airflow 0082_2_1_0_increase_pool_name_size_in_taskinstance 源码
airflow 0082_2_1_0_increase_pool_name_size_in_taskinstance 代码
文件路径：/airflow/migrations/versions/0082_2_1_0_increase_pool_name_size_in_taskinstance.py
#
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# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
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"""Increase maximum length of pool name in ``task_instance`` table to ``256`` characters
Revision ID: 90d1635d7b86
Revises: 2e42bb497a22
Create Date: 2021-04-05 09:37:54.848731
"""
from __future__ import annotations
import sqlalchemy as sa
from alembic import op
# revision identifiers, used by Alembic.
revision = '90d1635d7b86'
down_revision = '2e42bb497a22'
branch_labels = None
depends_on = None
airflow_version = '2.1.0'
def upgrade():
"""Apply Increase maximum length of pool name in ``task_instance`` table to ``256`` characters"""
with op.batch_alter_table('task_instance') as batch_op:
batch_op.alter_column('pool', type_=sa.String(256), nullable=False)
def downgrade():
"""Unapply Increase maximum length of pool name in ``task_instance`` table to ``256`` characters"""
conn = op.get_bind()
if conn.dialect.name == 'mssql':
with op.batch_alter_table('task_instance') as batch_op:
batch_op.drop_index('ti_pool')
batch_op.alter_column('pool', type_=sa.String(50), nullable=False)
batch_op.create_index('ti_pool', ['pool'])
else:
with op.batch_alter_table('task_instance') as batch_op:
batch_op.alter_column('pool', type_=sa.String(50), nullable=False)
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