airflow 0021_1_7_1_add_pid_field_to_taskinstance 源码
airflow 0021_1_7_1_add_pid_field_to_taskinstance 代码
文件路径：/airflow/migrations/versions/0021_1_7_1_add_pid_field_to_taskinstance.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
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"""Add ``pid`` field to ``TaskInstance``
Revision ID: 5e7d17757c7a
Revises: 8504051e801b
Create Date: 2016-12-07 15:51:37.119478
"""
from __future__ import annotations
import sqlalchemy as sa
from alembic import op
# revision identifiers, used by Alembic.
revision = '5e7d17757c7a'
down_revision = '8504051e801b'
branch_labels = None
depends_on = None
airflow_version = '1.7.1.3'
def upgrade():
"""Add pid column to task_instance table."""
op.add_column('task_instance', sa.Column('pid', sa.Integer))
def downgrade():
"""Drop pid column from task_instance table."""
op.drop_column('task_instance', 'pid')
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