superset 2019-12-03_13-50_89115a40e8ea_change_table_schema_description_to_long_ 源码
superset 2019-12-03_13-50_89115a40e8ea_change_table_schema_description_tolong 代码
文件路径：/superset/migrations/versions/2019-12-03_13-50_89115a40e8ea_change_table_schema_description_tolong.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
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# under the License.
"""Change table schema description to long text
Revision ID: 89115a40e8ea
Revises: 5afa9079866a
Create Date: 2019-12-03 13:50:24.746867
"""
# revision identifiers, used by Alembic.
revision = "89115a40e8ea"
down_revision = "5afa9079866a"
import sqlalchemy as sa
from alembic import op
from sqlalchemy.databases import mysql
from sqlalchemy.dialects.mysql.base import MySQLDialect
def upgrade():
bind = op.get_bind()
if isinstance(bind.dialect, MySQLDialect):
with op.batch_alter_table("table_schema") as batch_op:
batch_op.alter_column(
"description", existing_type=sa.Text, type_=mysql.LONGTEXT
)
def downgrade():
bind = op.get_bind()
if isinstance(bind.dialect, MySQLDialect):
with op.batch_alter_table("table_schema") as batch_op:
batch_op.alter_column(
"description", existing_type=mysql.LONGTEXT, type_=sa.Text
)
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