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<h1>Source code for airflow.contrib.hooks.aws_glue_catalog_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">from</span> <span class="nn">airflow.contrib.hooks.aws_hook</span> <span class="k">import</span> <span class="n">AwsHook</span>
<div class="viewcode-block" id="AwsGlueCatalogHook"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/aws_glue_catalog_hook/index.html#airflow.contrib.hooks.aws_glue_catalog_hook.AwsGlueCatalogHook">[docs]</a><span class="k">class</span> <span class="nc">AwsGlueCatalogHook</span><span class="p">(</span><span class="n">AwsHook</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Interact with AWS Glue Catalog</span>
<span class="sd"> :param aws_conn_id: ID of the Airflow connection where</span>
<span class="sd"> credentials and extra configuration are stored</span>
<span class="sd"> :type aws_conn_id: str</span>
<span class="sd"> :param region_name: aws region name (example: us-east-1)</span>
<span class="sd"> :type region_name: str</span>
<span class="sd"> &quot;&quot;&quot;</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">aws_conn_id</span><span class="o">=</span><span class="s1">&#39;aws_default&#39;</span><span class="p">,</span>
<span class="n">region_name</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="bp">self</span><span class="o">.</span><span class="n">region_name</span> <span class="o">=</span> <span class="n">region_name</span>
<span class="nb">super</span><span class="p">(</span><span class="n">AwsGlueCatalogHook</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="n">aws_conn_id</span><span class="o">=</span><span class="n">aws_conn_id</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span>
<div class="viewcode-block" id="AwsGlueCatalogHook.get_conn"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/aws_glue_catalog_hook/index.html#airflow.contrib.hooks.aws_glue_catalog_hook.AwsGlueCatalogHook.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 glue connection object.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="bp">self</span><span class="o">.</span><span class="n">conn</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_client_type</span><span class="p">(</span><span class="s1">&#39;glue&#39;</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">region_name</span><span class="p">)</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">conn</span></div>
<div class="viewcode-block" id="AwsGlueCatalogHook.get_partitions"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/aws_glue_catalog_hook/index.html#airflow.contrib.hooks.aws_glue_catalog_hook.AwsGlueCatalogHook.get_partitions">[docs]</a> <span class="k">def</span> <span class="nf">get_partitions</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span>
<span class="n">database_name</span><span class="p">,</span>
<span class="n">table_name</span><span class="p">,</span>
<span class="n">expression</span><span class="o">=</span><span class="s1">&#39;&#39;</span><span class="p">,</span>
<span class="n">page_size</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
<span class="n">max_items</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Retrieves the partition values for a table.</span>
<span class="sd"> :param database_name: The name of the catalog database where the partitions reside.</span>
<span class="sd"> :type database_name: str</span>
<span class="sd"> :param table_name: The name of the partitions&#39; table.</span>
<span class="sd"> :type table_name: str</span>
<span class="sd"> :param expression: An expression filtering the partitions to be returned.</span>
<span class="sd"> Please see official AWS documentation for further information.</span>
<span class="sd"> https://docs.aws.amazon.com/glue/latest/dg/aws-glue-api-catalog-partitions.html#aws-glue-api-catalog-partitions-GetPartitions</span>
<span class="sd"> :type expression: str</span>
<span class="sd"> :param page_size: pagination size</span>
<span class="sd"> :type page_size: int</span>
<span class="sd"> :param max_items: maximum items to return</span>
<span class="sd"> :type max_items: int</span>
<span class="sd"> :return: set of partition values where each value is a tuple since</span>
<span class="sd"> a partition may be composed of multiple columns. For example:</span>
<span class="sd"> ``{(&#39;2018-01-01&#39;,&#39;1&#39;), (&#39;2018-01-01&#39;,&#39;2&#39;)}``</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">config</span> <span class="o">=</span> <span class="p">{</span>
<span class="s1">&#39;PageSize&#39;</span><span class="p">:</span> <span class="n">page_size</span><span class="p">,</span>
<span class="s1">&#39;MaxItems&#39;</span><span class="p">:</span> <span class="n">max_items</span><span class="p">,</span>
<span class="p">}</span>
<span class="n">paginator</span> <span class="o">=</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">get_paginator</span><span class="p">(</span><span class="s1">&#39;get_partitions&#39;</span><span class="p">)</span>
<span class="n">response</span> <span class="o">=</span> <span class="n">paginator</span><span class="o">.</span><span class="n">paginate</span><span class="p">(</span>
<span class="n">DatabaseName</span><span class="o">=</span><span class="n">database_name</span><span class="p">,</span>
<span class="n">TableName</span><span class="o">=</span><span class="n">table_name</span><span class="p">,</span>
<span class="n">Expression</span><span class="o">=</span><span class="n">expression</span><span class="p">,</span>
<span class="n">PaginationConfig</span><span class="o">=</span><span class="n">config</span>
<span class="p">)</span>
<span class="n">partitions</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span>
<span class="k">for</span> <span class="n">page</span> <span class="ow">in</span> <span class="n">response</span><span class="p">:</span>
<span class="k">for</span> <span class="n">p</span> <span class="ow">in</span> <span class="n">page</span><span class="p">[</span><span class="s1">&#39;Partitions&#39;</span><span class="p">]:</span>
<span class="n">partitions</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="nb">tuple</span><span class="p">(</span><span class="n">p</span><span class="p">[</span><span class="s1">&#39;Values&#39;</span><span class="p">]))</span>
<span class="k">return</span> <span class="n">partitions</span></div>
<div class="viewcode-block" id="AwsGlueCatalogHook.check_for_partition"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/aws_glue_catalog_hook/index.html#airflow.contrib.hooks.aws_glue_catalog_hook.AwsGlueCatalogHook.check_for_partition">[docs]</a> <span class="k">def</span> <span class="nf">check_for_partition</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">database_name</span><span class="p">,</span> <span class="n">table_name</span><span class="p">,</span> <span class="n">expression</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Checks whether a partition exists</span>
<span class="sd"> :param database_name: Name of hive database (schema) @table belongs to</span>
<span class="sd"> :type database_name: str</span>
<span class="sd"> :param table_name: Name of hive table @partition belongs to</span>
<span class="sd"> :type table_name: str</span>
<span class="sd"> :expression: Expression that matches the partitions to check for</span>
<span class="sd"> (eg `a = &#39;b&#39; AND c = &#39;d&#39;`)</span>
<span class="sd"> :type expression: str</span>
<span class="sd"> :rtype: bool</span>
<span class="sd"> &gt;&gt;&gt; hook = AwsGlueCatalogHook()</span>
<span class="sd"> &gt;&gt;&gt; t = &#39;static_babynames_partitioned&#39;</span>
<span class="sd"> &gt;&gt;&gt; hook.check_for_partition(&#39;airflow&#39;, t, &quot;ds=&#39;2015-01-01&#39;&quot;)</span>
<span class="sd"> True</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">partitions</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_partitions</span><span class="p">(</span><span class="n">database_name</span><span class="p">,</span> <span class="n">table_name</span><span class="p">,</span> <span class="n">expression</span><span class="p">,</span> <span class="n">max_items</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
<span class="k">if</span> <span class="n">partitions</span><span class="p">:</span>
<span class="k">return</span> <span class="kc">True</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="kc">False</span></div>
<div class="viewcode-block" id="AwsGlueCatalogHook.get_table"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/aws_glue_catalog_hook/index.html#airflow.contrib.hooks.aws_glue_catalog_hook.AwsGlueCatalogHook.get_table">[docs]</a> <span class="k">def</span> <span class="nf">get_table</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">database_name</span><span class="p">,</span> <span class="n">table_name</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Get the information of the table</span>
<span class="sd"> :param database_name: Name of hive database (schema) @table belongs to</span>
<span class="sd"> :type database_name: str</span>
<span class="sd"> :param table_name: Name of hive table</span>
<span class="sd"> :type table_name: str</span>
<span class="sd"> :rtype: dict</span>
<span class="sd"> &gt;&gt;&gt; hook = AwsGlueCatalogHook()</span>
<span class="sd"> &gt;&gt;&gt; r = hook.get_table(&#39;db&#39;, &#39;table_foo&#39;)</span>
<span class="sd"> &gt;&gt;&gt; r[&#39;Name&#39;] = &#39;table_foo&#39;</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">result</span> <span class="o">=</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">get_table</span><span class="p">(</span><span class="n">DatabaseName</span><span class="o">=</span><span class="n">database_name</span><span class="p">,</span> <span class="n">Name</span><span class="o">=</span><span class="n">table_name</span><span class="p">)</span>
<span class="k">return</span> <span class="n">result</span><span class="p">[</span><span class="s1">&#39;Table&#39;</span><span class="p">]</span></div>
<div class="viewcode-block" id="AwsGlueCatalogHook.get_table_location"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/aws_glue_catalog_hook/index.html#airflow.contrib.hooks.aws_glue_catalog_hook.AwsGlueCatalogHook.get_table_location">[docs]</a> <span class="k">def</span> <span class="nf">get_table_location</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">database_name</span><span class="p">,</span> <span class="n">table_name</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Get the physical location of the table</span>
<span class="sd"> :param database_name: Name of hive database (schema) @table belongs to</span>
<span class="sd"> :type database_name: str</span>
<span class="sd"> :param table_name: Name of hive table</span>
<span class="sd"> :type table_name: str</span>
<span class="sd"> :return: str</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">table</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_table</span><span class="p">(</span><span class="n">database_name</span><span class="p">,</span> <span class="n">table_name</span><span class="p">)</span>
<span class="k">return</span> <span class="n">table</span><span class="p">[</span><span class="s1">&#39;StorageDescriptor&#39;</span><span class="p">][</span><span class="s1">&#39;Location&#39;</span><span class="p">]</span></div></div>
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