="kn">import</span> <span class="n">conf</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">airflow.exceptions</span><span class="w"> </span><span class="kn">import</span> <span class="n">AirflowOptionalProviderFeatureException</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">airflow.providers.common.compat.sdk</span><span class="w"> </span><span class="kn">import</span> <span class="n">AirflowException</span><span class="p">,</span> <span class="n">Connection</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">airflow.providers.common.sql.hooks.sql</span><span class="w"> </span><span class="kn">import</span> <span class="n">DbApiHook</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">airflow.providers.postgres.dialects.postgres</span><span class="w"> </span><span class="kn">import</span> <span class="n">PostgresDialect</span> |
| |
| <div class="viewcode-block" id="USE_PSYCOPG3"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.USE_PSYCOPG3">[docs]</a> |
| <span class="n">USE_PSYCOPG3</span><span class="p">:</span> <span class="nb">bool</span></div> |
| |
| <span class="k">try</span><span class="p">:</span> |
| <span class="kn">import</span><span class="w"> </span><span class="nn">psycopg</span><span class="w"> </span><span class="k">as</span><span class="w"> </span><span class="nn">psycopg</span> <span class="c1"># needed for patching in unit tests</span> |
| <span class="kn">import</span><span class="w"> </span><span class="nn">sqlalchemy</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">packaging.version</span><span class="w"> </span><span class="kn">import</span> <span class="n">Version</span> |
| |
| <div class="viewcode-block" id="sqlalchemy_version"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.sqlalchemy_version">[docs]</a> |
| <span class="n">sqlalchemy_version</span> <span class="o">=</span> <span class="n">Version</span><span class="p">(</span><span class="n">sqlalchemy</span><span class="o">.</span><span class="n">__version__</span><span class="p">)</span></div> |
| |
| <span class="n">is_sqla2</span> <span class="o">=</span> <span class="p">(</span><span class="n">sqlalchemy_version</span><span class="o">.</span><span class="n">major</span><span class="p">,</span> <span class="n">sqlalchemy_version</span><span class="o">.</span><span class="n">minor</span><span class="p">,</span> <span class="n">sqlalchemy_version</span><span class="o">.</span><span class="n">micro</span><span class="p">)</span> <span class="o">>=</span> <span class="p">(</span><span class="mi">2</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span> |
| |
| <span class="n">USE_PSYCOPG3</span> <span class="o">=</span> <span class="n">is_sqla2</span> <span class="c1"># implicitly includes `and bool(psycopg)` since the import above succeeded</span> |
| <span class="k">except</span> <span class="p">(</span><span class="ne">ImportError</span><span class="p">,</span> <span class="ne">ModuleNotFoundError</span><span class="p">):</span> |
| <span class="n">USE_PSYCOPG3</span> <span class="o">=</span> <span class="kc">False</span> |
| |
| <span class="k">if</span> <span class="n">USE_PSYCOPG3</span><span class="p">:</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">psycopg.rows</span><span class="w"> </span><span class="kn">import</span> <span class="n">dict_row</span><span class="p">,</span> <span class="n">namedtuple_row</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">psycopg.types.json</span><span class="w"> </span><span class="kn">import</span> <span class="n">register_default_adapters</span> |
| |
| <span class="k">if</span> <span class="n">TYPE_CHECKING</span><span class="p">:</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">pandas</span><span class="w"> </span><span class="kn">import</span> <span class="n">DataFrame</span> <span class="k">as</span> <span class="n">PandasDataFrame</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">polars</span><span class="w"> </span><span class="kn">import</span> <span class="n">DataFrame</span> <span class="k">as</span> <span class="n">PolarsDataFrame</span> |
| |
| <span class="kn">from</span><span class="w"> </span><span class="nn">airflow.providers.common.sql.dialects.dialect</span><span class="w"> </span><span class="kn">import</span> <span class="n">Dialect</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">airflow.providers.openlineage.sqlparser</span><span class="w"> </span><span class="kn">import</span> <span class="n">DatabaseInfo</span> |
| |
| <span class="k">if</span> <span class="n">USE_PSYCOPG3</span><span class="p">:</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">psycopg.errors</span><span class="w"> </span><span class="kn">import</span> <span class="n">Diagnostic</span> |
| |
| <div class="viewcode-block" id="CursorType"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.CursorType">[docs]</a> |
| <span class="n">CursorType</span><span class="p">:</span> <span class="n">TypeAlias</span> <span class="o">=</span> <span class="n">DictCursor</span> <span class="o">|</span> <span class="n">RealDictCursor</span> <span class="o">|</span> <span class="n">NamedTupleCursor</span></div> |
| |
| <div class="viewcode-block" id="CursorRow"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.CursorRow">[docs]</a> |
| <span class="n">CursorRow</span><span class="p">:</span> <span class="n">TypeAlias</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">Any</span><span class="p">]</span> <span class="o">|</span> <span class="nb">tuple</span><span class="p">[</span><span class="n">Any</span><span class="p">,</span> <span class="o">...</span><span class="p">]</span></div> |
| |
| |
| |
| <div class="viewcode-block" id="CompatConnection"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.CompatConnection">[docs]</a> |
| <span class="k">class</span><span class="w"> </span><span class="nc">CompatConnection</span><span class="p">(</span><span class="n">Protocol</span><span class="p">):</span> |
| <span class="w"> </span><span class="sd">"""Protocol for type hinting psycopg2 and psycopg3 connection objects."""</span> |
| |
| <div class="viewcode-block" id="CompatConnection.cursor"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.CompatConnection.cursor">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">cursor</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> <span class="o">-></span> <span class="n">Any</span><span class="p">:</span> <span class="o">...</span></div> |
| |
| <div class="viewcode-block" id="CompatConnection.commit"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.CompatConnection.commit">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">commit</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> <span class="o">...</span></div> |
| |
| <div class="viewcode-block" id="CompatConnection.close"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.CompatConnection.close">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">close</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> <span class="o">...</span></div> |
| |
| |
| <span class="c1"># Context manager support</span> |
| <div class="viewcode-block" id="CompatConnection.__enter__"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.CompatConnection.__enter__">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="fm">__enter__</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">CompatConnection</span><span class="p">:</span> <span class="o">...</span></div> |
| |
| <div class="viewcode-block" id="CompatConnection.__exit__"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.CompatConnection.__exit__">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="fm">__exit__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">exc_type</span><span class="p">:</span> <span class="n">Any</span><span class="p">,</span> <span class="n">exc_val</span><span class="p">:</span> <span class="n">Any</span><span class="p">,</span> <span class="n">exc_tb</span><span class="p">:</span> <span class="n">Any</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> <span class="o">...</span></div> |
| |
| |
| <span class="c1"># Common properties</span> |
| <span class="nd">@property</span> |
| <div class="viewcode-block" id="CompatConnection.notices"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.CompatConnection.notices">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">notices</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">list</span><span class="p">[</span><span class="n">Any</span><span class="p">]:</span> <span class="o">...</span></div> |
| |
| |
| <span class="c1"># psycopg3 specific (optional)</span> |
| <span class="nd">@property</span> |
| <div class="viewcode-block" id="CompatConnection.adapters"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.CompatConnection.adapters">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">adapters</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">Any</span><span class="p">:</span> <span class="o">...</span></div> |
| |
| |
| <span class="nd">@property</span> |
| <div class="viewcode-block" id="CompatConnection.row_factory"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.CompatConnection.row_factory">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">row_factory</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">Any</span><span class="p">:</span> <span class="o">...</span></div> |
| |
| |
| <span class="c1"># Optional method for psycopg3</span> |
| <div class="viewcode-block" id="CompatConnection.add_notice_handler"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.CompatConnection.add_notice_handler">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">add_notice_handler</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">handler</span><span class="p">:</span> <span class="n">Any</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> <span class="o">...</span></div> |
| </div> |
| |
| |
| |
| <div class="viewcode-block" id="PostgresHook"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook">[docs]</a> |
| <span class="k">class</span><span class="w"> </span><span class="nc">PostgresHook</span><span class="p">(</span><span class="n">DbApiHook</span><span class="p">):</span> |
| <span class="w"> </span><span class="sd">"""</span> |
| <span class="sd"> Interact with Postgres.</span> |
| |
| <span class="sd"> You can specify ssl parameters in the extra field of your connection</span> |
| <span class="sd"> as ``{"sslmode": "require", "sslcert": "/path/to/cert.pem", etc}``.</span> |
| <span class="sd"> Also, you can choose cursor as ``{"cursor": "dictcursor"}``. Refer to the</span> |
| <span class="sd"> psycopg2.extras or psycopg.rows for more details.</span> |
| |
| <span class="sd"> Note: For Redshift, use keepalives_idle in the extra connection parameters</span> |
| <span class="sd"> and set it to less than 300 seconds.</span> |
| |
| <span class="sd"> Note: For AWS IAM authentication, use iam in the extra connection parameters</span> |
| <span class="sd"> and set it to true. Leave the password field empty. This will use the</span> |
| <span class="sd"> "aws_default" connection to get the temporary token unless you override</span> |
| <span class="sd"> in extras.</span> |
| <span class="sd"> extras example: ``{"iam":true, "aws_conn_id":"my_aws_conn"}``</span> |
| |
| <span class="sd"> For Redshift, also use redshift in the extra connection parameters and</span> |
| <span class="sd"> set it to true. The cluster-identifier is extracted from the beginning of</span> |
| <span class="sd"> the host field, so is optional. It can however be overridden in the extra field.</span> |
| <span class="sd"> extras example: ``{"iam":true, "redshift":true, "cluster-identifier": "my_cluster_id"}``</span> |
| |
| <span class="sd"> For Redshift Serverless, use redshift-serverless in the extra connection parameters and</span> |
| <span class="sd"> set it to true. The workgroup-name is extracted from the beginning of</span> |
| <span class="sd"> the host field, so is optional. It can however be overridden in the extra field.</span> |
| <span class="sd"> extras example: ``{"iam":true, "redshift-serverless":true, "workgroup-name": "my_serverless_workgroup"}``</span> |
| |
| <span class="sd"> :param postgres_conn_id: The :ref:`postgres conn id <howto/connection:postgres>`</span> |
| <span class="sd"> reference to a specific postgres database.</span> |
| <span class="sd"> :param options: Optional. Specifies command-line options to send to the server</span> |
| <span class="sd"> at connection start. For example, setting this to ``-c search_path=myschema``</span> |
| <span class="sd"> sets the session's value of the ``search_path`` to ``myschema``.</span> |
| <span class="sd"> :param enable_log_db_messages: Optional. If enabled logs database messages sent to the client</span> |
| <span class="sd"> during the session. To avoid a memory leak psycopg2 only saves the last 50 messages.</span> |
| <span class="sd"> For details, see: `PostgreSQL logging configuration parameters</span> |
| <span class="sd"> <https://www.postgresql.org/docs/current/runtime-config-logging.html>`__</span> |
| <span class="sd"> """</span> |
| |
| <div class="viewcode-block" id="PostgresHook.conn_name_attr"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.conn_name_attr">[docs]</a> |
| <span class="n">conn_name_attr</span> <span class="o">=</span> <span class="s2">"postgres_conn_id"</span></div> |
| |
| <div class="viewcode-block" id="PostgresHook.default_conn_name"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.default_conn_name">[docs]</a> |
| <span class="n">default_conn_name</span> <span class="o">=</span> <span class="s2">"postgres_default"</span></div> |
| |
| <div class="viewcode-block" id="PostgresHook.default_client_log_level"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.default_client_log_level">[docs]</a> |
| <span class="n">default_client_log_level</span> <span class="o">=</span> <span class="s2">"warning"</span></div> |
| |
| <div class="viewcode-block" id="PostgresHook.default_connector_version"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.default_connector_version">[docs]</a> |
| <span class="n">default_connector_version</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">2</span></div> |
| |
| <div class="viewcode-block" id="PostgresHook.conn_type"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.conn_type">[docs]</a> |
| <span class="n">conn_type</span> <span class="o">=</span> <span class="s2">"postgres"</span></div> |
| |
| <div class="viewcode-block" id="PostgresHook.hook_name"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.hook_name">[docs]</a> |
| <span class="n">hook_name</span> <span class="o">=</span> <span class="s2">"Postgres"</span></div> |
| |
| <div class="viewcode-block" id="PostgresHook.supports_autocommit"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.supports_autocommit">[docs]</a> |
| <span class="n">supports_autocommit</span> <span class="o">=</span> <span class="kc">True</span></div> |
| |
| <div class="viewcode-block" id="PostgresHook.supports_executemany"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.supports_executemany">[docs]</a> |
| <span class="n">supports_executemany</span> <span class="o">=</span> <span class="kc">True</span></div> |
| |
| <div class="viewcode-block" id="PostgresHook.ignored_extra_options"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.ignored_extra_options">[docs]</a> |
| <span class="n">ignored_extra_options</span> <span class="o">=</span> <span class="p">{</span> |
| <span class="s2">"iam"</span><span class="p">,</span> |
| <span class="s2">"redshift"</span><span class="p">,</span> |
| <span class="s2">"redshift-serverless"</span><span class="p">,</span> |
| <span class="s2">"cursor"</span><span class="p">,</span> |
| <span class="s2">"cluster-identifier"</span><span class="p">,</span> |
| <span class="s2">"workgroup-name"</span><span class="p">,</span> |
| <span class="s2">"aws_conn_id"</span><span class="p">,</span> |
| <span class="s2">"sqlalchemy_scheme"</span><span class="p">,</span> |
| <span class="s2">"sqlalchemy_query"</span><span class="p">,</span> |
| <span class="s2">"azure_conn_id"</span><span class="p">,</span> |
| <span class="p">}</span></div> |
| |
| <div class="viewcode-block" id="PostgresHook.default_azure_oauth_scope"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.default_azure_oauth_scope">[docs]</a> |
| <span class="n">default_azure_oauth_scope</span> <span class="o">=</span> <span class="s2">"https://ossrdbms-aad.database.windows.net/.default"</span></div> |
| |
| |
| <span class="k">def</span><span class="w"> </span><span class="fm">__init__</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="n">options</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> <span class="n">enable_log_db_messages</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span> |
| <span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> |
| <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> |
| <div class="viewcode-block" id="PostgresHook.conn"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.conn">[docs]</a> |
| <span class="bp">self</span><span class="o">.</span><span class="n">conn</span><span class="p">:</span> <span class="n">CompatConnection</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span></div> |
| |
| <div class="viewcode-block" id="PostgresHook.database"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.database">[docs]</a> |
| <span class="bp">self</span><span class="o">.</span><span class="n">database</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="n">kwargs</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="s2">"database"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="PostgresHook.options"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.options">[docs]</a> |
| <span class="bp">self</span><span class="o">.</span><span class="n">options</span> <span class="o">=</span> <span class="n">options</span></div> |
| |
| <div class="viewcode-block" id="PostgresHook.enable_log_db_messages"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.enable_log_db_messages">[docs]</a> |
| <span class="bp">self</span><span class="o">.</span><span class="n">enable_log_db_messages</span> <span class="o">=</span> <span class="n">enable_log_db_messages</span></div> |
| |
| |
| <span class="nd">@staticmethod</span> |
| <span class="k">def</span><span class="w"> </span><span class="nf">__cast_nullable</span><span class="p">(</span><span class="n">value</span><span class="p">,</span> <span class="n">dst_type</span><span class="p">:</span> <span class="nb">type</span><span class="p">)</span> <span class="o">-></span> <span class="n">Any</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">dst_type</span><span class="p">(</span><span class="n">value</span><span class="p">)</span> <span class="k">if</span> <span class="n">value</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> <span class="k">else</span> <span class="kc">None</span> |
| |
| <span class="nd">@property</span> |
| <div class="viewcode-block" id="PostgresHook.sqlalchemy_url"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.sqlalchemy_url">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">sqlalchemy_url</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">URL</span><span class="p">:</span> |
| <span class="n">conn</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">connection</span> |
| <span class="n">query</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">extra_dejson</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"sqlalchemy_query"</span><span class="p">,</span> <span class="p">{})</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">query</span><span class="p">,</span> <span class="nb">dict</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span><span class="s2">"The parameter 'sqlalchemy_query' must be of type dict!"</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">conn</span><span class="o">.</span><span class="n">extra_dejson</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"iam"</span><span class="p">,</span> <span class="kc">False</span><span class="p">):</span> |
| <span class="n">conn</span><span class="o">.</span><span class="n">login</span><span class="p">,</span> <span class="n">conn</span><span class="o">.</span><span class="n">password</span><span class="p">,</span> <span class="n">conn</span><span class="o">.</span><span class="n">port</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_iam_token</span><span class="p">(</span><span class="n">conn</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">URL</span><span class="o">.</span><span class="n">create</span><span class="p">(</span> |
| <span class="n">drivername</span><span class="o">=</span><span class="s2">"postgresql+psycopg"</span> <span class="k">if</span> <span class="n">USE_PSYCOPG3</span> <span class="k">else</span> <span class="s2">"postgresql"</span><span class="p">,</span> |
| <span class="n">username</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">__cast_nullable</span><span class="p">(</span><span class="n">conn</span><span class="o">.</span><span class="n">login</span><span class="p">,</span> <span class="nb">str</span><span class="p">),</span> |
| <span class="n">password</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">__cast_nullable</span><span class="p">(</span><span class="n">conn</span><span class="o">.</span><span class="n">password</span><span class="p">,</span> <span class="nb">str</span><span class="p">),</span> |
| <span class="n">host</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">__cast_nullable</span><span class="p">(</span><span class="n">conn</span><span class="o">.</span><span class="n">host</span><span class="p">,</span> <span class="nb">str</span><span class="p">),</span> |
| <span class="n">port</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">__cast_nullable</span><span class="p">(</span><span class="n">conn</span><span class="o">.</span><span class="n">port</span><span class="p">,</span> <span class="nb">int</span><span class="p">),</span> |
| <span class="n">database</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">__cast_nullable</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">database</span><span class="p">,</span> <span class="nb">str</span><span class="p">)</span> <span class="ow">or</span> <span class="bp">self</span><span class="o">.</span><span class="n">__cast_nullable</span><span class="p">(</span><span class="n">conn</span><span class="o">.</span><span class="n">schema</span><span class="p">,</span> <span class="nb">str</span><span class="p">),</span> |
| <span class="n">query</span><span class="o">=</span><span class="n">query</span><span class="p">,</span> |
| <span class="p">)</span></div> |
| |
| |
| <span class="nd">@property</span> |
| <div class="viewcode-block" id="PostgresHook.dialect_name"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.dialect_name">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">dialect_name</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span> |
| <span class="k">return</span> <span class="s2">"postgresql"</span></div> |
| |
| |
| <span class="nd">@property</span> |
| <div class="viewcode-block" id="PostgresHook.dialect"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.dialect">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">dialect</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">Dialect</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">PostgresDialect</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span></div> |
| |
| |
| <span class="k">def</span><span class="w"> </span><span class="nf">_notice_handler</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">notice</span><span class="p">:</span> <span class="n">Diagnostic</span><span class="p">):</span> |
| <span class="w"> </span><span class="sd">"""Handle notices from the database and log them."""</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">notice</span><span class="o">.</span><span class="n">message_primary</span><span class="p">)</span><span class="o">.</span><span class="n">strip</span><span class="p">())</span> |
| |
| <span class="k">def</span><span class="w"> </span><span class="nf">_get_cursor</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">raw_cursor</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="n">CursorType</span><span class="p">:</span> |
| <span class="n">_cursor</span> <span class="o">=</span> <span class="n">raw_cursor</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> |
| <span class="k">if</span> <span class="n">USE_PSYCOPG3</span><span class="p">:</span> |
| <span class="k">if</span> <span class="n">_cursor</span> <span class="o">==</span> <span class="s2">"dictcursor"</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">dict_row</span> |
| <span class="k">if</span> <span class="n">_cursor</span> <span class="o">==</span> <span class="s2">"namedtuplecursor"</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">namedtuple_row</span> |
| <span class="k">if</span> <span class="n">_cursor</span> <span class="o">==</span> <span class="s2">"realdictcursor"</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span> |
| <span class="s2">"realdictcursor is not supported with psycopg3. Use dictcursor instead."</span> |
| <span class="p">)</span> |
| <span class="n">valid_cursors</span> <span class="o">=</span> <span class="s2">"dictcursor, namedtuplecursor"</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Invalid cursor passed </span><span class="si">{</span><span class="n">_cursor</span><span class="si">}</span><span class="s2">. Valid options are: </span><span class="si">{</span><span class="n">valid_cursors</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> |
| |
| <span class="n">cursor_types</span> <span class="o">=</span> <span class="p">{</span> |
| <span class="s2">"dictcursor"</span><span class="p">:</span> <span class="n">psycopg2</span><span class="o">.</span><span class="n">extras</span><span class="o">.</span><span class="n">DictCursor</span><span class="p">,</span> |
| <span class="s2">"realdictcursor"</span><span class="p">:</span> <span class="n">psycopg2</span><span class="o">.</span><span class="n">extras</span><span class="o">.</span><span class="n">RealDictCursor</span><span class="p">,</span> |
| <span class="s2">"namedtuplecursor"</span><span class="p">:</span> <span class="n">psycopg2</span><span class="o">.</span><span class="n">extras</span><span class="o">.</span><span class="n">NamedTupleCursor</span><span class="p">,</span> |
| <span class="p">}</span> |
| <span class="k">if</span> <span class="n">_cursor</span> <span class="ow">in</span> <span class="n">cursor_types</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">cursor_types</span><span class="p">[</span><span class="n">_cursor</span><span class="p">]</span> |
| <span class="n">valid_cursors</span> <span class="o">=</span> <span class="s2">", "</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">cursor_types</span><span class="o">.</span><span class="n">keys</span><span class="p">())</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Invalid cursor passed </span><span class="si">{</span><span class="n">_cursor</span><span class="si">}</span><span class="s2">. Valid options are: </span><span class="si">{</span><span class="n">valid_cursors</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> |
| |
| <span class="k">def</span><span class="w"> </span><span class="nf">_generate_cursor_name</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="w"> </span><span class="sd">"""Generate a unique name for server-side cursor."""</span> |
| <span class="kn">import</span><span class="w"> </span><span class="nn">uuid</span> |
| |
| <span class="k">return</span> <span class="sa">f</span><span class="s2">"airflow_cursor_</span><span class="si">{</span><span class="n">uuid</span><span class="o">.</span><span class="n">uuid4</span><span class="p">()</span><span class="o">.</span><span class="n">hex</span><span class="si">}</span><span class="s2">"</span> |
| |
| <div class="viewcode-block" id="PostgresHook.get_conn"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.get_conn">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">get_conn</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">CompatConnection</span><span class="p">:</span> |
| <span class="w"> </span><span class="sd">"""Establish a connection to a postgres database."""</span> |
| <span class="n">conn</span> <span class="o">=</span> <span class="n">deepcopy</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">connection</span><span class="p">)</span> |
| |
| <span class="k">if</span> <span class="n">conn</span><span class="o">.</span><span class="n">extra_dejson</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"iam"</span><span class="p">,</span> <span class="kc">False</span><span class="p">):</span> |
| <span class="n">login</span><span class="p">,</span> <span class="n">password</span><span class="p">,</span> <span class="n">port</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_iam_token</span><span class="p">(</span><span class="n">conn</span><span class="p">)</span> |
| <span class="n">conn</span><span class="o">.</span><span class="n">login</span> <span class="o">=</span> <span class="n">cast</span><span class="p">(</span><span class="s2">"Any"</span><span class="p">,</span> <span class="n">login</span><span class="p">)</span> |
| <span class="n">conn</span><span class="o">.</span><span class="n">password</span> <span class="o">=</span> <span class="n">cast</span><span class="p">(</span><span class="s2">"Any"</span><span class="p">,</span> <span class="n">password</span><span class="p">)</span> |
| <span class="n">conn</span><span class="o">.</span><span class="n">port</span> <span class="o">=</span> <span class="n">cast</span><span class="p">(</span><span class="s2">"Any"</span><span class="p">,</span> <span class="n">port</span><span class="p">)</span> |
| |
| <span class="n">conn_args</span><span class="p">:</span> <span class="nb">dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">Any</span><span class="p">]</span> <span class="o">=</span> <span class="p">{</span> |
| <span class="s2">"host"</span><span class="p">:</span> <span class="n">conn</span><span class="o">.</span><span class="n">host</span><span class="p">,</span> |
| <span class="s2">"user"</span><span class="p">:</span> <span class="n">conn</span><span class="o">.</span><span class="n">login</span><span class="p">,</span> |
| <span class="s2">"password"</span><span class="p">:</span> <span class="n">conn</span><span class="o">.</span><span class="n">password</span><span class="p">,</span> |
| <span class="s2">"dbname"</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">database</span> <span class="ow">or</span> <span class="n">conn</span><span class="o">.</span><span class="n">schema</span><span class="p">,</span> |
| <span class="s2">"port"</span><span class="p">:</span> <span class="n">conn</span><span class="o">.</span><span class="n">port</span><span class="p">,</span> |
| <span class="p">}</span> |
| |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">options</span><span class="p">:</span> |
| <span class="n">conn_args</span><span class="p">[</span><span class="s2">"options"</span><span class="p">]</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">options</span> |
| |
| <span class="c1"># Add extra connection arguments</span> |
| <span class="k">for</span> <span class="n">arg_name</span><span class="p">,</span> <span class="n">arg_val</span> <span class="ow">in</span> <span class="n">conn</span><span class="o">.</span><span class="n">extra_dejson</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> |
| <span class="k">if</span> <span class="n">arg_name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">ignored_extra_options</span><span class="p">:</span> |
| <span class="n">conn_args</span><span class="p">[</span><span class="n">arg_name</span><span class="p">]</span> <span class="o">=</span> <span class="n">arg_val</span> |
| |
| <span class="k">if</span> <span class="n">USE_PSYCOPG3</span><span class="p">:</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">psycopg.connection</span><span class="w"> </span><span class="kn">import</span> <span class="n">Connection</span> <span class="k">as</span> <span class="n">pgConnection</span> |
| |
| <span class="n">raw_cursor</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">extra_dejson</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"cursor"</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">raw_cursor</span><span class="p">:</span> |
| <span class="n">conn_args</span><span class="p">[</span><span class="s2">"row_factory"</span><span class="p">]</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_cursor</span><span class="p">(</span><span class="n">raw_cursor</span><span class="p">)</span> |
| |
| <span class="c1"># Use Any type for the connection args to avoid type conflicts</span> |
| <span class="n">connection</span> <span class="o">=</span> <span class="n">pgConnection</span><span class="o">.</span><span class="n">connect</span><span class="p">(</span><span class="o">**</span><span class="n">cast</span><span class="p">(</span><span class="s2">"Any"</span><span class="p">,</span> <span class="n">conn_args</span><span class="p">))</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">conn</span> <span class="o">=</span> <span class="n">cast</span><span class="p">(</span><span class="s2">"CompatConnection"</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span> |
| |
| <span class="c1"># Register JSON handlers for both json and jsonb types</span> |
| <span class="c1"># This ensures JSON data is properly decoded from bytes to Python objects</span> |
| <span class="n">register_default_adapters</span><span class="p">(</span><span class="n">connection</span><span class="p">)</span> |
| |
| <span class="c1"># Add the notice handler AFTER the connection is established</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">enable_log_db_messages</span> <span class="ow">and</span> <span class="nb">hasattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">conn</span><span class="p">,</span> <span class="s2">"add_notice_handler"</span><span class="p">):</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">conn</span><span class="o">.</span><span class="n">add_notice_handler</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_notice_handler</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> <span class="c1"># psycopg2</span> |
| <span class="n">raw_cursor</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">extra_dejson</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"cursor"</span><span class="p">,</span> <span class="kc">False</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">raw_cursor</span><span class="p">:</span> |
| <span class="n">conn_args</span><span class="p">[</span><span class="s2">"cursor_factory"</span><span class="p">]</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_cursor</span><span class="p">(</span><span class="n">raw_cursor</span><span class="p">)</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">conn</span> <span class="o">=</span> <span class="n">cast</span><span class="p">(</span><span class="s2">"CompatConnection"</span><span class="p">,</span> <span class="n">psycopg2</span><span class="o">.</span><span class="n">connect</span><span class="p">(</span><span class="o">**</span><span class="n">conn_args</span><span class="p">))</span> |
| |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">conn</span></div> |
| |
| |
| <span class="nd">@overload</span> |
| <div class="viewcode-block" id="PostgresHook.get_df"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.get_df">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">get_df</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> |
| <span class="n">sql</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="nb">list</span><span class="p">[</span><span class="nb">str</span><span class="p">],</span> |
| <span class="n">parameters</span><span class="p">:</span> <span class="nb">list</span> <span class="o">|</span> <span class="nb">tuple</span> <span class="o">|</span> <span class="n">Mapping</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">Any</span><span class="p">]</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="o">*</span><span class="p">,</span> |
| <span class="n">df_type</span><span class="p">:</span> <span class="n">Literal</span><span class="p">[</span><span class="s2">"pandas"</span><span class="p">]</span> <span class="o">=</span> <span class="s2">"pandas"</span><span class="p">,</span> |
| <span class="o">**</span><span class="n">kwargs</span><span class="p">:</span> <span class="n">Any</span><span class="p">,</span> |
| <span class="p">)</span> <span class="o">-></span> <span class="n">PandasDataFrame</span><span class="p">:</span> <span class="o">...</span></div> |
| |
| |
| <span class="nd">@overload</span> |
| <span class="k">def</span><span class="w"> </span><span class="nf">get_df</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> |
| <span class="n">sql</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="nb">list</span><span class="p">[</span><span class="nb">str</span><span class="p">],</span> |
| <span class="n">parameters</span><span class="p">:</span> <span class="nb">list</span> <span class="o">|</span> <span class="nb">tuple</span> <span class="o">|</span> <span class="n">Mapping</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">Any</span><span class="p">]</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="o">*</span><span class="p">,</span> |
| <span class="n">df_type</span><span class="p">:</span> <span class="n">Literal</span><span class="p">[</span><span class="s2">"polars"</span><span class="p">]</span> <span class="o">=</span> <span class="o">...</span><span class="p">,</span> |
| <span class="o">**</span><span class="n">kwargs</span><span class="p">:</span> <span class="n">Any</span><span class="p">,</span> |
| <span class="p">)</span> <span class="o">-></span> <span class="n">PolarsDataFrame</span><span class="p">:</span> <span class="o">...</span> |
| |
| <span class="k">def</span><span class="w"> </span><span class="nf">get_df</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> |
| <span class="n">sql</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="nb">list</span><span class="p">[</span><span class="nb">str</span><span class="p">],</span> |
| <span class="n">parameters</span><span class="p">:</span> <span class="nb">list</span> <span class="o">|</span> <span class="nb">tuple</span> <span class="o">|</span> <span class="n">Mapping</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">Any</span><span class="p">]</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="o">*</span><span class="p">,</span> |
| <span class="n">df_type</span><span class="p">:</span> <span class="n">Literal</span><span class="p">[</span><span class="s2">"pandas"</span><span class="p">,</span> <span class="s2">"polars"</span><span class="p">]</span> <span class="o">=</span> <span class="s2">"pandas"</span><span class="p">,</span> |
| <span class="o">**</span><span class="n">kwargs</span><span class="p">:</span> <span class="n">Any</span><span class="p">,</span> |
| <span class="p">)</span> <span class="o">-></span> <span class="n">PandasDataFrame</span> <span class="o">|</span> <span class="n">PolarsDataFrame</span><span class="p">:</span> |
| <span class="w"> </span><span class="sd">"""</span> |
| <span class="sd"> Execute the sql and returns a dataframe.</span> |
| |
| <span class="sd"> :param sql: the sql statement to be executed (str) or a list of sql statements to execute</span> |
| <span class="sd"> :param parameters: The parameters to render the SQL query with.</span> |
| <span class="sd"> :param df_type: Type of dataframe to return, either "pandas" or "polars"</span> |
| <span class="sd"> :param kwargs: (optional) passed into `pandas.io.sql.read_sql` or `polars.read_database` method</span> |
| <span class="sd"> :return: A pandas or polars DataFrame containing the query results.</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="n">df_type</span> <span class="o">==</span> <span class="s2">"pandas"</span><span class="p">:</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">pandas.io</span><span class="w"> </span><span class="kn">import</span> <span class="n">sql</span> <span class="k">as</span> <span class="n">psql</span> |
| <span class="k">except</span> <span class="ne">ImportError</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="n">AirflowOptionalProviderFeatureException</span><span class="p">(</span> |
| <span class="s2">"pandas library not installed, run: pip install "</span> |
| <span class="s2">"'apache-airflow-providers-common-sql[pandas]'."</span> |
| <span class="p">)</span> |
| |
| <span class="n">engine</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_sqlalchemy_engine</span><span class="p">()</span> |
| <span class="k">with</span> <span class="n">engine</span><span class="o">.</span><span class="n">connect</span><span class="p">()</span> <span class="k">as</span> <span class="n">conn</span><span class="p">:</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">sql</span><span class="p">,</span> <span class="nb">list</span><span class="p">):</span> |
| <span class="n">sql</span> <span class="o">=</span> <span class="s2">"; "</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">sql</span><span class="p">)</span> <span class="c1"># Or handle multiple queries differently</span> |
| <span class="k">return</span> <span class="n">cast</span><span class="p">(</span><span class="s2">"PandasDataFrame"</span><span class="p">,</span> <span class="n">psql</span><span class="o">.</span><span class="n">read_sql</span><span class="p">(</span><span class="n">sql</span><span class="p">,</span> <span class="n">con</span><span class="o">=</span><span class="n">conn</span><span class="p">,</span> <span class="n">params</span><span class="o">=</span><span class="n">parameters</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">))</span> |
| |
| <span class="k">elif</span> <span class="n">df_type</span> <span class="o">==</span> <span class="s2">"polars"</span><span class="p">:</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_polars_df</span><span class="p">(</span><span class="n">sql</span><span class="p">,</span> <span class="n">parameters</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> |
| |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unsupported df_type: </span><span class="si">{</span><span class="n">df_type</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> |
| |
| <div class="viewcode-block" id="PostgresHook.copy_expert"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.copy_expert">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">copy_expert</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">sql</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">filename</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> |
| <span class="w"> </span><span class="sd">"""</span> |
| <span class="sd"> Execute SQL using psycopg's ``copy_expert`` method.</span> |
| |
| <span class="sd"> Necessary to execute COPY command without access to a superuser.</span> |
| |
| <span class="sd"> Note: if this method is called with a "COPY FROM" statement and</span> |
| <span class="sd"> the specified input file does not exist, it creates an empty</span> |
| <span class="sd"> file and no data is loaded, but the operation succeeds.</span> |
| <span class="sd"> So if users want to be aware when the input file does not exist,</span> |
| <span class="sd"> they have to check its existence by themselves.</span> |
| <span class="sd"> """</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s2">"Running copy expert: </span><span class="si">%s</span><span class="s2">, filename: </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">sql</span><span class="p">,</span> <span class="n">filename</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">USE_PSYCOPG3</span><span class="p">:</span> |
| <span class="k">if</span> <span class="s2">" from stdin"</span> <span class="ow">in</span> <span class="n">sql</span><span class="o">.</span><span class="n">lower</span><span class="p">():</span> |
| <span class="c1"># Handle COPY FROM STDIN: read from the file and write to the database.</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">isfile</span><span class="p">(</span><span class="n">filename</span><span class="p">):</span> |
| <span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">filename</span><span class="p">,</span> <span class="s2">"w"</span><span class="p">):</span> |
| <span class="k">pass</span> <span class="c1"># Create an empty file to prevent errors.</span> |
| |
| <span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">filename</span><span class="p">,</span> <span class="s2">"rb"</span><span class="p">)</span> <span class="k">as</span> <span class="n">file</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_conn</span><span class="p">()</span> <span class="k">as</span> <span class="n">conn</span><span class="p">,</span> <span class="n">conn</span><span class="o">.</span><span class="n">cursor</span><span class="p">()</span> <span class="k">as</span> <span class="n">cur</span><span class="p">:</span> |
| <span class="k">with</span> <span class="n">cur</span><span class="o">.</span><span class="n">copy</span><span class="p">(</span><span class="n">sql</span><span class="p">)</span> <span class="k">as</span> <span class="n">copy</span><span class="p">:</span> |
| <span class="k">while</span> <span class="n">data</span> <span class="o">:=</span> <span class="n">file</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="mi">8192</span><span class="p">):</span> |
| <span class="n">copy</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">data</span><span class="p">)</span> |
| <span class="n">conn</span><span class="o">.</span><span class="n">commit</span><span class="p">()</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="c1"># Handle COPY TO STDOUT: read from the database and write to the file.</span> |
| <span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">filename</span><span class="p">,</span> <span class="s2">"wb"</span><span class="p">)</span> <span class="k">as</span> <span class="n">file</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_conn</span><span class="p">()</span> <span class="k">as</span> <span class="n">conn</span><span class="p">,</span> <span class="n">conn</span><span class="o">.</span><span class="n">cursor</span><span class="p">()</span> <span class="k">as</span> <span class="n">cur</span><span class="p">:</span> |
| <span class="k">with</span> <span class="n">cur</span><span class="o">.</span><span class="n">copy</span><span class="p">(</span><span class="n">sql</span><span class="p">)</span> <span class="k">as</span> <span class="n">copy</span><span class="p">:</span> |
| <span class="k">for</span> <span class="n">data</span> <span class="ow">in</span> <span class="n">copy</span><span class="p">:</span> |
| <span class="n">file</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">data</span><span class="p">)</span> |
| <span class="n">conn</span><span class="o">.</span><span class="n">commit</span><span class="p">()</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">isfile</span><span class="p">(</span><span class="n">filename</span><span class="p">):</span> |
| <span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">filename</span><span class="p">,</span> <span class="s2">"w"</span><span class="p">):</span> |
| <span class="k">pass</span> |
| |
| <span class="k">with</span> <span class="p">(</span> |
| <span class="nb">open</span><span class="p">(</span><span class="n">filename</span><span class="p">,</span> <span class="s2">"r+"</span><span class="p">)</span> <span class="k">as</span> <span class="n">file</span><span class="p">,</span> |
| <span class="n">closing</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">get_conn</span><span class="p">())</span> <span class="k">as</span> <span class="n">conn</span><span class="p">,</span> |
| <span class="n">closing</span><span class="p">(</span><span class="n">conn</span><span class="o">.</span><span class="n">cursor</span><span class="p">())</span> <span class="k">as</span> <span class="n">cur</span><span class="p">,</span> |
| <span class="p">):</span> |
| <span class="n">cur</span><span class="o">.</span><span class="n">copy_expert</span><span class="p">(</span><span class="n">sql</span><span class="p">,</span> <span class="n">file</span><span class="p">)</span> |
| <span class="n">file</span><span class="o">.</span><span class="n">truncate</span><span class="p">(</span><span class="n">file</span><span class="o">.</span><span class="n">tell</span><span class="p">())</span> |
| <span class="n">conn</span><span class="o">.</span><span class="n">commit</span><span class="p">()</span></div> |
| |
| |
| <div class="viewcode-block" id="PostgresHook.get_uri"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.get_uri">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">get_uri</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span> |
| <span class="w"> </span><span class="sd">"""</span> |
| <span class="sd"> Extract the URI from the connection.</span> |
| |
| <span class="sd"> :return: the extracted URI in Sqlalchemy URI format.</span> |
| <span class="sd"> """</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">sqlalchemy_url</span><span class="o">.</span><span class="n">render_as_string</span><span class="p">(</span><span class="n">hide_password</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span></div> |
| |
| |
| <div class="viewcode-block" id="PostgresHook.bulk_load"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.bulk_load">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">bulk_load</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">tmp_file</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> |
| <span class="w"> </span><span class="sd">"""Load a tab-delimited file into a database table."""</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">copy_expert</span><span class="p">(</span><span class="sa">f</span><span class="s2">"COPY </span><span class="si">{</span><span class="n">table</span><span class="si">}</span><span class="s2"> FROM STDIN"</span><span class="p">,</span> <span class="n">tmp_file</span><span class="p">)</span></div> |
| |
| |
| <div class="viewcode-block" id="PostgresHook.bulk_dump"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.bulk_dump">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">bulk_dump</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">tmp_file</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> |
| <span class="w"> </span><span class="sd">"""Dump a database table into a tab-delimited file."""</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">copy_expert</span><span class="p">(</span><span class="sa">f</span><span class="s2">"COPY </span><span class="si">{</span><span class="n">table</span><span class="si">}</span><span class="s2"> TO STDOUT"</span><span class="p">,</span> <span class="n">tmp_file</span><span class="p">)</span></div> |
| |
| |
| <span class="nd">@staticmethod</span> |
| <span class="k">def</span><span class="w"> </span><span class="nf">_serialize_cell_ppg2</span><span class="p">(</span><span class="n">cell</span><span class="p">:</span> <span class="nb">object</span><span class="p">,</span> <span class="n">conn</span><span class="p">:</span> <span class="n">CompatConnection</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">)</span> <span class="o">-></span> <span class="n">Any</span><span class="p">:</span> |
| <span class="w"> </span><span class="sd">"""</span> |
| <span class="sd"> Serialize a cell using psycopg2.</span> |
| |
| <span class="sd"> Psycopg2 adapts all arguments to the ``execute()`` method internally,</span> |
| <span class="sd"> hence we return the cell without any conversion.</span> |
| |
| <span class="sd"> See https://www.psycopg.org/docs/extensions.html#sql-adaptation-protocol-objects</span> |
| <span class="sd"> for more information.</span> |
| |
| <span class="sd"> To perform custom type adaptation please use register_adapter function</span> |
| <span class="sd"> https://www.psycopg.org/docs/extensions.html#psycopg2.extensions.register_adapter.</span> |
| |
| <span class="sd"> :param cell: The cell to insert into the table</span> |
| <span class="sd"> :param conn: The database connection</span> |
| <span class="sd"> :return: The cell</span> |
| <span class="sd"> """</span> |
| <span class="k">return</span> <span class="n">cell</span> |
| |
| <span class="nd">@staticmethod</span> |
| <span class="k">def</span><span class="w"> </span><span class="nf">_serialize_cell_ppg3</span><span class="p">(</span><span class="n">cell</span><span class="p">:</span> <span class="nb">object</span><span class="p">,</span> <span class="n">conn</span><span class="p">:</span> <span class="n">CompatConnection</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">)</span> <span class="o">-></span> <span class="n">Any</span><span class="p">:</span> |
| <span class="w"> </span><span class="sd">"""Serialize a cell using psycopg3."""</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">cell</span><span class="p">,</span> <span class="p">(</span><span class="nb">dict</span><span class="p">,</span> <span class="nb">list</span><span class="p">)):</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">psycopg.types.json</span><span class="w"> </span><span class="kn">import</span> <span class="n">Json</span> |
| |
| <span class="k">return</span> <span class="n">Json</span><span class="p">(</span><span class="n">cell</span><span class="p">)</span> |
| <span class="k">except</span> <span class="ne">ImportError</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">cell</span> |
| <span class="k">return</span> <span class="n">cell</span> |
| |
| <span class="nd">@staticmethod</span> |
| <span class="k">def</span><span class="w"> </span><span class="nf">_serialize_cell</span><span class="p">(</span><span class="n">cell</span><span class="p">:</span> <span class="nb">object</span><span class="p">,</span> <span class="n">conn</span><span class="p">:</span> <span class="n">Any</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">)</span> <span class="o">-></span> <span class="n">Any</span><span class="p">:</span> |
| <span class="k">if</span> <span class="n">USE_PSYCOPG3</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">PostgresHook</span><span class="o">.</span><span class="n">_serialize_cell_ppg3</span><span class="p">(</span><span class="n">cell</span><span class="p">,</span> <span class="n">conn</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">PostgresHook</span><span class="o">.</span><span class="n">_serialize_cell_ppg2</span><span class="p">(</span><span class="n">cell</span><span class="p">,</span> <span class="n">conn</span><span class="p">)</span> |
| |
| <div class="viewcode-block" id="PostgresHook.get_iam_token"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.get_iam_token">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">get_iam_token</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">conn</span><span class="p">:</span> <span class="n">Connection</span><span class="p">)</span> <span class="o">-></span> <span class="nb">tuple</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">,</span> <span class="nb">int</span><span class="p">]:</span> |
| <span class="w"> </span><span class="sd">"""Get the IAM token from different identity providers."""</span> |
| <span class="k">if</span> <span class="n">conn</span><span class="o">.</span><span class="n">extra_dejson</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"azure_conn_id"</span><span class="p">):</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_azure_iam_token</span><span class="p">(</span><span class="n">conn</span><span class="p">)</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_aws_iam_token</span><span class="p">(</span><span class="n">conn</span><span class="p">)</span></div> |
| |
| |
| <div class="viewcode-block" id="PostgresHook.get_aws_iam_token"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.get_aws_iam_token">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">get_aws_iam_token</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">conn</span><span class="p">:</span> <span class="n">Connection</span><span class="p">)</span> <span class="o">-></span> <span class="nb">tuple</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">,</span> <span class="nb">int</span><span class="p">]:</span> |
| <span class="w"> </span><span class="sd">"""</span> |
| <span class="sd"> Get the AWS IAM token.</span> |
| |
| <span class="sd"> This uses AWSHook to retrieve a temporary password to connect to</span> |
| <span class="sd"> Postgres or Redshift. Port is required. If none is provided, the default</span> |
| <span class="sd"> 5432 is used.</span> |
| <span class="sd"> """</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">airflow.providers.amazon.aws.hooks.base_aws</span><span class="w"> </span><span class="kn">import</span> <span class="n">AwsBaseHook</span> |
| <span class="k">except</span> <span class="ne">ImportError</span><span class="p">:</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">airflow.exceptions</span><span class="w"> </span><span class="kn">import</span> <span class="n">AirflowOptionalProviderFeatureException</span> |
| |
| <span class="k">raise</span> <span class="n">AirflowOptionalProviderFeatureException</span><span class="p">(</span> |
| <span class="s2">"apache-airflow-providers-amazon not installed, run: "</span> |
| <span class="s2">"pip install 'apache-airflow-providers-postgres[amazon]'."</span> |
| <span class="p">)</span> |
| |
| <span class="n">aws_conn_id</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">extra_dejson</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"aws_conn_id"</span><span class="p">,</span> <span class="s2">"aws_default"</span><span class="p">)</span> |
| <span class="n">login</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">login</span> |
| <span class="k">if</span> <span class="n">conn</span><span class="o">.</span><span class="n">extra_dejson</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"redshift"</span><span class="p">,</span> <span class="kc">False</span><span class="p">):</span> |
| <span class="n">port</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">port</span> <span class="ow">or</span> <span class="mi">5439</span> |
| <span class="c1"># Pull the custer-identifier from the beginning of the Redshift URL</span> |
| <span class="c1"># ex. my-cluster.ccdre4hpd39h.us-east-1.redshift.amazonaws.com returns my-cluster</span> |
| <span class="n">cluster_identifier</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">extra_dejson</span><span class="o">.</span><span class="n">get</span><span class="p">(</span> |
| <span class="s2">"cluster-identifier"</span><span class="p">,</span> <span class="n">cast</span><span class="p">(</span><span class="s2">"str"</span><span class="p">,</span> <span class="n">conn</span><span class="o">.</span><span class="n">host</span><span class="p">)</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s2">"."</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span> |
| <span class="p">)</span> |
| <span class="n">redshift_client</span> <span class="o">=</span> <span class="n">AwsBaseHook</span><span class="p">(</span><span class="n">aws_conn_id</span><span class="o">=</span><span class="n">aws_conn_id</span><span class="p">,</span> <span class="n">client_type</span><span class="o">=</span><span class="s2">"redshift"</span><span class="p">)</span><span class="o">.</span><span class="n">conn</span> |
| <span class="c1"># https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/redshift/client/get_cluster_credentials.html#Redshift.Client.get_cluster_credentials</span> |
| <span class="n">cluster_creds</span> <span class="o">=</span> <span class="n">redshift_client</span><span class="o">.</span><span class="n">get_cluster_credentials</span><span class="p">(</span> |
| <span class="n">DbUser</span><span class="o">=</span><span class="n">login</span><span class="p">,</span> |
| <span class="n">DbName</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">database</span> <span class="ow">or</span> <span class="n">conn</span><span class="o">.</span><span class="n">schema</span><span class="p">,</span> |
| <span class="n">ClusterIdentifier</span><span class="o">=</span><span class="n">cluster_identifier</span><span class="p">,</span> |
| <span class="n">AutoCreate</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="n">token</span> <span class="o">=</span> <span class="n">cluster_creds</span><span class="p">[</span><span class="s2">"DbPassword"</span><span class="p">]</span> |
| <span class="n">login</span> <span class="o">=</span> <span class="n">cluster_creds</span><span class="p">[</span><span class="s2">"DbUser"</span><span class="p">]</span> |
| <span class="k">elif</span> <span class="n">conn</span><span class="o">.</span><span class="n">extra_dejson</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"redshift-serverless"</span><span class="p">,</span> <span class="kc">False</span><span class="p">):</span> |
| <span class="n">port</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">port</span> <span class="ow">or</span> <span class="mi">5439</span> |
| <span class="c1"># Pull the workgroup-name from the query params/extras, if not there then pull it from the</span> |
| <span class="c1"># beginning of the Redshift URL</span> |
| <span class="c1"># ex. workgroup-name.ccdre4hpd39h.us-east-1.redshift.amazonaws.com returns workgroup-name</span> |
| <span class="n">workgroup_name</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">extra_dejson</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"workgroup-name"</span><span class="p">,</span> <span class="n">cast</span><span class="p">(</span><span class="s2">"str"</span><span class="p">,</span> <span class="n">conn</span><span class="o">.</span><span class="n">host</span><span class="p">)</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s2">"."</span><span class="p">)[</span><span class="mi">0</span><span class="p">])</span> |
| <span class="n">redshift_serverless_client</span> <span class="o">=</span> <span class="n">AwsBaseHook</span><span class="p">(</span> |
| <span class="n">aws_conn_id</span><span class="o">=</span><span class="n">aws_conn_id</span><span class="p">,</span> <span class="n">client_type</span><span class="o">=</span><span class="s2">"redshift-serverless"</span> |
| <span class="p">)</span><span class="o">.</span><span class="n">conn</span> |
| <span class="c1"># https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/redshift-serverless/client/get_credentials.html#RedshiftServerless.Client.get_credentials</span> |
| <span class="n">cluster_creds</span> <span class="o">=</span> <span class="n">redshift_serverless_client</span><span class="o">.</span><span class="n">get_credentials</span><span class="p">(</span> |
| <span class="n">dbName</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">database</span> <span class="ow">or</span> <span class="n">conn</span><span class="o">.</span><span class="n">schema</span><span class="p">,</span> |
| <span class="n">workgroupName</span><span class="o">=</span><span class="n">workgroup_name</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="n">token</span> <span class="o">=</span> <span class="n">cluster_creds</span><span class="p">[</span><span class="s2">"dbPassword"</span><span class="p">]</span> |
| <span class="n">login</span> <span class="o">=</span> <span class="n">cluster_creds</span><span class="p">[</span><span class="s2">"dbUser"</span><span class="p">]</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">port</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">port</span> <span class="ow">or</span> <span class="mi">5432</span> |
| <span class="n">rds_client</span> <span class="o">=</span> <span class="n">AwsBaseHook</span><span class="p">(</span><span class="n">aws_conn_id</span><span class="o">=</span><span class="n">aws_conn_id</span><span class="p">,</span> <span class="n">client_type</span><span class="o">=</span><span class="s2">"rds"</span><span class="p">)</span><span class="o">.</span><span class="n">conn</span> |
| <span class="c1"># https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/rds/client/generate_db_auth_token.html#RDS.Client.generate_db_auth_token</span> |
| <span class="n">token</span> <span class="o">=</span> <span class="n">rds_client</span><span class="o">.</span><span class="n">generate_db_auth_token</span><span class="p">(</span><span class="n">conn</span><span class="o">.</span><span class="n">host</span><span class="p">,</span> <span class="n">port</span><span class="p">,</span> <span class="n">conn</span><span class="o">.</span><span class="n">login</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">cast</span><span class="p">(</span><span class="s2">"str"</span><span class="p">,</span> <span class="n">login</span><span class="p">),</span> <span class="n">cast</span><span class="p">(</span><span class="s2">"str"</span><span class="p">,</span> <span class="n">token</span><span class="p">),</span> <span class="n">port</span></div> |
| |
| |
| <div class="viewcode-block" id="PostgresHook.get_azure_iam_token"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.get_azure_iam_token">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">get_azure_iam_token</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">conn</span><span class="p">:</span> <span class="n">Connection</span><span class="p">)</span> <span class="o">-></span> <span class="nb">tuple</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">,</span> <span class="nb">int</span><span class="p">]:</span> |
| <span class="w"> </span><span class="sd">"""</span> |
| <span class="sd"> Get the Azure IAM token.</span> |
| |
| <span class="sd"> This uses AzureBaseHook to retrieve an OAUTH token to connect to Postgres.</span> |
| <span class="sd"> Scope for the OAuth token can be set in the config option ``azure_oauth_scope`` under the section ``[postgres]``.</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="n">TYPE_CHECKING</span><span class="p">:</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">airflow.providers.microsoft.azure.hooks.base_azure</span><span class="w"> </span><span class="kn">import</span> <span class="n">AzureBaseHook</span> |
| |
| <span class="n">azure_conn_id</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">extra_dejson</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"azure_conn_id"</span><span class="p">,</span> <span class="s2">"azure_default"</span><span class="p">)</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="n">azure_conn</span> <span class="o">=</span> <span class="n">Connection</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">azure_conn_id</span><span class="p">)</span> |
| <span class="k">except</span> <span class="ne">AttributeError</span><span class="p">:</span> |
| <span class="n">azure_conn</span> <span class="o">=</span> <span class="n">Connection</span><span class="o">.</span><span class="n">get_connection_from_secrets</span><span class="p">(</span><span class="n">azure_conn_id</span><span class="p">)</span> <span class="c1"># type: ignore[attr-defined]</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="n">azure_base_hook</span><span class="p">:</span> <span class="n">AzureBaseHook</span> <span class="o">=</span> <span class="n">azure_conn</span><span class="o">.</span><span class="n">get_hook</span><span class="p">()</span> |
| <span class="k">except</span> <span class="ne">TypeError</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span> |
| <span class="k">if</span> <span class="s2">"required positional argument: 'sdk_client'"</span> <span class="ow">in</span> <span class="nb">str</span><span class="p">(</span><span class="n">e</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="n">AirflowOptionalProviderFeatureException</span><span class="p">(</span> |
| <span class="s2">"Getting azure token is not supported by current version of 'AzureBaseHook'. "</span> |
| <span class="s2">"Please upgrade apache-airflow-providers-microsoft-azure>=12.8.0"</span> |
| <span class="p">)</span> <span class="kn">from</span><span class="w"> </span><span class="nn">e</span> |
| <span class="k">raise</span> |
| <span class="n">scope</span> <span class="o">=</span> <span class="n">conf</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"postgres"</span><span class="p">,</span> <span class="s2">"azure_oauth_scope"</span><span class="p">,</span> <span class="n">fallback</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">default_azure_oauth_scope</span><span class="p">)</span> |
| <span class="n">token</span> <span class="o">=</span> <span class="n">azure_base_hook</span><span class="o">.</span><span class="n">get_token</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span><span class="o">.</span><span class="n">token</span> |
| <span class="k">return</span> <span class="n">cast</span><span class="p">(</span><span class="s2">"str"</span><span class="p">,</span> <span class="n">conn</span><span class="o">.</span><span class="n">login</span> <span class="ow">or</span> <span class="n">azure_conn</span><span class="o">.</span><span class="n">login</span><span class="p">),</span> <span class="n">token</span><span class="p">,</span> <span class="n">conn</span><span class="o">.</span><span class="n">port</span> <span class="ow">or</span> <span class="mi">5432</span></div> |
| |
| |
| <div class="viewcode-block" id="PostgresHook.get_table_primary_key"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.get_table_primary_key">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">get_table_primary_key</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">schema</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="s2">"public"</span><span class="p">)</span> <span class="o">-></span> <span class="nb">list</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">|</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="w"> </span><span class="sd">"""</span> |
| <span class="sd"> Get the table's primary key.</span> |
| |
| <span class="sd"> :param table: Name of the target table</span> |
| <span class="sd"> :param schema: Name of the target schema, public by default</span> |
| <span class="sd"> :return: Primary key columns list</span> |
| <span class="sd"> """</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">dialect</span><span class="o">.</span><span class="n">get_primary_keys</span><span class="p">(</span><span class="n">table</span><span class="o">=</span><span class="n">table</span><span class="p">,</span> <span class="n">schema</span><span class="o">=</span><span class="n">schema</span><span class="p">)</span></div> |
| |
| |
| <div class="viewcode-block" id="PostgresHook.get_openlineage_database_info"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.get_openlineage_database_info">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">get_openlineage_database_info</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span> <span class="o">-></span> <span class="n">DatabaseInfo</span><span class="p">:</span> |
| <span class="w"> </span><span class="sd">"""Return Postgres/Redshift specific information for OpenLineage."""</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">airflow.providers.openlineage.sqlparser</span><span class="w"> </span><span class="kn">import</span> <span class="n">DatabaseInfo</span> |
| |
| <span class="n">is_redshift</span> <span class="o">=</span> <span class="n">connection</span><span class="o">.</span><span class="n">extra_dejson</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"redshift"</span><span class="p">,</span> <span class="kc">False</span><span class="p">)</span> |
| |
| <span class="k">if</span> <span class="n">is_redshift</span><span class="p">:</span> |
| <span class="n">authority</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_openlineage_redshift_authority_part</span><span class="p">(</span><span class="n">connection</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">authority</span> <span class="o">=</span> <span class="n">DbApiHook</span><span class="o">.</span><span class="n">get_openlineage_authority_part</span><span class="p">(</span><span class="n">connection</span><span class="p">,</span> <span class="n">default_port</span><span class="o">=</span><span class="mi">5432</span><span class="p">)</span> |
| |
| <span class="k">return</span> <span class="n">DatabaseInfo</span><span class="p">(</span> |
| <span class="n">scheme</span><span class="o">=</span><span class="s2">"postgres"</span> <span class="k">if</span> <span class="ow">not</span> <span class="n">is_redshift</span> <span class="k">else</span> <span class="s2">"redshift"</span><span class="p">,</span> |
| <span class="n">authority</span><span class="o">=</span><span class="n">authority</span><span class="p">,</span> |
| <span class="n">database</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">database</span> <span class="ow">or</span> <span class="n">connection</span><span class="o">.</span><span class="n">schema</span><span class="p">,</span> |
| <span class="p">)</span></div> |
| |
| |
| <span class="k">def</span><span class="w"> </span><span class="nf">_get_openlineage_redshift_authority_part</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">airflow.providers.amazon.aws.hooks.base_aws</span><span class="w"> </span><span class="kn">import</span> <span class="n">AwsBaseHook</span> |
| <span class="k">except</span> <span class="ne">ImportError</span><span class="p">:</span> |
| <span class="kn">from</span><span class="w"> </span><span class="nn">airflow.exceptions</span><span class="w"> </span><span class="kn">import</span> <span class="n">AirflowOptionalProviderFeatureException</span> |
| |
| <span class="k">raise</span> <span class="n">AirflowOptionalProviderFeatureException</span><span class="p">(</span> |
| <span class="s2">"apache-airflow-providers-amazon not installed, run: "</span> |
| <span class="s2">"pip install 'apache-airflow-providers-postgres[amazon]'."</span> |
| <span class="p">)</span> |
| <span class="n">aws_conn_id</span> <span class="o">=</span> <span class="n">connection</span><span class="o">.</span><span class="n">extra_dejson</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"aws_conn_id"</span><span class="p">,</span> <span class="s2">"aws_default"</span><span class="p">)</span> |
| |
| <span class="n">port</span> <span class="o">=</span> <span class="n">connection</span><span class="o">.</span><span class="n">port</span> <span class="ow">or</span> <span class="mi">5439</span> |
| <span class="n">cluster_identifier</span> <span class="o">=</span> <span class="n">connection</span><span class="o">.</span><span class="n">extra_dejson</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"cluster-identifier"</span><span class="p">,</span> <span class="n">connection</span><span class="o">.</span><span class="n">host</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s2">"."</span><span class="p">)[</span><span class="mi">0</span><span class="p">])</span> |
| <span class="n">region_name</span> <span class="o">=</span> <span class="n">AwsBaseHook</span><span class="p">(</span><span class="n">aws_conn_id</span><span class="o">=</span><span class="n">aws_conn_id</span><span class="p">)</span><span class="o">.</span><span class="n">region_name</span> |
| |
| <span class="k">return</span> <span class="sa">f</span><span class="s2">"</span><span class="si">{</span><span class="n">cluster_identifier</span><span class="si">}</span><span class="s2">.</span><span class="si">{</span><span class="n">region_name</span><span class="si">}</span><span class="s2">:</span><span class="si">{</span><span class="n">port</span><span class="si">}</span><span class="s2">"</span> |
| |
| <div class="viewcode-block" id="PostgresHook.get_openlineage_database_dialect"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.get_openlineage_database_dialect">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">get_openlineage_database_dialect</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span> |
| <span class="w"> </span><span class="sd">"""Return postgres/redshift dialect."""</span> |
| <span class="k">return</span> <span class="s2">"redshift"</span> <span class="k">if</span> <span class="n">connection</span><span class="o">.</span><span class="n">extra_dejson</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"redshift"</span><span class="p">,</span> <span class="kc">False</span><span class="p">)</span> <span class="k">else</span> <span class="s2">"postgres"</span></div> |
| |
| |
| <div class="viewcode-block" id="PostgresHook.get_openlineage_default_schema"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.get_openlineage_default_schema">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">get_openlineage_default_schema</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span> <span class="o">|</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="w"> </span><span class="sd">"""Return current schema. This is usually changed with ``SEARCH_PATH`` parameter."""</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_first</span><span class="p">(</span><span class="s2">"SELECT CURRENT_SCHEMA;"</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span></div> |
| |
| |
| <span class="nd">@classmethod</span> |
| <div class="viewcode-block" id="PostgresHook.get_ui_field_behaviour"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.get_ui_field_behaviour">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">get_ui_field_behaviour</span><span class="p">(</span><span class="bp">cls</span><span class="p">)</span> <span class="o">-></span> <span class="nb">dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">Any</span><span class="p">]:</span> |
| <span class="k">return</span> <span class="p">{</span> |
| <span class="s2">"hidden_fields"</span><span class="p">:</span> <span class="p">[],</span> |
| <span class="s2">"relabeling"</span><span class="p">:</span> <span class="p">{</span> |
| <span class="s2">"schema"</span><span class="p">:</span> <span class="s2">"Database"</span><span class="p">,</span> |
| <span class="p">},</span> |
| <span class="p">}</span></div> |
| |
| |
| <div class="viewcode-block" id="PostgresHook.get_db_log_messages"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.get_db_log_messages">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">get_db_log_messages</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">conn</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> |
| <span class="w"> </span><span class="sd">"""Log database messages."""</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">enable_log_db_messages</span><span class="p">:</span> |
| <span class="k">return</span> |
| |
| <span class="k">if</span> <span class="n">USE_PSYCOPG3</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span> |
| <span class="s2">"With psycopg3, database notices are logged upon creation (via self._notice_handler)."</span> |
| <span class="p">)</span> |
| <span class="k">return</span> |
| |
| <span class="k">for</span> <span class="n">output</span> <span class="ow">in</span> <span class="n">conn</span><span class="o">.</span><span class="n">notices</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="n">output</span><span class="p">)</span></div> |
| |
| |
| <div class="viewcode-block" id="PostgresHook.insert_rows"> |
| <a class="viewcode-back" href="../../../../../_api/airflow/providers/postgres/hooks/postgres/index.html#airflow.providers.postgres.hooks.postgres.PostgresHook.insert_rows">[docs]</a> |
| <span class="k">def</span><span class="w"> </span><span class="nf">insert_rows</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> |
| <span class="n">table</span><span class="p">,</span> |
| <span class="n">rows</span><span class="p">,</span> |
| <span class="n">target_fields</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> |
| <span class="n">commit_every</span><span class="o">=</span><span class="mi">1000</span><span class="p">,</span> |
| <span class="n">replace</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> |
| <span class="o">*</span><span class="p">,</span> |
| <span class="n">executemany</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> |
| <span class="n">fast_executemany</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> |
| <span class="n">autocommit</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> |
| <span class="o">**</span><span class="n">kwargs</span><span class="p">,</span> |
| <span class="p">):</span> |
| <span class="w"> </span><span class="sd">"""</span> |
| <span class="sd"> Insert a collection of tuples into a table.</span> |
| |
| <span class="sd"> Rows are inserted in chunks, each chunk (of size ``commit_every``) is</span> |
| <span class="sd"> done in a new transaction.</span> |
| |
| <span class="sd"> :param table: Name of the target table</span> |
| <span class="sd"> :param rows: The rows to insert into the table</span> |
| <span class="sd"> :param target_fields: The names of the columns to fill in the table</span> |
| <span class="sd"> :param commit_every: The maximum number of rows to insert in one</span> |
| <span class="sd"> transaction. Set to 0 to insert all rows in one transaction.</span> |
| <span class="sd"> :param replace: Whether to replace instead of insert</span> |
| <span class="sd"> :param executemany: If True, all rows are inserted at once in</span> |
| <span class="sd"> chunks defined by the commit_every parameter. This only works if all rows</span> |
| <span class="sd"> have same number of column names, but leads to better performance.</span> |
| <span class="sd"> :param fast_executemany: If True, rows will be inserted using an optimized</span> |
| <span class="sd"> bulk execution strategy (``psycopg2.extras.execute_batch``). This can</span> |
| <span class="sd"> significantly improve performance for large inserts. If set to False,</span> |
| <span class="sd"> the method falls back to the default implementation from</span> |
| <span class="sd"> ``DbApiHook.insert_rows``.</span> |
| <span class="sd"> :param autocommit: What to set the connection's autocommit setting to</span> |
| <span class="sd"> before executing the query.</span> |
| <span class="sd"> """</span> |
| <span class="c1"># if fast_executemany is disabled, defer to default implementation of insert_rows in DbApiHook</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">fast_executemany</span><span class="p">:</span> |
| <span class="k">return</span> <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="n">insert_rows</span><span class="p">(</span> |
| <span class="n">table</span><span class="p">,</span> |
| <span class="n">rows</span><span class="p">,</span> |
| <span class="n">target_fields</span><span class="o">=</span><span class="n">target_fields</span><span class="p">,</span> |
| <span class="n">commit_every</span><span class="o">=</span><span class="n">commit_every</span><span class="p">,</span> |
| <span class="n">replace</span><span class="o">=</span><span class="n">replace</span><span class="p">,</span> |
| <span class="n">executemany</span><span class="o">=</span><span class="n">executemany</span><span class="p">,</span> |
| <span class="n">autocommit</span><span class="o">=</span><span class="n">autocommit</span><span class="p">,</span> |
| <span class="o">**</span><span class="n">kwargs</span><span class="p">,</span> |
| <span class="p">)</span> |
| |
| <span class="c1"># if fast_executemany is enabled, use optimized execute_batch from psycopg</span> |
| <span class="n">nb_rows</span> <span class="o">=</span> <span class="mi">0</span> |
| <span class="k">with</span> <span class="bp">self</span><span class="o">.</span><span class="n">_create_autocommit_connection</span><span class="p">(</span><span class="n">autocommit</span><span class="p">)</span> <span class="k">as</span> <span class="n">conn</span><span class="p">:</span> |
| <span class="n">conn</span><span class="o">.</span><span class="n">commit</span><span class="p">()</span> |
| <span class="k">with</span> <span class="n">closing</span><span class="p">(</span><span class="n">conn</span><span class="o">.</span><span class="n">cursor</span><span class="p">())</span> <span class="k">as</span> <span class="n">cur</span><span class="p">:</span> |
| <span class="k">for</span> <span class="n">chunked_rows</span> <span class="ow">in</span> <span class="n">chunked</span><span class="p">(</span><span class="n">rows</span><span class="p">,</span> <span class="n">commit_every</span><span class="p">):</span> |
| <span class="n">values</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span> |
| <span class="nb">map</span><span class="p">(</span> |
| <span class="k">lambda</span> <span class="n">row</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">_serialize_cells</span><span class="p">(</span><span class="n">row</span><span class="p">,</span> <span class="n">conn</span><span class="p">),</span> |
| <span class="n">chunked_rows</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="p">)</span> |
| <span class="n">sql</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_generate_insert_sql</span><span class="p">(</span><span class="n">table</span><span class="p">,</span> <span class="n">values</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">target_fields</span><span class="p">,</span> <span class="n">replace</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s2">"Generated sql: </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">sql</span><span class="p">)</span> |
| |
| <span class="k">try</span><span class="p">:</span> |
| <span class="n">execute_batch</span><span class="p">(</span><span class="n">cur</span><span class="p">,</span> <span class="n">sql</span><span class="p">,</span> <span class="n">values</span><span class="p">,</span> <span class="n">page_size</span><span class="o">=</span><span class="n">commit_every</span><span class="p">)</span> |
| <span class="k">except</span> <span class="ne">Exception</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="s2">"Generated sql: </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">sql</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="s2">"Parameters: </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">values</span><span class="p">)</span> |
| <span class="k">raise</span> <span class="n">e</span> |
| |
| <span class="n">conn</span><span class="o">.</span><span class="n">commit</span><span class="p">()</span> |
| <span class="n">nb_rows</span> <span class="o">+=</span> <span class="nb">len</span><span class="p">(</span><span class="n">chunked_rows</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s2">"Loaded </span><span class="si">%s</span><span class="s2"> rows into </span><span class="si">%s</span><span class="s2"> so far"</span><span class="p">,</span> <span class="n">nb_rows</span><span class="p">,</span> <span class="n">table</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s2">"Done loading. Loaded a total of </span><span class="si">%s</span><span class="s2"> rows into </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">nb_rows</span><span class="p">,</span> <span class="n">table</span><span class="p">)</span></div> |
| </div> |
| |
| </pre></div> |
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