Db: Drop redundant indexes for columns already having unique constraint

* inventories.provider_id
 * inventories.resource_class
 * placement_aggregates.uuid
 * resource_providers.name
 * resource_providers.uuid

Story: 2010251
Task: 46118

Change-Id: Ia834a991edf8f21ee9bea7f97399cd6c003b54e5

placement/db/sqlalchemy/alembic/versions/a082b8bb98d0_drop_redundant_indexes_for_unique_.py

@@ -0,0 +1,40 @@
+#    Licensed 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 redundant indexes for unique constraints
+
+Revision ID: a082b8bb98d0
+Revises: 422ece571366
+Create Date: 2022-09-09 15:52:21.644040
+
+"""
+from alembic import op
+
+
+# revision identifiers, used by Alembic.
+revision = 'a082b8bb98d0'
+down_revision = '422ece571366'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.drop_index('inventories_resource_provider_id_idx',
+                  table_name='inventories')
+    op.drop_index('inventories_resource_provider_resource_class_idx',
+                  table_name='inventories')
+    op.drop_index('ix_placement_aggregates_uuid',
+                  table_name='placement_aggregates')
+    op.drop_index('resource_providers_name_idx',
+                  table_name='resource_providers')
+    op.drop_index('resource_providers_uuid_idx',
+                  table_name='resource_providers')

placement/db/sqlalchemy/models.py

@@ -50,9 +50,7 @@ class ResourceProvider(BASE):
 
     __tablename__ = "resource_providers"
     __table_args__ = (
-        Index('resource_providers_uuid_idx', 'uuid'),
         schema.UniqueConstraint('uuid', name='uniq_resource_providers0uuid'),
-        Index('resource_providers_name_idx', 'name'),
         Index('resource_providers_root_provider_id_idx',
               'root_provider_id'),
         Index('resource_providers_parent_provider_id_idx',
@@ -78,12 +76,8 @@ class Inventory(BASE):
 
     __tablename__ = "inventories"
     __table_args__ = (
-        Index('inventories_resource_provider_id_idx',
-              'resource_provider_id'),
         Index('inventories_resource_class_id_idx',
               'resource_class_id'),
-        Index('inventories_resource_provider_resource_class_idx',
-              'resource_provider_id', 'resource_class_id'),
         schema.UniqueConstraint(
             'resource_provider_id', 'resource_class_id',
             name='uniq_inventories0resource_provider_resource_class')
@@ -151,7 +145,7 @@ class PlacementAggregate(BASE):
     )
 
     id = Column(Integer, primary_key=True, autoincrement=True)
-    uuid = Column(String(36), index=True)
+    uuid = Column(String(36))
 
 
 class Trait(BASE):