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<h1>Source code for airflow.contrib.hooks.snowflake_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"># &quot;License&quot;); 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"># &quot;AS IS&quot; 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">import</span> <span class="nn">snowflake.connector</span>
<span class="kn">from</span> <span class="nn">airflow.hooks.dbapi_hook</span> <span class="k">import</span> <span class="n">DbApiHook</span>
<div class="viewcode-block" id="SnowflakeHook"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/snowflake_hook/index.html#airflow.contrib.hooks.snowflake_hook.SnowflakeHook">[docs]</a><span class="k">class</span> <span class="nc">SnowflakeHook</span><span class="p">(</span><span class="n">DbApiHook</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Interact with Snowflake.</span>
<span class="sd"> get_sqlalchemy_engine() depends on snowflake-sqlalchemy</span>
<span class="sd"> &quot;&quot;&quot;</span>
<div class="viewcode-block" id="SnowflakeHook.conn_name_attr"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/snowflake_hook/index.html#airflow.contrib.hooks.snowflake_hook.SnowflakeHook.conn_name_attr">[docs]</a> <span class="n">conn_name_attr</span> <span class="o">=</span> <span class="s1">&#39;snowflake_conn_id&#39;</span></div>
<div class="viewcode-block" id="SnowflakeHook.default_conn_name"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/snowflake_hook/index.html#airflow.contrib.hooks.snowflake_hook.SnowflakeHook.default_conn_name">[docs]</a> <span class="n">default_conn_name</span> <span class="o">=</span> <span class="s1">&#39;snowflake_default&#39;</span></div>
<div class="viewcode-block" id="SnowflakeHook.supports_autocommit"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/snowflake_hook/index.html#airflow.contrib.hooks.snowflake_hook.SnowflakeHook.supports_autocommit">[docs]</a> <span class="n">supports_autocommit</span> <span class="o">=</span> <span class="kc">True</span></div>
<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="nb">super</span><span class="p">(</span><span class="n">SnowflakeHook</span><span class="p">,</span> <span class="bp">self</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>
<span class="bp">self</span><span class="o">.</span><span class="n">account</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">&quot;account&quot;</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">warehouse</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">&quot;warehouse&quot;</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">database</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">&quot;database&quot;</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<div class="viewcode-block" id="SnowflakeHook._get_conn_params"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/snowflake_hook/index.html#airflow.contrib.hooks.snowflake_hook.SnowflakeHook._get_conn_params">[docs]</a> <span class="k">def</span> <span class="nf">_get_conn_params</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> one method to fetch connection params as a dict</span>
<span class="sd"> used in get_uri() and get_connection()</span>
<span class="sd"> &quot;&quot;&quot;</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="bp">self</span><span class="o">.</span><span class="n">snowflake_conn_id</span><span class="p">)</span>
<span class="n">account</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="s1">&#39;account&#39;</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="n">warehouse</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="s1">&#39;warehouse&#39;</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="n">database</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="s1">&#39;database&#39;</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="n">conn_config</span> <span class="o">=</span> <span class="p">{</span>
<span class="s2">&quot;user&quot;</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">&quot;password&quot;</span><span class="p">:</span> <span class="n">conn</span><span class="o">.</span><span class="n">password</span> <span class="ow">or</span> <span class="s1">&#39;&#39;</span><span class="p">,</span>
<span class="s2">&quot;schema&quot;</span><span class="p">:</span> <span class="n">conn</span><span class="o">.</span><span class="n">schema</span> <span class="ow">or</span> <span class="s1">&#39;&#39;</span><span class="p">,</span>
<span class="s2">&quot;database&quot;</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">database</span> <span class="ow">or</span> <span class="s1">&#39;&#39;</span><span class="p">,</span>
<span class="s2">&quot;account&quot;</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">account</span> <span class="ow">or</span> <span class="n">account</span> <span class="ow">or</span> <span class="s1">&#39;&#39;</span><span class="p">,</span>
<span class="s2">&quot;warehouse&quot;</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">warehouse</span> <span class="ow">or</span> <span class="n">warehouse</span> <span class="ow">or</span> <span class="s1">&#39;&#39;</span>
<span class="p">}</span>
<span class="k">return</span> <span class="n">conn_config</span></div>
<div class="viewcode-block" id="SnowflakeHook.get_uri"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/snowflake_hook/index.html#airflow.contrib.hooks.snowflake_hook.SnowflakeHook.get_uri">[docs]</a> <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="sd">&quot;&quot;&quot;</span>
<span class="sd"> override DbApiHook get_uri method for get_sqlalchemy_engine()</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">conn_config</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_conn_params</span><span class="p">()</span>
<span class="n">uri</span> <span class="o">=</span> <span class="s1">&#39;snowflake://</span><span class="si">{user}</span><span class="s1">:</span><span class="si">{password}</span><span class="s1">@</span><span class="si">{account}</span><span class="s1">/</span><span class="si">{database}</span><span class="s1">/&#39;</span>
<span class="n">uri</span> <span class="o">+=</span> <span class="s1">&#39;</span><span class="si">{schema}</span><span class="s1">?warehouse=</span><span class="si">{warehouse}</span><span class="s1">&#39;</span>
<span class="k">return</span> <span class="n">uri</span><span class="o">.</span><span class="n">format</span><span class="p">(</span>
<span class="o">**</span><span class="n">conn_config</span><span class="p">)</span></div>
<div class="viewcode-block" id="SnowflakeHook.get_conn"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/snowflake_hook/index.html#airflow.contrib.hooks.snowflake_hook.SnowflakeHook.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">&quot;&quot;&quot;</span>
<span class="sd"> Returns a snowflake.connection object</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">conn_config</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_conn_params</span><span class="p">()</span>
<span class="n">conn</span> <span class="o">=</span> <span class="n">snowflake</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="o">**</span><span class="n">conn_config</span><span class="p">)</span>
<span class="k">return</span> <span class="n">conn</span></div>
<div class="viewcode-block" id="SnowflakeHook._get_aws_credentials"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/snowflake_hook/index.html#airflow.contrib.hooks.snowflake_hook.SnowflakeHook._get_aws_credentials">[docs]</a> <span class="k">def</span> <span class="nf">_get_aws_credentials</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> returns aws_access_key_id, aws_secret_access_key</span>
<span class="sd"> from extra</span>
<span class="sd"> intended to be used by external import and export statements</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">snowflake_conn_id</span><span class="p">:</span>
<span class="n">connection_object</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="bp">self</span><span class="o">.</span><span class="n">snowflake_conn_id</span><span class="p">)</span>
<span class="k">if</span> <span class="s1">&#39;aws_secret_access_key&#39;</span> <span class="ow">in</span> <span class="n">connection_object</span><span class="o">.</span><span class="n">extra_dejson</span><span class="p">:</span>
<span class="n">aws_access_key_id</span> <span class="o">=</span> <span class="n">connection_object</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="s1">&#39;aws_access_key_id&#39;</span><span class="p">)</span>
<span class="n">aws_secret_access_key</span> <span class="o">=</span> <span class="n">connection_object</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="s1">&#39;aws_secret_access_key&#39;</span><span class="p">)</span>
<span class="k">return</span> <span class="n">aws_access_key_id</span><span class="p">,</span> <span class="n">aws_secret_access_key</span></div>
<div class="viewcode-block" id="SnowflakeHook.set_autocommit"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/snowflake_hook/index.html#airflow.contrib.hooks.snowflake_hook.SnowflakeHook.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="n">conn</span><span class="o">.</span><span class="n">autocommit</span><span class="p">(</span><span class="n">autocommit</span><span class="p">)</span></div></div>
</pre></div>
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