ffinfo commented on a change in pull request #4396: [AIRFLOW-3585] - Add edges to database URL: https://github.com/apache/airflow/pull/4396#discussion_r259609805
########## File path: airflow/models/dag_edge.py ########## @@ -0,0 +1,53 @@ +# -*- 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. + +from sqlalchemy import Column, String, Index, Integer + +from airflow.utils.db import create_session + +from airflow.models.base import Base + + +class DagEdge(Base): + """ + This will store DAG edges. This will be the upstream and downstream dependencies of task inside a DAG. + """ + + __tablename__ = "dag_edge" + + dag_id = Column(String(250), primary_key=True) + graph_id = Column(Integer, primary_key=True) + task_from = Column(String(250), primary_key=True) + task_to = Column(String(250), primary_key=True) + + __table_args__ = (Index('idx_dag_edge', dag_id, graph_id, unique=False),) Review comment: There was some discussions about this above, not sure what to do with this now. I think that some database implementations do benefit from this index. Maybe someone has some comments about this? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] With regards, Apache Git Services
