| # 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. |
| """Delete table_name unique constraint in mysql |
| |
| Revision ID: 18532d70ab98 |
| Revises: 3fbbc6e8d654 |
| Create Date: 2020-09-25 10:56:13.711182 |
| |
| """ |
| |
| # revision identifiers, used by Alembic. |
| revision = "18532d70ab98" |
| down_revision = "3fbbc6e8d654" |
| |
| from alembic import op |
| from sqlalchemy.dialects.mysql.base import MySQLDialect |
| from sqlalchemy.engine.reflection import Inspector |
| |
| from superset.utils.core import generic_find_uq_constraint_name |
| |
| |
| def upgrade(): |
| bind = op.get_bind() |
| |
| # Uniqueness constraint if present only exists in MySQL. |
| if isinstance(bind.dialect, MySQLDialect): |
| constraint_name = generic_find_uq_constraint_name( |
| "tables", {"table_name"}, Inspector.from_engine(bind) |
| ) |
| |
| if constraint_name: |
| op.drop_constraint(constraint_name, "tables", type_="unique") |
| |
| |
| def downgrade(): |
| pass |