airflow 0047_1_10_4_increase_queue_name_size_limit 源码
airflow 0047_1_10_4_increase_queue_name_size_limit 代码
文件路径：/airflow/migrations/versions/0047_1_10_4_increase_queue_name_size_limit.py
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# to you under the Apache License, Version 2.0 (the
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"""Increase queue name size limit
Revision ID: 004c1210f153
Revises: 939bb1e647c8
Create Date: 2019-06-07 07:46:04.262275
"""
from __future__ import annotations
import sqlalchemy as sa
from alembic import op
# revision identifiers, used by Alembic.
revision = '004c1210f153'
down_revision = '939bb1e647c8'
branch_labels = None
depends_on = None
airflow_version = '1.10.4'
def upgrade():
"""
Increase column size from 50 to 256 characters, closing AIRFLOW-4737 caused
by broker backends that might use unusually large queue names.
"""
# use batch_alter_table to support SQLite workaround
with op.batch_alter_table('task_instance') as batch_op:
batch_op.alter_column('queue', type_=sa.String(256))
def downgrade():
"""Revert column size from 256 to 50 characters, might result in data loss."""
# use batch_alter_table to support SQLite workaround
with op.batch_alter_table('task_instance') as batch_op:
batch_op.alter_column('queue', type_=sa.String(50))
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