chore: add unique constraint to tagged_objects (#26654)

superset/migrations/migration_utils.py

@@ -0,0 +1,46 @@
+# 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.
+
+from alembic.operations import BatchOperations, Operations
+
+naming_convention = {
+    "fk": "fk_%(table_name)s_%(column_0_name)s_%(referred_table_name)s",
+    "uq": "uq_%(table_name)s_%(column_0_name)s",
+}
+
+
+def create_unique_constraint(
+    op: Operations, index_id: str, table_name: str, uix_columns: list[str]
+) -> None:
+    with op.batch_alter_table(
+        table_name, naming_convention=naming_convention
+    ) as batch_op:
+        batch_op.create_unique_constraint(index_id, uix_columns)
+
+
+def drop_unique_constraint(op: Operations, index_id: str, table_name: str) -> None:
+    dialect = op.get_bind().dialect.name
+
+    with op.batch_alter_table(
+        table_name, naming_convention=naming_convention
+    ) as batch_op:
+        if dialect == "mysql":
+            # MySQL requires specifying the type of constraint
+            batch_op.drop_constraint(index_id, type_="unique")
+        else:
+            # For other databases, a standard drop_constraint call is sufficient
+            batch_op.drop_constraint(index_id)