airflow 0008_1_6_0_task_duration 源码
airflow 0008_1_6_0_task_duration 代码
文件路径：/airflow/migrations/versions/0008_1_6_0_task_duration.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
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"""Change ``task_instance.task_duration`` type to ``FLOAT``
Revision ID: 2e541a1dcfed
Revises: 1b38cef5b76e
Create Date: 2015-10-28 20:38:41.266143
"""
from __future__ import annotations
import sqlalchemy as sa
from alembic import op
from sqlalchemy.dialects import mysql
# revision identifiers, used by Alembic.
revision = '2e541a1dcfed'
down_revision = '1b38cef5b76e'
branch_labels = None
depends_on = None
airflow_version = '1.6.0'
def upgrade():
# use batch_alter_table to support SQLite workaround
with op.batch_alter_table("task_instance") as batch_op:
batch_op.alter_column(
'duration',
existing_type=mysql.INTEGER(display_width=11),
type_=sa.Float(),
existing_nullable=True,
)
def downgrade():
pass
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