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| <div class="section" id="module-airflow.contrib.operators.cassandra_to_gcs"> |
| <span id="airflow-contrib-operators-cassandra-to-gcs"></span><h1><a class="reference internal" href="#module-airflow.contrib.operators.cassandra_to_gcs" title="airflow.contrib.operators.cassandra_to_gcs"><code class="xref py py-mod docutils literal notranslate"><span class="pre">airflow.contrib.operators.cassandra_to_gcs</span></code></a><a class="headerlink" href="#module-airflow.contrib.operators.cassandra_to_gcs" title="Permalink to this headline">¶</a></h1> |
| <div class="section" id="module-contents"> |
| <h2>Module Contents<a class="headerlink" href="#module-contents" title="Permalink to this headline">¶</a></h2> |
| <dl class="class"> |
| <dt id="airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator"> |
| <em class="property">class </em><code class="sig-prename descclassname">airflow.contrib.operators.cassandra_to_gcs.</code><code class="sig-name descname">CassandraToGoogleCloudStorageOperator</code><span class="sig-paren">(</span><em class="sig-param">cql</em>, <em class="sig-param">bucket</em>, <em class="sig-param">filename</em>, <em class="sig-param">schema_filename=None</em>, <em class="sig-param">approx_max_file_size_bytes=1900000000</em>, <em class="sig-param">cassandra_conn_id='cassandra_default'</em>, <em class="sig-param">google_cloud_storage_conn_id='google_cloud_default'</em>, <em class="sig-param">delegate_to=None</em>, <em class="sig-param">*args</em>, <em class="sig-param">**kwargs</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/cassandra_to_gcs.html#CassandraToGoogleCloudStorageOperator"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Bases: <a class="reference internal" href="../../../models/index.html#airflow.models.BaseOperator" title="airflow.models.BaseOperator"><code class="xref py py-class docutils literal notranslate"><span class="pre">airflow.models.BaseOperator</span></code></a></p> |
| <p>Copy data from Cassandra to Google cloud storage in JSON format</p> |
| <p>Note: Arrays of arrays are not supported.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Parameters</dt> |
| <dd class="field-odd"><ul class="simple"> |
| <li><p><strong>cql</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.7)"><em>str</em></a>) – The CQL to execute on the Cassandra table.</p></li> |
| <li><p><strong>bucket</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.7)"><em>str</em></a>) – The bucket to upload to.</p></li> |
| <li><p><strong>filename</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.7)"><em>str</em></a>) – The filename to use as the object name when uploading |
| to Google cloud storage. A {} should be specified in the filename |
| to allow the operator to inject file numbers in cases where the |
| file is split due to size.</p></li> |
| <li><p><strong>schema_filename</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.7)"><em>str</em></a>) – If set, the filename to use as the object name |
| when uploading a .json file containing the BigQuery schema fields |
| for the table that was dumped from MySQL.</p></li> |
| <li><p><strong>approx_max_file_size_bytes</strong> (<em>long</em>) – This operator supports the ability |
| to split large table dumps into multiple files (see notes in the |
| filename param docs above). This param allows developers to specify the |
| file size of the splits. Check <a class="reference external" href="https://cloud.google.com/storage/quotas">https://cloud.google.com/storage/quotas</a> |
| to see the maximum allowed file size for a single object.</p></li> |
| <li><p><strong>cassandra_conn_id</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.7)"><em>str</em></a>) – Reference to a specific Cassandra hook.</p></li> |
| <li><p><strong>google_cloud_storage_conn_id</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.7)"><em>str</em></a>) – Reference to a specific Google |
| cloud storage hook.</p></li> |
| <li><p><strong>delegate_to</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.7)"><em>str</em></a>) – The account to impersonate, if any. For this to |
| work, the service account making the request must have domain-wide |
| delegation enabled.</p></li> |
| </ul> |
| </dd> |
| </dl> |
| <dl class="attribute"> |
| <dt id="airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.template_fields"> |
| <code class="sig-name descname">template_fields</code><em class="property"> = ['cql', 'bucket', 'filename', 'schema_filename']</em><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/cassandra_to_gcs.html#CassandraToGoogleCloudStorageOperator.template_fields"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.template_fields" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="attribute"> |
| <dt id="airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.template_ext"> |
| <code class="sig-name descname">template_ext</code><em class="property"> = ['.cql']</em><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/cassandra_to_gcs.html#CassandraToGoogleCloudStorageOperator.template_ext"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.template_ext" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="attribute"> |
| <dt id="airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.ui_color"> |
| <code class="sig-name descname">ui_color</code><em class="property"> = #a0e08c</em><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/cassandra_to_gcs.html#CassandraToGoogleCloudStorageOperator.ui_color"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.ui_color" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="attribute"> |
| <dt id="airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.CQL_TYPE_MAP"> |
| <code class="sig-name descname">CQL_TYPE_MAP</code><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/cassandra_to_gcs.html#CassandraToGoogleCloudStorageOperator.CQL_TYPE_MAP"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.CQL_TYPE_MAP" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.execute"> |
| <code class="sig-name descname">execute</code><span class="sig-paren">(</span><em class="sig-param">self</em>, <em class="sig-param">context</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/cassandra_to_gcs.html#CassandraToGoogleCloudStorageOperator.execute"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.execute" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator._query_cassandra"> |
| <code class="sig-name descname">_query_cassandra</code><span class="sig-paren">(</span><em class="sig-param">self</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/cassandra_to_gcs.html#CassandraToGoogleCloudStorageOperator._query_cassandra"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator._query_cassandra" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Queries cassandra and returns a cursor to the results.</p> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator._write_local_data_files"> |
| <code class="sig-name descname">_write_local_data_files</code><span class="sig-paren">(</span><em class="sig-param">self</em>, <em class="sig-param">cursor</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/cassandra_to_gcs.html#CassandraToGoogleCloudStorageOperator._write_local_data_files"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator._write_local_data_files" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Takes a cursor, and writes results to a local file.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Returns</dt> |
| <dd class="field-odd"><p>A dictionary where keys are filenames to be used as object |
| names in GCS, and values are file handles to local files that |
| contain the data for the GCS objects.</p> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator._write_local_schema_file"> |
| <code class="sig-name descname">_write_local_schema_file</code><span class="sig-paren">(</span><em class="sig-param">self</em>, <em class="sig-param">cursor</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/cassandra_to_gcs.html#CassandraToGoogleCloudStorageOperator._write_local_schema_file"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator._write_local_schema_file" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Takes a cursor, and writes the BigQuery schema for the results to a |
| local file system.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Returns</dt> |
| <dd class="field-odd"><p>A dictionary where key is a filename to be used as an object |
| name in GCS, and values are file handles to local files that |
| contains the BigQuery schema fields in .json format.</p> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator._upload_to_gcs"> |
| <code class="sig-name descname">_upload_to_gcs</code><span class="sig-paren">(</span><em class="sig-param">self</em>, <em class="sig-param">files_to_upload</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/cassandra_to_gcs.html#CassandraToGoogleCloudStorageOperator._upload_to_gcs"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator._upload_to_gcs" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.generate_data_dict"> |
| <em class="property">classmethod </em><code class="sig-name descname">generate_data_dict</code><span class="sig-paren">(</span><em class="sig-param">cls</em>, <em class="sig-param">names</em>, <em class="sig-param">values</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/cassandra_to_gcs.html#CassandraToGoogleCloudStorageOperator.generate_data_dict"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.generate_data_dict" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.convert_value"> |
| <em class="property">classmethod </em><code class="sig-name descname">convert_value</code><span class="sig-paren">(</span><em class="sig-param">cls</em>, <em class="sig-param">name</em>, <em class="sig-param">value</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/cassandra_to_gcs.html#CassandraToGoogleCloudStorageOperator.convert_value"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.convert_value" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.convert_array_types"> |
| <em class="property">classmethod </em><code class="sig-name descname">convert_array_types</code><span class="sig-paren">(</span><em class="sig-param">cls</em>, <em class="sig-param">name</em>, <em class="sig-param">value</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/cassandra_to_gcs.html#CassandraToGoogleCloudStorageOperator.convert_array_types"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.convert_array_types" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.convert_user_type"> |
| <em class="property">classmethod </em><code class="sig-name descname">convert_user_type</code><span class="sig-paren">(</span><em class="sig-param">cls</em>, <em class="sig-param">name</em>, <em class="sig-param">value</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/cassandra_to_gcs.html#CassandraToGoogleCloudStorageOperator.convert_user_type"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.convert_user_type" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Converts a user type to RECORD that contains n fields, where n is the |
| number of attributes. Each element in the user type class will be converted to its |
| corresponding data type in BQ.</p> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.convert_tuple_type"> |
| <em class="property">classmethod </em><code class="sig-name descname">convert_tuple_type</code><span class="sig-paren">(</span><em class="sig-param">cls</em>, <em class="sig-param">name</em>, <em class="sig-param">value</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/cassandra_to_gcs.html#CassandraToGoogleCloudStorageOperator.convert_tuple_type"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.convert_tuple_type" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Converts a tuple to RECORD that contains n fields, each will be converted |
| to its corresponding data type in bq and will be named ‘field_<index>’, where |
| index is determined by the order of the tuple elements defined in cassandra.</p> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.convert_map_type"> |
| <em class="property">classmethod </em><code class="sig-name descname">convert_map_type</code><span class="sig-paren">(</span><em class="sig-param">cls</em>, <em class="sig-param">name</em>, <em class="sig-param">value</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/cassandra_to_gcs.html#CassandraToGoogleCloudStorageOperator.convert_map_type"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.convert_map_type" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Converts a map to a repeated RECORD that contains two fields: ‘key’ and ‘value’, |
| each will be converted to its corresponding data type in BQ.</p> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.generate_schema_dict"> |
| <em class="property">classmethod </em><code class="sig-name descname">generate_schema_dict</code><span class="sig-paren">(</span><em class="sig-param">cls</em>, <em class="sig-param">name</em>, <em class="sig-param">type</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/cassandra_to_gcs.html#CassandraToGoogleCloudStorageOperator.generate_schema_dict"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.generate_schema_dict" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.get_bq_fields"> |
| <em class="property">classmethod </em><code class="sig-name descname">get_bq_fields</code><span class="sig-paren">(</span><em class="sig-param">cls</em>, <em class="sig-param">name</em>, <em class="sig-param">type</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/cassandra_to_gcs.html#CassandraToGoogleCloudStorageOperator.get_bq_fields"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.get_bq_fields" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.is_simple_type"> |
| <em class="property">classmethod </em><code class="sig-name descname">is_simple_type</code><span class="sig-paren">(</span><em class="sig-param">cls</em>, <em class="sig-param">type</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/cassandra_to_gcs.html#CassandraToGoogleCloudStorageOperator.is_simple_type"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.is_simple_type" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.is_array_type"> |
| <em class="property">classmethod </em><code class="sig-name descname">is_array_type</code><span class="sig-paren">(</span><em class="sig-param">cls</em>, <em class="sig-param">type</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/cassandra_to_gcs.html#CassandraToGoogleCloudStorageOperator.is_array_type"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.is_array_type" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.is_record_type"> |
| <em class="property">classmethod </em><code class="sig-name descname">is_record_type</code><span class="sig-paren">(</span><em class="sig-param">cls</em>, <em class="sig-param">type</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/cassandra_to_gcs.html#CassandraToGoogleCloudStorageOperator.is_record_type"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.is_record_type" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.get_bq_type"> |
| <em class="property">classmethod </em><code class="sig-name descname">get_bq_type</code><span class="sig-paren">(</span><em class="sig-param">cls</em>, <em class="sig-param">type</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/cassandra_to_gcs.html#CassandraToGoogleCloudStorageOperator.get_bq_type"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.get_bq_type" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="method"> |
| <dt id="airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.get_bq_mode"> |
| <em class="property">classmethod </em><code class="sig-name descname">get_bq_mode</code><span class="sig-paren">(</span><em class="sig-param">cls</em>, <em class="sig-param">type</em><span class="sig-paren">)</span><a class="reference internal" href="../../../../../_modules/airflow/contrib/operators/cassandra_to_gcs.html#CassandraToGoogleCloudStorageOperator.get_bq_mode"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#airflow.contrib.operators.cassandra_to_gcs.CassandraToGoogleCloudStorageOperator.get_bq_mode" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| </dd></dl> |
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