[GitHub] [airflow] Tomme commented on a change in pull request #5077: [AIRFLOW-4268] Add MsSqlToGoogleCloudStorageOperator

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Tomme commented on a change in pull request #5077: [AIRFLOW-4268] Add MsSqlToGoogleCloudStorageOperator
URL: https://github.com/apache/airflow/pull/5077#discussion_r274336208
 
 

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 File path: airflow/contrib/operators/mssql_to_gcs.py
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 @@ -0,0 +1,224 @@
+# -*- coding: utf-8 -*-
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+import sys
+import json
+import decimal
+
+from airflow.models import BaseOperator
+from airflow.utils.decorators import apply_defaults
+from airflow.contrib.hooks.gcs_hook import GoogleCloudStorageHook
+from airflow.hooks.mssql_hook import MsSqlHook
+from tempfile import NamedTemporaryFile
+
+PY3 = sys.version_info[0] == 3
+
+
+class DecimalEncoder(json.JSONEncoder):
+    def default(self, o):
+        if isinstance(o, decimal.Decimal):
+            return float(o)
+        return super(DecimalEncoder, self).default(o)
+
+
+class MsSqlToGoogleCloudStorageOperator(BaseOperator):
+    """
+    Copy data from Microsoft SQL Server to Google Cloud Storage
+    in JSON format.
+    """
+    template_fields = ('sql', 'bucket', 'filename', 'schema_filename')
+    template_ext = ('.sql',)
+
+    ui_color = '#e0a98c'
+
+    @apply_defaults
+    def __init__(self,
+                 sql,
+                 bucket,
+                 filename,
+                 schema_filename=None,
+                 approx_max_file_size_bytes=1900000000,
+                 mssql_conn_id='mssql_default',
+                 google_cloud_storage_conn_id='google_cloud_default',
+                 delegate_to=None,
+                 *args,
+                 **kwargs):
+        """
+        :param sql: The SQL to execute on the MSSQL table.
+        :type sql: str
+        :param bucket: The bucket to upload to.
+        :type bucket: str
+        :param filename: 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.
+        :type filename: str
+        :param schema_filename: 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 MSSQL.
+        :type schema_filename: str
+        :param approx_max_file_size_bytes: This operator supports the ability
+            to split large table dumps into multiple files. Google Cloud Storage
+            allows for files to be a maximum of 4GB. This param allows
+            developers to specify the file size of the splits.
+        :type approx_max_file_size_bytes: long
+        :param mssql_conn_id: Reference to a specific MSSQL hook.
+        :type mssql_conn_id: str
+        :param google_cloud_storage_conn_id: Reference to a specific Google
+            cloud storage hook.
+        :type google_cloud_storage_conn_id: str
+        :param delegate_to: The account to impersonate, if any. For this to
+            work, the service account making the request must have domain-wide
+            delegation enabled.
 
 Review comment:
   Resolved with [797c4e1](https://github.com/apache/airflow/pull/5077/commits/797c4e11c0c4eab873ed8e3a4843646665d6b407).

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