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<h1>Source code for airflow.contrib.hooks.spark_jdbc_script</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="c1">#</span>
<span class="kn">import</span> <span class="nn">argparse</span>
<span class="kn">from</span> <span class="nn">pyspark.sql</span> <span class="k">import</span> <span class="n">SparkSession</span>
<div class="viewcode-block" id="set_common_options"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/spark_jdbc_script/index.html#airflow.contrib.hooks.spark_jdbc_script.set_common_options">[docs]</a><span class="k">def</span> <span class="nf">set_common_options</span><span class="p">(</span><span class="n">spark_source</span><span class="p">,</span>
<span class="n">url</span><span class="o">=</span><span class="s1">&#39;localhost:5432&#39;</span><span class="p">,</span>
<span class="n">jdbc_table</span><span class="o">=</span><span class="s1">&#39;default.default&#39;</span><span class="p">,</span>
<span class="n">user</span><span class="o">=</span><span class="s1">&#39;root&#39;</span><span class="p">,</span>
<span class="n">password</span><span class="o">=</span><span class="s1">&#39;root&#39;</span><span class="p">,</span>
<span class="n">driver</span><span class="o">=</span><span class="s1">&#39;driver&#39;</span><span class="p">):</span>
<span class="n">spark_source</span> <span class="o">=</span> <span class="n">spark_source</span> \
<span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="s1">&#39;jdbc&#39;</span><span class="p">)</span> \
<span class="o">.</span><span class="n">option</span><span class="p">(</span><span class="s1">&#39;url&#39;</span><span class="p">,</span> <span class="n">url</span><span class="p">)</span> \
<span class="o">.</span><span class="n">option</span><span class="p">(</span><span class="s1">&#39;dbtable&#39;</span><span class="p">,</span> <span class="n">jdbc_table</span><span class="p">)</span> \
<span class="o">.</span><span class="n">option</span><span class="p">(</span><span class="s1">&#39;user&#39;</span><span class="p">,</span> <span class="n">user</span><span class="p">)</span> \
<span class="o">.</span><span class="n">option</span><span class="p">(</span><span class="s1">&#39;password&#39;</span><span class="p">,</span> <span class="n">password</span><span class="p">)</span> \
<span class="o">.</span><span class="n">option</span><span class="p">(</span><span class="s1">&#39;driver&#39;</span><span class="p">,</span> <span class="n">driver</span><span class="p">)</span>
<span class="k">return</span> <span class="n">spark_source</span></div>
<div class="viewcode-block" id="spark_write_to_jdbc"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/spark_jdbc_script/index.html#airflow.contrib.hooks.spark_jdbc_script.spark_write_to_jdbc">[docs]</a><span class="k">def</span> <span class="nf">spark_write_to_jdbc</span><span class="p">(</span><span class="n">spark</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">user</span><span class="p">,</span> <span class="n">password</span><span class="p">,</span> <span class="n">metastore_table</span><span class="p">,</span> <span class="n">jdbc_table</span><span class="p">,</span> <span class="n">driver</span><span class="p">,</span>
<span class="n">truncate</span><span class="p">,</span> <span class="n">save_mode</span><span class="p">,</span> <span class="n">batch_size</span><span class="p">,</span> <span class="n">num_partitions</span><span class="p">,</span>
<span class="n">create_table_column_types</span><span class="p">):</span>
<span class="n">writer</span> <span class="o">=</span> <span class="n">spark</span> \
<span class="o">.</span><span class="n">table</span><span class="p">(</span><span class="n">metastore_table</span><span class="p">)</span> \
<span class="o">.</span><span class="n">write</span> \
<span class="c1"># first set common options</span>
<span class="n">writer</span> <span class="o">=</span> <span class="n">set_common_options</span><span class="p">(</span><span class="n">writer</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">jdbc_table</span><span class="p">,</span> <span class="n">user</span><span class="p">,</span> <span class="n">password</span><span class="p">,</span> <span class="n">driver</span><span class="p">)</span>
<span class="c1"># now set write-specific options</span>
<span class="k">if</span> <span class="n">truncate</span><span class="p">:</span>
<span class="n">writer</span> <span class="o">=</span> <span class="n">writer</span><span class="o">.</span><span class="n">option</span><span class="p">(</span><span class="s1">&#39;truncate&#39;</span><span class="p">,</span> <span class="n">truncate</span><span class="p">)</span>
<span class="k">if</span> <span class="n">batch_size</span><span class="p">:</span>
<span class="n">writer</span> <span class="o">=</span> <span class="n">writer</span><span class="o">.</span><span class="n">option</span><span class="p">(</span><span class="s1">&#39;batchsize&#39;</span><span class="p">,</span> <span class="n">batch_size</span><span class="p">)</span>
<span class="k">if</span> <span class="n">num_partitions</span><span class="p">:</span>
<span class="n">writer</span> <span class="o">=</span> <span class="n">writer</span><span class="o">.</span><span class="n">option</span><span class="p">(</span><span class="s1">&#39;numPartitions&#39;</span><span class="p">,</span> <span class="n">num_partitions</span><span class="p">)</span>
<span class="k">if</span> <span class="n">create_table_column_types</span><span class="p">:</span>
<span class="n">writer</span> <span class="o">=</span> <span class="n">writer</span><span class="o">.</span><span class="n">option</span><span class="p">(</span><span class="s2">&quot;createTableColumnTypes&quot;</span><span class="p">,</span> <span class="n">create_table_column_types</span><span class="p">)</span>
<span class="n">writer</span> \
<span class="o">.</span><span class="n">save</span><span class="p">(</span><span class="n">mode</span><span class="o">=</span><span class="n">save_mode</span><span class="p">)</span></div>
<div class="viewcode-block" id="spark_read_from_jdbc"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/spark_jdbc_script/index.html#airflow.contrib.hooks.spark_jdbc_script.spark_read_from_jdbc">[docs]</a><span class="k">def</span> <span class="nf">spark_read_from_jdbc</span><span class="p">(</span><span class="n">spark</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">user</span><span class="p">,</span> <span class="n">password</span><span class="p">,</span> <span class="n">metastore_table</span><span class="p">,</span> <span class="n">jdbc_table</span><span class="p">,</span> <span class="n">driver</span><span class="p">,</span>
<span class="n">save_mode</span><span class="p">,</span> <span class="n">save_format</span><span class="p">,</span> <span class="n">fetch_size</span><span class="p">,</span> <span class="n">num_partitions</span><span class="p">,</span>
<span class="n">partition_column</span><span class="p">,</span> <span class="n">lower_bound</span><span class="p">,</span> <span class="n">upper_bound</span><span class="p">):</span>
<span class="c1"># first set common options</span>
<span class="n">reader</span> <span class="o">=</span> <span class="n">set_common_options</span><span class="p">(</span><span class="n">spark</span><span class="o">.</span><span class="n">read</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">jdbc_table</span><span class="p">,</span> <span class="n">user</span><span class="p">,</span> <span class="n">password</span><span class="p">,</span> <span class="n">driver</span><span class="p">)</span>
<span class="c1"># now set specific read options</span>
<span class="k">if</span> <span class="n">fetch_size</span><span class="p">:</span>
<span class="n">reader</span> <span class="o">=</span> <span class="n">reader</span><span class="o">.</span><span class="n">option</span><span class="p">(</span><span class="s1">&#39;fetchsize&#39;</span><span class="p">,</span> <span class="n">fetch_size</span><span class="p">)</span>
<span class="k">if</span> <span class="n">num_partitions</span><span class="p">:</span>
<span class="n">reader</span> <span class="o">=</span> <span class="n">reader</span><span class="o">.</span><span class="n">option</span><span class="p">(</span><span class="s1">&#39;numPartitions&#39;</span><span class="p">,</span> <span class="n">num_partitions</span><span class="p">)</span>
<span class="k">if</span> <span class="n">partition_column</span> <span class="ow">and</span> <span class="n">lower_bound</span> <span class="ow">and</span> <span class="n">upper_bound</span><span class="p">:</span>
<span class="n">reader</span> <span class="o">=</span> <span class="n">reader</span> \
<span class="o">.</span><span class="n">option</span><span class="p">(</span><span class="s1">&#39;partitionColumn&#39;</span><span class="p">,</span> <span class="n">partition_column</span><span class="p">)</span> \
<span class="o">.</span><span class="n">option</span><span class="p">(</span><span class="s1">&#39;lowerBound&#39;</span><span class="p">,</span> <span class="n">lower_bound</span><span class="p">)</span> \
<span class="o">.</span><span class="n">option</span><span class="p">(</span><span class="s1">&#39;upperBound&#39;</span><span class="p">,</span> <span class="n">upper_bound</span><span class="p">)</span>
<span class="n">reader</span> \
<span class="o">.</span><span class="n">load</span><span class="p">()</span> \
<span class="o">.</span><span class="n">write</span> \
<span class="o">.</span><span class="n">saveAsTable</span><span class="p">(</span><span class="n">metastore_table</span><span class="p">,</span> <span class="nb">format</span><span class="o">=</span><span class="n">save_format</span><span class="p">,</span> <span class="n">mode</span><span class="o">=</span><span class="n">save_mode</span><span class="p">)</span></div>
<span class="k">if</span> <span class="vm">__name__</span> <span class="o">==</span> <span class="s2">&quot;__main__&quot;</span><span class="p">:</span> <span class="c1"># pragma: no cover</span>
<span class="c1"># parse the parameters</span>
<div class="viewcode-block" id="parser"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/spark_jdbc_script/index.html#airflow.contrib.hooks.spark_jdbc_script.parser">[docs]</a> <span class="n">parser</span> <span class="o">=</span> <span class="n">argparse</span><span class="o">.</span><span class="n">ArgumentParser</span><span class="p">(</span><span class="n">description</span><span class="o">=</span><span class="s1">&#39;Spark-JDBC&#39;</span><span class="p">)</span></div>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;-cmdType&#39;</span><span class="p">,</span> <span class="n">dest</span><span class="o">=</span><span class="s1">&#39;cmd_type&#39;</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">&#39;store&#39;</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;-url&#39;</span><span class="p">,</span> <span class="n">dest</span><span class="o">=</span><span class="s1">&#39;url&#39;</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">&#39;store&#39;</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;-user&#39;</span><span class="p">,</span> <span class="n">dest</span><span class="o">=</span><span class="s1">&#39;user&#39;</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">&#39;store&#39;</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;-password&#39;</span><span class="p">,</span> <span class="n">dest</span><span class="o">=</span><span class="s1">&#39;password&#39;</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">&#39;store&#39;</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;-metastoreTable&#39;</span><span class="p">,</span> <span class="n">dest</span><span class="o">=</span><span class="s1">&#39;metastore_table&#39;</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">&#39;store&#39;</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;-jdbcTable&#39;</span><span class="p">,</span> <span class="n">dest</span><span class="o">=</span><span class="s1">&#39;jdbc_table&#39;</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">&#39;store&#39;</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;-jdbcDriver&#39;</span><span class="p">,</span> <span class="n">dest</span><span class="o">=</span><span class="s1">&#39;jdbc_driver&#39;</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">&#39;store&#39;</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;-jdbcTruncate&#39;</span><span class="p">,</span> <span class="n">dest</span><span class="o">=</span><span class="s1">&#39;truncate&#39;</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">&#39;store&#39;</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;-saveMode&#39;</span><span class="p">,</span> <span class="n">dest</span><span class="o">=</span><span class="s1">&#39;save_mode&#39;</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">&#39;store&#39;</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;-saveFormat&#39;</span><span class="p">,</span> <span class="n">dest</span><span class="o">=</span><span class="s1">&#39;save_format&#39;</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">&#39;store&#39;</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;-batchsize&#39;</span><span class="p">,</span> <span class="n">dest</span><span class="o">=</span><span class="s1">&#39;batch_size&#39;</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">&#39;store&#39;</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;-fetchsize&#39;</span><span class="p">,</span> <span class="n">dest</span><span class="o">=</span><span class="s1">&#39;fetch_size&#39;</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">&#39;store&#39;</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;-name&#39;</span><span class="p">,</span> <span class="n">dest</span><span class="o">=</span><span class="s1">&#39;name&#39;</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">&#39;store&#39;</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;-numPartitions&#39;</span><span class="p">,</span> <span class="n">dest</span><span class="o">=</span><span class="s1">&#39;num_partitions&#39;</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">&#39;store&#39;</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;-partitionColumn&#39;</span><span class="p">,</span> <span class="n">dest</span><span class="o">=</span><span class="s1">&#39;partition_column&#39;</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">&#39;store&#39;</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;-lowerBound&#39;</span><span class="p">,</span> <span class="n">dest</span><span class="o">=</span><span class="s1">&#39;lower_bound&#39;</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">&#39;store&#39;</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;-upperBound&#39;</span><span class="p">,</span> <span class="n">dest</span><span class="o">=</span><span class="s1">&#39;upper_bound&#39;</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">&#39;store&#39;</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;-createTableColumnTypes&#39;</span><span class="p">,</span>
<span class="n">dest</span><span class="o">=</span><span class="s1">&#39;create_table_column_types&#39;</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">&#39;store&#39;</span><span class="p">)</span>
<span class="n">arguments</span> <span class="o">=</span> <span class="n">parser</span><span class="o">.</span><span class="n">parse_args</span><span class="p">()</span>
<span class="c1"># Disable dynamic allocation by default to allow num_executors to take effect.</span>
<span class="n">spark</span> <span class="o">=</span> <span class="n">SparkSession</span><span class="o">.</span><span class="n">builder</span> \
<span class="o">.</span><span class="n">appName</span><span class="p">(</span><span class="n">arguments</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> \
<span class="o">.</span><span class="n">enableHiveSupport</span><span class="p">()</span> \
<span class="o">.</span><span class="n">getOrCreate</span><span class="p">()</span>
<span class="k">if</span> <span class="n">arguments</span><span class="o">.</span><span class="n">cmd_type</span> <span class="o">==</span> <span class="s2">&quot;spark_to_jdbc&quot;</span><span class="p">:</span>
<span class="n">spark_write_to_jdbc</span><span class="p">(</span><span class="n">spark</span><span class="p">,</span>
<span class="n">arguments</span><span class="o">.</span><span class="n">url</span><span class="p">,</span>
<span class="n">arguments</span><span class="o">.</span><span class="n">user</span><span class="p">,</span>
<span class="n">arguments</span><span class="o">.</span><span class="n">password</span><span class="p">,</span>
<span class="n">arguments</span><span class="o">.</span><span class="n">metastore_table</span><span class="p">,</span>
<span class="n">arguments</span><span class="o">.</span><span class="n">jdbc_table</span><span class="p">,</span>
<span class="n">arguments</span><span class="o">.</span><span class="n">jdbc_driver</span><span class="p">,</span>
<span class="n">arguments</span><span class="o">.</span><span class="n">truncate</span><span class="p">,</span>
<span class="n">arguments</span><span class="o">.</span><span class="n">save_mode</span><span class="p">,</span>
<span class="n">arguments</span><span class="o">.</span><span class="n">batch_size</span><span class="p">,</span>
<span class="n">arguments</span><span class="o">.</span><span class="n">num_partitions</span><span class="p">,</span>
<span class="n">arguments</span><span class="o">.</span><span class="n">create_table_column_types</span><span class="p">)</span>
<span class="k">elif</span> <span class="n">arguments</span><span class="o">.</span><span class="n">cmd_type</span> <span class="o">==</span> <span class="s2">&quot;jdbc_to_spark&quot;</span><span class="p">:</span>
<span class="n">spark_read_from_jdbc</span><span class="p">(</span><span class="n">spark</span><span class="p">,</span>
<span class="n">arguments</span><span class="o">.</span><span class="n">url</span><span class="p">,</span>
<span class="n">arguments</span><span class="o">.</span><span class="n">user</span><span class="p">,</span>
<span class="n">arguments</span><span class="o">.</span><span class="n">password</span><span class="p">,</span>
<span class="n">arguments</span><span class="o">.</span><span class="n">metastore_table</span><span class="p">,</span>
<span class="n">arguments</span><span class="o">.</span><span class="n">jdbc_table</span><span class="p">,</span>
<span class="n">arguments</span><span class="o">.</span><span class="n">jdbc_driver</span><span class="p">,</span>
<span class="n">arguments</span><span class="o">.</span><span class="n">save_mode</span><span class="p">,</span>
<span class="n">arguments</span><span class="o">.</span><span class="n">save_format</span><span class="p">,</span>
<span class="n">arguments</span><span class="o">.</span><span class="n">fetch_size</span><span class="p">,</span>
<span class="n">arguments</span><span class="o">.</span><span class="n">num_partitions</span><span class="p">,</span>
<span class="n">arguments</span><span class="o">.</span><span class="n">partition_column</span><span class="p">,</span>
<span class="n">arguments</span><span class="o">.</span><span class="n">lower_bound</span><span class="p">,</span>
<span class="n">arguments</span><span class="o">.</span><span class="n">upper_bound</span><span class="p">)</span>
</pre></div>
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