superset 2022-07-07_13-00_c747c78868b6_migrating_legacy_treemap 源码
superset 2022-07-07_13-00_c747c78868b6_migrating_legacy_treemap 代码
文件路径：/superset/migrations/versions/2022-07-07_13-00_c747c78868b6_migrating_legacy_treemap.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
# under the License.
"""Migrating legacy TreeMap
Revision ID: c747c78868b6
Revises: cdcf3d64daf4
Create Date: 2022-06-30 22:04:17.686635
"""
from alembic import op
from sqlalchemy.dialects.mysql.base import MySQLDialect
from superset.migrations.shared.migrate_viz import MigrateTreeMap
# revision identifiers, used by Alembic.
revision = "c747c78868b6"
down_revision = "cdcf3d64daf4"
def upgrade():
# Ensure `slice.params` and `slice.query_context`` in MySQL is MEDIUMTEXT
# before migration, as the migration will save a duplicate form_data backup
# which may significantly increase the size of these fields.
if isinstance(op.get_bind().dialect, MySQLDialect):
# If the columns are already MEDIUMTEXT, this is a no-op
op.execute("ALTER TABLE slices MODIFY params MEDIUMTEXT")
op.execute("ALTER TABLE slices MODIFY query_context MEDIUMTEXT")
MigrateTreeMap.upgrade()
def downgrade():
MigrateTreeMap.downgrade()
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