airflow 0077_2_0_0_change_field_in_dagcode_to_mediumtext_ 源码
airflow 0077_2_0_0_change_field_in_dagcode_tomediumtext 代码
文件路径：/airflow/migrations/versions/0077_2_0_0_change_field_in_dagcode_tomediumtext.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.
"""Change field in ``DagCode`` to ``MEDIUMTEXT`` for MySql
Revision ID: e959f08ac86c
Revises: 64a7d6477aae
Create Date: 2020-12-07 16:31:43.982353
"""
from __future__ import annotations
from alembic import op
from sqlalchemy.dialects import mysql
# revision identifiers, used by Alembic.
revision = 'e959f08ac86c'
down_revision = '64a7d6477aae'
branch_labels = None
depends_on = None
airflow_version = '2.0.0'
def upgrade():
conn = op.get_bind()
if conn.dialect.name == "mysql":
op.alter_column(
table_name='dag_code', column_name='source_code', type_=mysql.MEDIUMTEXT, nullable=False
)
def downgrade():
# Do not downgrade to TEXT as it will break data
pass
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