airflow 0037_1_10_2_add_task_reschedule_table 源码
airflow 0037_1_10_2_add_task_reschedule_table 代码
文件路径：/airflow/migrations/versions/0037_1_10_2_add_task_reschedule_table.py
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# 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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# software distributed under the License is distributed on an
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"""Add ``task_reschedule`` table
Revision ID: 0a2a5b66e19d
Revises: 9635ae0956e7
Create Date: 2018-06-17 22:50:00.053620
"""
from __future__ import annotations
import sqlalchemy as sa
from alembic import op
from airflow.migrations.db_types import TIMESTAMP, StringID
# revision identifiers, used by Alembic.
revision = '0a2a5b66e19d'
down_revision = '9635ae0956e7'
branch_labels = None
depends_on = None
airflow_version = '1.10.2'
TABLE_NAME = 'task_reschedule'
INDEX_NAME = 'idx_' + TABLE_NAME + '_dag_task_date'
def upgrade():
# See 0e2a74e0fc9f_add_time_zone_awareness
timestamp = TIMESTAMP
if op.get_bind().dialect.name == 'mssql':
# We need to keep this as it was for this old migration on mssql
timestamp = sa.DateTime()
op.create_table(
TABLE_NAME,
sa.Column('id', sa.Integer(), nullable=False),
sa.Column('task_id', StringID(), nullable=False),
sa.Column('dag_id', StringID(), nullable=False),
# use explicit server_default=None otherwise mysql implies defaults for first timestamp column
sa.Column('execution_date', timestamp, nullable=False, server_default=None),
sa.Column('try_number', sa.Integer(), nullable=False),
sa.Column('start_date', timestamp, nullable=False),
sa.Column('end_date', timestamp, nullable=False),
sa.Column('duration', sa.Integer(), nullable=False),
sa.Column('reschedule_date', timestamp, nullable=False),
sa.PrimaryKeyConstraint('id'),
sa.ForeignKeyConstraint(
['task_id', 'dag_id', 'execution_date'],
['task_instance.task_id', 'task_instance.dag_id', 'task_instance.execution_date'],
name='task_reschedule_dag_task_date_fkey',
),
)
op.create_index(INDEX_NAME, TABLE_NAME, ['dag_id', 'task_id', 'execution_date'], unique=False)
def downgrade():
op.drop_index(INDEX_NAME, table_name=TABLE_NAME)
op.drop_table(TABLE_NAME)
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