superset/migrations/versions/2023-06-08_10-22_4c5da39be729_migrate_treemap_chart.py
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"""migrate_treemap_chart
Revision ID: 4c5da39be729
Revises: 9ba2ce3086e5
Create Date: 2023-06-08 10:22:23.192064
"""
from alembic import op
from sqlalchemy.dialects.mysql.base import MySQLDialect
from superset import db
from superset.migrations.shared.migrate_viz import MigrateTreeMap
# revision identifiers, used by Alembic.
revision = "4c5da39be729"
down_revision = "9ba2ce3086e5"
def upgrade():
bind = op.get_bind()
# 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(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")
session = db.Session(bind=bind)
MigrateTreeMap.upgrade(session)
def downgrade():
bind = op.get_bind()
session = db.Session(bind=bind)
MigrateTreeMap.downgrade(session)