uranusjr commented on a change in pull request #16352:
URL: https://github.com/apache/airflow/pull/16352#discussion_r649376333



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File path: 
airflow/migrations/versions/142555e44c17_add_data_interval_start_end_to_dagrun.py
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@@ -0,0 +1,100 @@
+#
+# 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.
+
+"""Add data_interval_[start|end] to DagRun.
+
+Revision ID: 142555e44c17
+Revises: e9304a3141f0
+Create Date: 2021-06-09 08:28:02.089817
+
+"""
+
+import alembic
+import sqlalchemy
+
+from airflow.models import DagModel, DagRun

Review comment:
       I chose to only pull out a minimal set of fields we need in the 
migration (a trick I sometimes do to make the migrations more readable).




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