airflow 0056_1_10_12_add_dag_hash_column_to_serialized_dag_ 源码
airflow 0056_1_10_12_add_dag_hash_column_to_serializeddag 代码
文件路径：/airflow/migrations/versions/0056_1_10_12_add_dag_hash_column_to_serializeddag.py
#
# 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 ``dag_hash`` Column to ``serialized_dag`` table
Revision ID: da3f683c3a5a
Revises: a66efa278eea
Create Date: 2020-08-07 20:52:09.178296
"""
from __future__ import annotations
import sqlalchemy as sa
from alembic import op
# revision identifiers, used by Alembic.
revision = 'da3f683c3a5a'
down_revision = 'a66efa278eea'
branch_labels = None
depends_on = None
airflow_version = '1.10.12'
def upgrade():
"""Apply Add ``dag_hash`` Column to ``serialized_dag`` table"""
op.add_column(
'serialized_dag',
sa.Column('dag_hash', sa.String(32), nullable=False, server_default='Hash not calculated yet'),
)
def downgrade():
"""Unapply Add ``dag_hash`` Column to ``serialized_dag`` table"""
op.drop_column('serialized_dag', 'dag_hash')
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