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<h1>Source code for airflow.operators.mysql_to_hive</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">from</span> <span class="nn">builtins</span> <span class="k">import</span> <span class="nb">chr</span>
<span class="kn">from</span> <span class="nn">collections</span> <span class="k">import</span> <span class="n">OrderedDict</span>
<span class="kn">import</span> <span class="nn">unicodecsv</span> <span class="k">as</span> <span class="nn">csv</span>
<span class="kn">from</span> <span class="nn">tempfile</span> <span class="k">import</span> <span class="n">NamedTemporaryFile</span>
<span class="kn">import</span> <span class="nn">MySQLdb</span>
<span class="kn">from</span> <span class="nn">airflow.hooks.hive_hooks</span> <span class="k">import</span> <span class="n">HiveCliHook</span>
<span class="kn">from</span> <span class="nn">airflow.hooks.mysql_hook</span> <span class="k">import</span> <span class="n">MySqlHook</span>
<span class="kn">from</span> <span class="nn">airflow.models</span> <span class="k">import</span> <span class="n">BaseOperator</span>
<span class="kn">from</span> <span class="nn">airflow.utils.decorators</span> <span class="k">import</span> <span class="n">apply_defaults</span>
<div class="viewcode-block" id="MySqlToHiveTransfer"><a class="viewcode-back" href="../../../_api/airflow/operators/mysql_to_hive/index.html#airflow.operators.mysql_to_hive.MySqlToHiveTransfer">[docs]</a><span class="k">class</span> <span class="nc">MySqlToHiveTransfer</span><span class="p">(</span><span class="n">BaseOperator</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Moves data from MySql to Hive. The operator runs your query against</span>
<span class="sd"> MySQL, stores the file locally before loading it into a Hive table.</span>
<span class="sd"> If the ``create`` or ``recreate`` arguments are set to ``True``,</span>
<span class="sd"> a ``CREATE TABLE`` and ``DROP TABLE`` statements are generated.</span>
<span class="sd"> Hive data types are inferred from the cursor&#39;s metadata. Note that the</span>
<span class="sd"> table generated in Hive uses ``STORED AS textfile``</span>
<span class="sd"> which isn&#39;t the most efficient serialization format. If a</span>
<span class="sd"> large amount of data is loaded and/or if the table gets</span>
<span class="sd"> queried considerably, you may want to use this operator only to</span>
<span class="sd"> stage the data into a temporary table before loading it into its</span>
<span class="sd"> final destination using a ``HiveOperator``.</span>
<span class="sd"> :param sql: SQL query to execute against the MySQL database. (templated)</span>
<span class="sd"> :type sql: str</span>
<span class="sd"> :param hive_table: target Hive table, use dot notation to target a</span>
<span class="sd"> specific database. (templated)</span>
<span class="sd"> :type hive_table: str</span>
<span class="sd"> :param create: whether to create the table if it doesn&#39;t exist</span>
<span class="sd"> :type create: bool</span>
<span class="sd"> :param recreate: whether to drop and recreate the table at every</span>
<span class="sd"> execution</span>
<span class="sd"> :type recreate: bool</span>
<span class="sd"> :param partition: target partition as a dict of partition columns</span>
<span class="sd"> and values. (templated)</span>
<span class="sd"> :type partition: dict</span>
<span class="sd"> :param delimiter: field delimiter in the file</span>
<span class="sd"> :type delimiter: str</span>
<span class="sd"> :param mysql_conn_id: source mysql connection</span>
<span class="sd"> :type mysql_conn_id: str</span>
<span class="sd"> :param hive_conn_id: destination hive connection</span>
<span class="sd"> :type hive_conn_id: str</span>
<span class="sd"> :param tblproperties: TBLPROPERTIES of the hive table being created</span>
<span class="sd"> :type tblproperties: dict</span>
<span class="sd"> &quot;&quot;&quot;</span>
<div class="viewcode-block" id="MySqlToHiveTransfer.template_fields"><a class="viewcode-back" href="../../../_api/airflow/operators/mysql_to_hive/index.html#airflow.operators.mysql_to_hive.MySqlToHiveTransfer.template_fields">[docs]</a> <span class="n">template_fields</span> <span class="o">=</span> <span class="p">(</span><span class="s1">&#39;sql&#39;</span><span class="p">,</span> <span class="s1">&#39;partition&#39;</span><span class="p">,</span> <span class="s1">&#39;hive_table&#39;</span><span class="p">)</span></div>
<div class="viewcode-block" id="MySqlToHiveTransfer.template_ext"><a class="viewcode-back" href="../../../_api/airflow/operators/mysql_to_hive/index.html#airflow.operators.mysql_to_hive.MySqlToHiveTransfer.template_ext">[docs]</a> <span class="n">template_ext</span> <span class="o">=</span> <span class="p">(</span><span class="s1">&#39;.sql&#39;</span><span class="p">,)</span></div>
<div class="viewcode-block" id="MySqlToHiveTransfer.ui_color"><a class="viewcode-back" href="../../../_api/airflow/operators/mysql_to_hive/index.html#airflow.operators.mysql_to_hive.MySqlToHiveTransfer.ui_color">[docs]</a> <span class="n">ui_color</span> <span class="o">=</span> <span class="s1">&#39;#a0e08c&#39;</span></div>
<span class="nd">@apply_defaults</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="n">sql</span><span class="p">,</span>
<span class="n">hive_table</span><span class="p">,</span>
<span class="n">create</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span>
<span class="n">recreate</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span>
<span class="n">partition</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
<span class="n">delimiter</span><span class="o">=</span><span class="nb">chr</span><span class="p">(</span><span class="mi">1</span><span class="p">),</span>
<span class="n">mysql_conn_id</span><span class="o">=</span><span class="s1">&#39;mysql_default&#39;</span><span class="p">,</span>
<span class="n">hive_cli_conn_id</span><span class="o">=</span><span class="s1">&#39;hive_cli_default&#39;</span><span class="p">,</span>
<span class="n">tblproperties</span><span class="o">=</span><span class="kc">None</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">MySqlToHiveTransfer</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">sql</span> <span class="o">=</span> <span class="n">sql</span>
<span class="bp">self</span><span class="o">.</span><span class="n">hive_table</span> <span class="o">=</span> <span class="n">hive_table</span>
<span class="bp">self</span><span class="o">.</span><span class="n">partition</span> <span class="o">=</span> <span class="n">partition</span>
<span class="bp">self</span><span class="o">.</span><span class="n">create</span> <span class="o">=</span> <span class="n">create</span>
<span class="bp">self</span><span class="o">.</span><span class="n">recreate</span> <span class="o">=</span> <span class="n">recreate</span>
<span class="bp">self</span><span class="o">.</span><span class="n">delimiter</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="n">delimiter</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">mysql_conn_id</span> <span class="o">=</span> <span class="n">mysql_conn_id</span>
<span class="bp">self</span><span class="o">.</span><span class="n">hive_cli_conn_id</span> <span class="o">=</span> <span class="n">hive_cli_conn_id</span>
<span class="bp">self</span><span class="o">.</span><span class="n">partition</span> <span class="o">=</span> <span class="n">partition</span> <span class="ow">or</span> <span class="p">{}</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tblproperties</span> <span class="o">=</span> <span class="n">tblproperties</span>
<span class="nd">@classmethod</span>
<div class="viewcode-block" id="MySqlToHiveTransfer.type_map"><a class="viewcode-back" href="../../../_api/airflow/operators/mysql_to_hive/index.html#airflow.operators.mysql_to_hive.MySqlToHiveTransfer.type_map">[docs]</a> <span class="k">def</span> <span class="nf">type_map</span><span class="p">(</span><span class="bp">cls</span><span class="p">,</span> <span class="n">mysql_type</span><span class="p">):</span>
<span class="n">t</span> <span class="o">=</span> <span class="n">MySQLdb</span><span class="o">.</span><span class="n">constants</span><span class="o">.</span><span class="n">FIELD_TYPE</span>
<span class="n">d</span> <span class="o">=</span> <span class="p">{</span>
<span class="n">t</span><span class="o">.</span><span class="n">BIT</span><span class="p">:</span> <span class="s1">&#39;INT&#39;</span><span class="p">,</span>
<span class="n">t</span><span class="o">.</span><span class="n">DECIMAL</span><span class="p">:</span> <span class="s1">&#39;DOUBLE&#39;</span><span class="p">,</span>
<span class="n">t</span><span class="o">.</span><span class="n">NEWDECIMAL</span><span class="p">:</span> <span class="s1">&#39;DOUBLE&#39;</span><span class="p">,</span>
<span class="n">t</span><span class="o">.</span><span class="n">DOUBLE</span><span class="p">:</span> <span class="s1">&#39;DOUBLE&#39;</span><span class="p">,</span>
<span class="n">t</span><span class="o">.</span><span class="n">FLOAT</span><span class="p">:</span> <span class="s1">&#39;DOUBLE&#39;</span><span class="p">,</span>
<span class="n">t</span><span class="o">.</span><span class="n">INT24</span><span class="p">:</span> <span class="s1">&#39;INT&#39;</span><span class="p">,</span>
<span class="n">t</span><span class="o">.</span><span class="n">LONG</span><span class="p">:</span> <span class="s1">&#39;BIGINT&#39;</span><span class="p">,</span>
<span class="n">t</span><span class="o">.</span><span class="n">LONGLONG</span><span class="p">:</span> <span class="s1">&#39;DECIMAL(38,0)&#39;</span><span class="p">,</span>
<span class="n">t</span><span class="o">.</span><span class="n">SHORT</span><span class="p">:</span> <span class="s1">&#39;INT&#39;</span><span class="p">,</span>
<span class="n">t</span><span class="o">.</span><span class="n">TINY</span><span class="p">:</span> <span class="s1">&#39;SMALLINT&#39;</span><span class="p">,</span>
<span class="n">t</span><span class="o">.</span><span class="n">YEAR</span><span class="p">:</span> <span class="s1">&#39;INT&#39;</span><span class="p">,</span>
<span class="n">t</span><span class="o">.</span><span class="n">TIMESTAMP</span><span class="p">:</span> <span class="s1">&#39;TIMESTAMP&#39;</span><span class="p">,</span>
<span class="p">}</span>
<span class="k">return</span> <span class="n">d</span><span class="p">[</span><span class="n">mysql_type</span><span class="p">]</span> <span class="k">if</span> <span class="n">mysql_type</span> <span class="ow">in</span> <span class="n">d</span> <span class="k">else</span> <span class="s1">&#39;STRING&#39;</span></div>
<div class="viewcode-block" id="MySqlToHiveTransfer.execute"><a class="viewcode-back" href="../../../_api/airflow/operators/mysql_to_hive/index.html#airflow.operators.mysql_to_hive.MySqlToHiveTransfer.execute">[docs]</a> <span class="k">def</span> <span class="nf">execute</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">context</span><span class="p">):</span>
<span class="n">hive</span> <span class="o">=</span> <span class="n">HiveCliHook</span><span class="p">(</span><span class="n">hive_cli_conn_id</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">hive_cli_conn_id</span><span class="p">)</span>
<span class="n">mysql</span> <span class="o">=</span> <span class="n">MySqlHook</span><span class="p">(</span><span class="n">mysql_conn_id</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">mysql_conn_id</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">&quot;Dumping MySQL query results to local file&quot;</span><span class="p">)</span>
<span class="n">conn</span> <span class="o">=</span> <span class="n">mysql</span><span class="o">.</span><span class="n">get_conn</span><span class="p">()</span>
<span class="n">cursor</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">cursor</span><span class="p">()</span>
<span class="n">cursor</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">sql</span><span class="p">)</span>
<span class="k">with</span> <span class="n">NamedTemporaryFile</span><span class="p">(</span><span class="s2">&quot;wb&quot;</span><span class="p">)</span> <span class="k">as</span> <span class="n">f</span><span class="p">:</span>
<span class="n">csv_writer</span> <span class="o">=</span> <span class="n">csv</span><span class="o">.</span><span class="n">writer</span><span class="p">(</span><span class="n">f</span><span class="p">,</span> <span class="n">delimiter</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">delimiter</span><span class="p">,</span>
<span class="n">encoding</span><span class="o">=</span><span class="s2">&quot;utf-8&quot;</span><span class="p">)</span>
<span class="n">field_dict</span> <span class="o">=</span> <span class="n">OrderedDict</span><span class="p">()</span>
<span class="k">for</span> <span class="n">field</span> <span class="ow">in</span> <span class="n">cursor</span><span class="o">.</span><span class="n">description</span><span class="p">:</span>
<span class="n">field_dict</span><span class="p">[</span><span class="n">field</span><span class="p">[</span><span class="mi">0</span><span class="p">]]</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">type_map</span><span class="p">(</span><span class="n">field</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span>
<span class="n">csv_writer</span><span class="o">.</span><span class="n">writerows</span><span class="p">(</span><span class="n">cursor</span><span class="p">)</span>
<span class="n">f</span><span class="o">.</span><span class="n">flush</span><span class="p">()</span>
<span class="n">cursor</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="n">conn</span><span class="o">.</span><span class="n">close</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">&quot;Loading file into Hive&quot;</span><span class="p">)</span>
<span class="n">hive</span><span class="o">.</span><span class="n">load_file</span><span class="p">(</span>
<span class="n">f</span><span class="o">.</span><span class="n">name</span><span class="p">,</span>
<span class="bp">self</span><span class="o">.</span><span class="n">hive_table</span><span class="p">,</span>
<span class="n">field_dict</span><span class="o">=</span><span class="n">field_dict</span><span class="p">,</span>
<span class="n">create</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">create</span><span class="p">,</span>
<span class="n">partition</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">partition</span><span class="p">,</span>
<span class="n">delimiter</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">delimiter</span><span class="p">,</span>
<span class="n">recreate</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">recreate</span><span class="p">,</span>
<span class="n">tblproperties</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">tblproperties</span><span class="p">)</span></div></div>
</pre></div>
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