airflow 0061_2_0_0_increase_length_of_pool_name 源码
airflow 0061_2_0_0_increase_length_of_pool_name 代码
文件路径：/airflow/migrations/versions/0061_2_0_0_increase_length_of_pool_name.py
#
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# to you under the Apache License, Version 2.0 (the
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"""Increase length of pool name
Revision ID: b25a55525161
Revises: bbf4a7ad0465
Create Date: 2020-03-09 08:48:14.534700
"""
from __future__ import annotations
import sqlalchemy as sa
from alembic import op
from airflow.models.base import COLLATION_ARGS
# revision identifiers, used by Alembic.
revision = 'b25a55525161'
down_revision = 'bbf4a7ad0465'
branch_labels = None
depends_on = None
airflow_version = '2.0.0'
def upgrade():
"""Increase column length of pool name from 50 to 256 characters"""
# use batch_alter_table to support SQLite workaround
with op.batch_alter_table('slot_pool', table_args=sa.UniqueConstraint('pool')) as batch_op:
batch_op.alter_column('pool', type_=sa.String(256, **COLLATION_ARGS))
def downgrade():
"""Revert Increased length of pool name from 256 to 50 characters"""
with op.batch_alter_table('slot_pool', table_args=sa.UniqueConstraint('pool')) as batch_op:
batch_op.alter_column('pool', type_=sa.String(50))
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