| |
| |
| <!DOCTYPE html> |
| <!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]--> |
| <!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]--> |
| <head> |
| <meta charset="utf-8"> |
| |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> |
| |
| <title>airflow.hooks.dbapi_hook — Airflow Documentation</title> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <link rel="stylesheet" href="../../../_static/css/theme.css" type="text/css" /> |
| <link rel="stylesheet" href="../../../_static/pygments.css" type="text/css" /> |
| <link rel="index" title="Index" href="../../../genindex.html" /> |
| <link rel="search" title="Search" href="../../../search.html" /> |
| |
| |
| <script src="../../../_static/js/modernizr.min.js"></script> |
| <!-- Matomo --> |
| <script> |
| var _paq = window._paq = window._paq || []; |
| _paq.push(['disableCookies']); |
| _paq.push(['trackPageView']); |
| _paq.push(['enableLinkTracking']); |
| (function() { |
| var u="https://analytics.apache.org/"; |
| _paq.push(['setTrackerUrl', u+'matomo.php']); |
| _paq.push(['setSiteId', '13']); |
| var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0]; |
| g.async=true; g.src=u+'matomo.js'; s.parentNode.insertBefore(g,s); |
| })(); |
| </script> |
| <!-- End Matomo --> |
| </head> |
| |
| |
| <body class="wy-body-for-nav"> |
| |
| |
| <div class="wy-grid-for-nav"> |
| |
| |
| <nav data-toggle="wy-nav-shift" class="wy-nav-side"> |
| <div class="wy-side-scroll"> |
| <div class="wy-side-nav-search"> |
| |
| |
| |
| <a href="../../../index.html" class="icon icon-home"> Airflow |
| |
| |
| |
| </a> |
| |
| |
| |
| |
| |
| |
| |
| <div role="search"> |
| <form id="rtd-search-form" class="wy-form" action="../../../search.html" method="get"> |
| <input type="text" name="q" placeholder="Search docs" /> |
| <input type="hidden" name="check_keywords" value="yes" /> |
| <input type="hidden" name="area" value="default" /> |
| </form> |
| </div> |
| |
| |
| </div> |
| |
| <div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="main navigation"> |
| |
| |
| |
| |
| |
| |
| <ul> |
| <li class="toctree-l1"><a class="reference internal" href="../../../project.html">Project</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../license.html">License</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../start.html">Quick Start</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../installation.html">Installation</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../tutorial.html">Tutorial</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../howto/index.html">How-to Guides</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../ui.html">UI / Screenshots</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../concepts.html">Concepts</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../profiling.html">Data Profiling</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../cli.html">Command Line Interface</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../scheduler.html">Scheduling & Triggers</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../plugins.html">Plugins</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../security.html">Security</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../timezone.html">Time zones</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../api.html">Experimental Rest API</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../integration.html">Integration</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../lineage.html">Lineage</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../faq.html">FAQ</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../code.html">API Reference</a></li> |
| </ul> |
| |
| |
| |
| </div> |
| </div> |
| </nav> |
| |
| <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap"> |
| |
| |
| <nav class="wy-nav-top" aria-label="top navigation"> |
| |
| <i data-toggle="wy-nav-top" class="fa fa-bars"></i> |
| <a href="../../../index.html">Airflow</a> |
| |
| </nav> |
| |
| |
| <div class="wy-nav-content"> |
| |
| <div class="rst-content"> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <div role="navigation" aria-label="breadcrumbs navigation"> |
| |
| <ul class="wy-breadcrumbs"> |
| |
| <li><a href="../../../index.html">Docs</a> »</li> |
| |
| <li><a href="../../index.html">Module code</a> »</li> |
| |
| <li>airflow.hooks.dbapi_hook</li> |
| |
| |
| <li class="wy-breadcrumbs-aside"> |
| |
| </li> |
| |
| </ul> |
| |
| |
| <hr/> |
| </div> |
| <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article"> |
| <div itemprop="articleBody"> |
| |
| <h1>Source code for airflow.hooks.dbapi_hook</h1><div class="highlight"><pre> |
| <span></span><span class="c1"># -*- coding: utf-8 -*-</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="nn">builtins</span> <span class="k">import</span> <span class="nb">str</span> |
| <span class="kn">from</span> <span class="nn">past.builtins</span> <span class="k">import</span> <span class="n">basestring</span> |
| <span class="kn">from</span> <span class="nn">datetime</span> <span class="k">import</span> <span class="n">datetime</span> |
| <span class="kn">from</span> <span class="nn">contextlib</span> <span class="k">import</span> <span class="n">closing</span> |
| <span class="kn">import</span> <span class="nn">sys</span> |
| |
| <span class="kn">from</span> <span class="nn">sqlalchemy</span> <span class="k">import</span> <span class="n">create_engine</span> |
| |
| <span class="kn">from</span> <span class="nn">airflow.hooks.base_hook</span> <span class="k">import</span> <span class="n">BaseHook</span> |
| <span class="kn">from</span> <span class="nn">airflow.exceptions</span> <span class="k">import</span> <span class="n">AirflowException</span> |
| |
| |
| <div class="viewcode-block" id="DbApiHook"><a class="viewcode-back" href="../../../code.html#airflow.hooks.dbapi_hook.DbApiHook">[docs]</a><span class="k">class</span> <span class="nc">DbApiHook</span><span class="p">(</span><span class="n">BaseHook</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Abstract base class for sql hooks.</span> |
| <span class="sd"> """</span> |
| <span class="c1"># Override to provide the connection name.</span> |
| <span class="n">conn_name_attr</span> <span class="o">=</span> <span class="kc">None</span> |
| <span class="c1"># Override to have a default connection id for a particular dbHook</span> |
| <span class="n">default_conn_name</span> <span class="o">=</span> <span class="s1">'default_conn_id'</span> |
| <span class="c1"># Override if this db supports autocommit.</span> |
| <span class="n">supports_autocommit</span> <span class="o">=</span> <span class="kc">False</span> |
| <span class="c1"># Override with the object that exposes the connect method</span> |
| <span class="n">connector</span> <span class="o">=</span> <span class="kc">None</span> |
| |
| <span class="k">def</span> <span class="nf">__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="o">**</span><span class="n">kwargs</span><span class="p">):</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">conn_name_attr</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span><span class="s2">"conn_name_attr is not defined"</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="nb">len</span><span class="p">(</span><span class="n">args</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> |
| <span class="nb">setattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">conn_name_attr</span><span class="p">,</span> <span class="n">args</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span> |
| <span class="k">elif</span> <span class="bp">self</span><span class="o">.</span><span class="n">conn_name_attr</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">kwargs</span><span class="p">:</span> |
| <span class="nb">setattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">conn_name_attr</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">default_conn_name</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="nb">setattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">conn_name_attr</span><span class="p">,</span> <span class="n">kwargs</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">conn_name_attr</span><span class="p">])</span> |
| |
| <div class="viewcode-block" id="DbApiHook.get_conn"><a class="viewcode-back" href="../../../code.html#airflow.hooks.dbapi_hook.DbApiHook.get_conn">[docs]</a> <span class="k">def</span> <span class="nf">get_conn</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""Returns a connection object</span> |
| <span class="sd"> """</span> |
| <span class="n">db</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_connection</span><span class="p">(</span><span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">conn_name_attr</span><span class="p">))</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">connector</span><span class="o">.</span><span class="n">connect</span><span class="p">(</span> |
| <span class="n">host</span><span class="o">=</span><span class="n">db</span><span class="o">.</span><span class="n">host</span><span class="p">,</span> |
| <span class="n">port</span><span class="o">=</span><span class="n">db</span><span class="o">.</span><span class="n">port</span><span class="p">,</span> |
| <span class="n">username</span><span class="o">=</span><span class="n">db</span><span class="o">.</span><span class="n">login</span><span class="p">,</span> |
| <span class="n">schema</span><span class="o">=</span><span class="n">db</span><span class="o">.</span><span class="n">schema</span><span class="p">)</span></div> |
| |
| <span class="k">def</span> <span class="nf">get_uri</span><span class="p">(</span><span class="bp">self</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">get_connection</span><span class="p">(</span><span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">conn_name_attr</span><span class="p">))</span> |
| <span class="n">login</span> <span class="o">=</span> <span class="s1">''</span> |
| <span class="k">if</span> <span class="n">conn</span><span class="o">.</span><span class="n">login</span><span class="p">:</span> |
| <span class="n">login</span> <span class="o">=</span> <span class="s1">'</span><span class="si">{conn.login}</span><span class="s1">:</span><span class="si">{conn.password}</span><span class="s1">@'</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">conn</span><span class="o">=</span><span class="n">conn</span><span class="p">)</span> |
| <span class="n">host</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">host</span> |
| <span class="k">if</span> <span class="n">conn</span><span class="o">.</span><span class="n">port</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">host</span> <span class="o">+=</span> <span class="s1">':</span><span class="si">{port}</span><span class="s1">'</span><span class="o">.</span><span class="n">format</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="p">)</span> |
| <span class="k">return</span> <span class="s1">'</span><span class="si">{conn.conn_type}</span><span class="s1">://</span><span class="si">{login}{host}</span><span class="s1">/</span><span class="si">{conn.schema}</span><span class="s1">'</span><span class="o">.</span><span class="n">format</span><span class="p">(</span> |
| <span class="n">conn</span><span class="o">=</span><span class="n">conn</span><span class="p">,</span> <span class="n">login</span><span class="o">=</span><span class="n">login</span><span class="p">,</span> <span class="n">host</span><span class="o">=</span><span class="n">host</span><span class="p">)</span> |
| |
| <span class="k">def</span> <span class="nf">get_sqlalchemy_engine</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">engine_kwargs</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> |
| <span class="k">if</span> <span class="n">engine_kwargs</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">engine_kwargs</span> <span class="o">=</span> <span class="p">{}</span> |
| <span class="k">return</span> <span class="n">create_engine</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">get_uri</span><span class="p">(),</span> <span class="o">**</span><span class="n">engine_kwargs</span><span class="p">)</span> |
| |
| <div class="viewcode-block" id="DbApiHook.get_pandas_df"><a class="viewcode-back" href="../../../code.html#airflow.hooks.dbapi_hook.DbApiHook.get_pandas_df">[docs]</a> <span class="k">def</span> <span class="nf">get_pandas_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="n">parameters</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Executes the sql and returns a pandas dataframe</span> |
| |
| <span class="sd"> :param sql: the sql statement to be executed (str) or a list of</span> |
| <span class="sd"> sql statements to execute</span> |
| <span class="sd"> :type sql: str or list</span> |
| <span class="sd"> :param parameters: The parameters to render the SQL query with.</span> |
| <span class="sd"> :type parameters: mapping or iterable</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="n">sys</span><span class="o">.</span><span class="n">version_info</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o"><</span> <span class="mi">3</span><span class="p">:</span> |
| <span class="n">sql</span> <span class="o">=</span> <span class="n">sql</span><span class="o">.</span><span class="n">encode</span><span class="p">(</span><span class="s1">'utf-8'</span><span class="p">)</span> |
| <span class="kn">import</span> <span class="nn">pandas.io.sql</span> <span class="k">as</span> <span class="nn">psql</span> |
| |
| <span class="k">with</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="k">return</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></div> |
| |
| <div class="viewcode-block" id="DbApiHook.get_records"><a class="viewcode-back" href="../../../code.html#airflow.hooks.dbapi_hook.DbApiHook.get_records">[docs]</a> <span class="k">def</span> <span class="nf">get_records</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="n">parameters</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Executes the sql and returns a set of records.</span> |
| |
| <span class="sd"> :param sql: the sql statement to be executed (str) or a list of</span> |
| <span class="sd"> sql statements to execute</span> |
| <span class="sd"> :type sql: str or list</span> |
| <span class="sd"> :param parameters: The parameters to render the SQL query with.</span> |
| <span class="sd"> :type parameters: mapping or iterable</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="n">sys</span><span class="o">.</span><span class="n">version_info</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o"><</span> <span class="mi">3</span><span class="p">:</span> |
| <span class="n">sql</span> <span class="o">=</span> <span class="n">sql</span><span class="o">.</span><span class="n">encode</span><span class="p">(</span><span class="s1">'utf-8'</span><span class="p">)</span> |
| |
| <span class="k">with</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="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">if</span> <span class="n">parameters</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">cur</span><span class="o">.</span><span class="n">execute</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="k">else</span><span class="p">:</span> |
| <span class="n">cur</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="n">sql</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">cur</span><span class="o">.</span><span class="n">fetchall</span><span class="p">()</span></div> |
| |
| <div class="viewcode-block" id="DbApiHook.get_first"><a class="viewcode-back" href="../../../code.html#airflow.hooks.dbapi_hook.DbApiHook.get_first">[docs]</a> <span class="k">def</span> <span class="nf">get_first</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="n">parameters</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Executes the sql and returns the first resulting row.</span> |
| |
| <span class="sd"> :param sql: the sql statement to be executed (str) or a list of</span> |
| <span class="sd"> sql statements to execute</span> |
| <span class="sd"> :type sql: str or list</span> |
| <span class="sd"> :param parameters: The parameters to render the SQL query with.</span> |
| <span class="sd"> :type parameters: mapping or iterable</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="n">sys</span><span class="o">.</span><span class="n">version_info</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o"><</span> <span class="mi">3</span><span class="p">:</span> |
| <span class="n">sql</span> <span class="o">=</span> <span class="n">sql</span><span class="o">.</span><span class="n">encode</span><span class="p">(</span><span class="s1">'utf-8'</span><span class="p">)</span> |
| |
| <span class="k">with</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="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">if</span> <span class="n">parameters</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">cur</span><span class="o">.</span><span class="n">execute</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="k">else</span><span class="p">:</span> |
| <span class="n">cur</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="n">sql</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">cur</span><span class="o">.</span><span class="n">fetchone</span><span class="p">()</span></div> |
| |
| <div class="viewcode-block" id="DbApiHook.run"><a class="viewcode-back" href="../../../code.html#airflow.hooks.dbapi_hook.DbApiHook.run">[docs]</a> <span class="k">def</span> <span class="nf">run</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="n">autocommit</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">parameters</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Runs a command or a list of commands. Pass a list of sql</span> |
| <span class="sd"> statements to the sql parameter to get them to execute</span> |
| <span class="sd"> sequentially</span> |
| |
| <span class="sd"> :param sql: the sql statement to be executed (str) or a list of</span> |
| <span class="sd"> sql statements to execute</span> |
| <span class="sd"> :type sql: str or list</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"> :type autocommit: bool</span> |
| <span class="sd"> :param parameters: The parameters to render the SQL query with.</span> |
| <span class="sd"> :type parameters: mapping or iterable</span> |
| <span class="sd"> """</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="n">basestring</span><span class="p">):</span> |
| <span class="n">sql</span> <span class="o">=</span> <span class="p">[</span><span class="n">sql</span><span class="p">]</span> |
| |
| <span class="k">with</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="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">supports_autocommit</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">set_autocommit</span><span class="p">(</span><span class="n">conn</span><span class="p">,</span> <span class="n">autocommit</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">s</span> <span class="ow">in</span> <span class="n">sql</span><span class="p">:</span> |
| <span class="k">if</span> <span class="n">sys</span><span class="o">.</span><span class="n">version_info</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o"><</span> <span class="mi">3</span><span class="p">:</span> |
| <span class="n">s</span> <span class="o">=</span> <span class="n">s</span><span class="o">.</span><span class="n">encode</span><span class="p">(</span><span class="s1">'utf-8'</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">s</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">parameters</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">cur</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="n">parameters</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">cur</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="n">s</span><span class="p">)</span> |
| |
| <span class="c1"># If autocommit was set to False for db that supports autocommit,</span> |
| <span class="c1"># or if db does not supports autocommit, we do a manual commit.</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_autocommit</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">commit</span><span class="p">()</span></div> |
| |
| <div class="viewcode-block" id="DbApiHook.set_autocommit"><a class="viewcode-back" href="../../../code.html#airflow.hooks.dbapi_hook.DbApiHook.set_autocommit">[docs]</a> <span class="k">def</span> <span class="nf">set_autocommit</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">autocommit</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Sets the autocommit flag on the connection</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">supports_autocommit</span> <span class="ow">and</span> <span class="n">autocommit</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">warn</span><span class="p">(</span> |
| <span class="p">(</span><span class="s2">"</span><span class="si">%s</span><span class="s2"> connection doesn't support "</span> |
| <span class="s2">"autocommit but autocommit activated."</span><span class="p">),</span> |
| <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">conn_name_attr</span><span class="p">))</span> |
| <span class="n">conn</span><span class="o">.</span><span class="n">autocommit</span> <span class="o">=</span> <span class="n">autocommit</span></div> |
| |
| <div class="viewcode-block" id="DbApiHook.get_autocommit"><a class="viewcode-back" href="../../../code.html#airflow.hooks.dbapi_hook.DbApiHook.get_autocommit">[docs]</a> <span class="k">def</span> <span class="nf">get_autocommit</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="sd">"""</span> |
| <span class="sd"> Get autocommit setting for the provided connection.</span> |
| <span class="sd"> Return True if conn.autocommit is set to True.</span> |
| <span class="sd"> Return False if conn.autocommit is not set or set to False or conn</span> |
| <span class="sd"> does not support autocommit.</span> |
| <span class="sd"> :param conn: Connection to get autocommit setting from.</span> |
| <span class="sd"> :type conn: connection object.</span> |
| <span class="sd"> :return: connection autocommit setting.</span> |
| <span class="sd"> :rtype bool.</span> |
| <span class="sd"> """</span> |
| |
| <span class="k">return</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">conn</span><span class="p">,</span> <span class="s1">'autocommit'</span><span class="p">,</span> <span class="kc">False</span><span class="p">)</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">supports_autocommit</span></div> |
| |
| <div class="viewcode-block" id="DbApiHook.get_cursor"><a class="viewcode-back" href="../../../code.html#airflow.hooks.dbapi_hook.DbApiHook.get_cursor">[docs]</a> <span class="k">def</span> <span class="nf">get_cursor</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Returns a cursor</span> |
| <span class="sd"> """</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_conn</span><span class="p">()</span><span class="o">.</span><span class="n">cursor</span><span class="p">()</span></div> |
| |
| <div class="viewcode-block" id="DbApiHook.insert_rows"><a class="viewcode-back" href="../../../code.html#airflow.hooks.dbapi_hook.DbApiHook.insert_rows">[docs]</a> <span class="k">def</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="sd">"""</span> |
| <span class="sd"> A generic way to insert a set of tuples into a table,</span> |
| <span class="sd"> a new transaction is created every commit_every rows</span> |
| |
| <span class="sd"> :param table: Name of the target table</span> |
| <span class="sd"> :type table: str</span> |
| <span class="sd"> :param rows: The rows to insert into the table</span> |
| <span class="sd"> :type rows: iterable of tuples</span> |
| <span class="sd"> :param target_fields: The names of the columns to fill in the table</span> |
| <span class="sd"> :type target_fields: iterable of strings</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"> :type commit_every: int</span> |
| <span class="sd"> :param replace: Whether to replace instead of insert</span> |
| <span class="sd"> :type replace: bool</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="n">target_fields</span><span class="p">:</span> |
| <span class="n">target_fields</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">target_fields</span><span class="p">)</span> |
| <span class="n">target_fields</span> <span class="o">=</span> <span class="s2">"(</span><span class="si">{}</span><span class="s2">)"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">target_fields</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">target_fields</span> <span class="o">=</span> <span class="s1">''</span> |
| <span class="n">i</span> <span class="o">=</span> <span class="mi">0</span> |
| <span class="k">with</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="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">supports_autocommit</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">set_autocommit</span><span class="p">(</span><span class="n">conn</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">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">i</span><span class="p">,</span> <span class="n">row</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">rows</span><span class="p">,</span> <span class="mi">1</span><span class="p">):</span> |
| <span class="n">lst</span> <span class="o">=</span> <span class="p">[]</span> |
| <span class="k">for</span> <span class="n">cell</span> <span class="ow">in</span> <span class="n">row</span><span class="p">:</span> |
| <span class="n">lst</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_serialize_cell</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="n">values</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span><span class="n">lst</span><span class="p">)</span> |
| <span class="n">placeholders</span> <span class="o">=</span> <span class="p">[</span><span class="s2">"</span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="p">]</span> <span class="o">*</span> <span class="nb">len</span><span class="p">(</span><span class="n">values</span><span class="p">)</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">replace</span><span class="p">:</span> |
| <span class="n">sql</span> <span class="o">=</span> <span class="s2">"INSERT INTO "</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">sql</span> <span class="o">=</span> <span class="s2">"REPLACE INTO "</span> |
| <span class="n">sql</span> <span class="o">+=</span> <span class="s2">"</span><span class="si">{0}</span><span class="s2"> </span><span class="si">{1}</span><span class="s2"> VALUES (</span><span class="si">{2}</span><span class="s2">)"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span> |
| <span class="n">table</span><span class="p">,</span> |
| <span class="n">target_fields</span><span class="p">,</span> |
| <span class="s2">","</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">placeholders</span><span class="p">))</span> |
| <span class="n">cur</span><span class="o">.</span><span class="n">execute</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="k">if</span> <span class="n">commit_every</span> <span class="ow">and</span> <span class="n">i</span> <span class="o">%</span> <span class="n">commit_every</span> <span class="o">==</span> <span class="mi">0</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="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">{i}</span><span class="s2"> into </span><span class="si">{table}</span><span class="s2"> rows so far"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="o">**</span><span class="nb">locals</span><span class="p">())</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="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">{i}</span><span class="s2"> rows"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="o">**</span><span class="nb">locals</span><span class="p">()))</span></div> |
| |
| <span class="nd">@staticmethod</span> |
| <span class="k">def</span> <span class="nf">_serialize_cell</span><span class="p">(</span><span class="n">cell</span><span class="p">,</span> <span class="n">conn</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Returns the SQL literal of the cell as a string.</span> |
| |
| <span class="sd"> :param cell: The cell to insert into the table</span> |
| <span class="sd"> :type cell: object</span> |
| <span class="sd"> :param conn: The database connection</span> |
| <span class="sd"> :type conn: connection object</span> |
| <span class="sd"> :return: The serialized cell</span> |
| <span class="sd"> :rtype: str</span> |
| <span class="sd"> """</span> |
| |
| <span class="k">if</span> <span class="n">cell</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="k">return</span> <span class="kc">None</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="n">datetime</span><span class="p">):</span> |
| <span class="k">return</span> <span class="n">cell</span><span class="o">.</span><span class="n">isoformat</span><span class="p">()</span> |
| <span class="k">return</span> <span class="nb">str</span><span class="p">(</span><span class="n">cell</span><span class="p">)</span> |
| |
| <div class="viewcode-block" id="DbApiHook.bulk_dump"><a class="viewcode-back" href="../../../code.html#airflow.hooks.dbapi_hook.DbApiHook.bulk_dump">[docs]</a> <span class="k">def</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="n">tmp_file</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Dumps a database table into a tab-delimited file</span> |
| |
| <span class="sd"> :param table: The name of the source table</span> |
| <span class="sd"> :type table: str</span> |
| <span class="sd"> :param tmp_file: The path of the target file</span> |
| <span class="sd"> :type tmp_file: str</span> |
| <span class="sd"> """</span> |
| <span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">()</span></div> |
| |
| <div class="viewcode-block" id="DbApiHook.bulk_load"><a class="viewcode-back" href="../../../code.html#airflow.hooks.dbapi_hook.DbApiHook.bulk_load">[docs]</a> <span class="k">def</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="n">tmp_file</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Loads a tab-delimited file into a database table</span> |
| |
| <span class="sd"> :param table: The name of the target table</span> |
| <span class="sd"> :type table: str</span> |
| <span class="sd"> :param tmp_file: The path of the file to load into the table</span> |
| <span class="sd"> :type tmp_file: str</span> |
| <span class="sd"> """</span> |
| <span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">()</span></div></div> |
| </pre></div> |
| |
| </div> |
| |
| </div> |
| <footer> |
| |
| |
| <hr/> |
| |
| <div role="contentinfo"> |
| <p> |
| |
| </p> |
| </div> |
| Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/rtfd/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>. |
| |
| </footer> |
| |
| </div> |
| </div> |
| |
| </section> |
| |
| </div> |
| |
| |
| |
| |
| |
| |
| |
| <script type="text/javascript" id="documentation_options" data-url_root="../../../" src="../../../_static/documentation_options.js"></script> |
| <script type="text/javascript" src="../../../_static/jquery.js"></script> |
| <script type="text/javascript" src="../../../_static/underscore.js"></script> |
| <script type="text/javascript" src="../../../_static/doctools.js"></script> |
| |
| |
| |
| |
| <script type="text/javascript" src="../../../_static/js/theme.js"></script> |
| |
| <script type="text/javascript"> |
| jQuery(function () { |
| SphinxRtdTheme.Navigation.enable(true); |
| }); |
| </script> |
| |
| </body> |
| </html> |