| # 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. |
| """drop tables constraint |
| |
| Revision ID: 31b2a1039d4a |
| Revises: ae1ed299413b |
| Create Date: 2021-07-27 08:25:20.755453 |
| |
| """ |
| |
| from alembic import op |
| from sqlalchemy import engine |
| from sqlalchemy.exc import OperationalError, ProgrammingError |
| |
| from superset.utils.core import generic_find_uq_constraint_name |
| |
| # revision identifiers, used by Alembic. |
| revision = "31b2a1039d4a" |
| down_revision = "ae1ed299413b" |
| |
| conv = {"uq": "uq_%(table_name)s_%(column_0_name)s"} |
| |
| |
| def upgrade(): |
| bind = op.get_bind() |
| insp = engine.reflection.Inspector.from_engine(bind) |
| |
| # Drop the uniqueness constraint if it exists. |
| constraint = generic_find_uq_constraint_name("tables", {"table_name"}, insp) |
| |
| if constraint: |
| with op.batch_alter_table("tables", naming_convention=conv) as batch_op: |
| batch_op.drop_constraint(constraint, type_="unique") |
| |
| |
| def downgrade(): |
| |
| # One cannot simply re-add the uniqueness constraint as it may not have previously |
| # existed. |
| pass |