Merge branch '35223-drop-unused-user-id-column-on-cluster-providers-aws' into 'master'

Remove unused cluster_providers_aws.created_by_user_id column

See merge request gitlab-org/gitlab!43064

changelogs/unreleased/35223-drop-unused-user-id-column-on-cluster-providers-aws.yml

+---
+title: Remove unused cluster_providers_aws.created_by_user_id column
+merge_request: 43064
+author:
+type: other

db/post_migrate/20200922231755_remove_created_by_user_id_from_cluster_providers_aws.rb

+# frozen_string_literal: true
+
+class RemoveCreatedByUserIdFromClusterProvidersAws < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+  INDEX_NAME = 'index_cluster_providers_aws_on_created_by_user_id'
+
+  disable_ddl_transaction!
+
+  def up
+    with_lock_retries do
+      remove_column :cluster_providers_aws, :created_by_user_id
+    end
+  end
+
+  def down
+    unless column_exists?(:cluster_providers_aws, :created_by_user_id)
+      add_column :cluster_providers_aws, :created_by_user_id, :integer
+    end
+
+    add_concurrent_index :cluster_providers_aws, :created_by_user_id, name: INDEX_NAME
+
+    add_concurrent_foreign_key :cluster_providers_aws, :users, column: :created_by_user_id, on_delete: :nullify
+  end
+end

db/schema_migrations/20200922231755

+0019105cd2112e138b9926dc000b0c54b41fca6dfb2c4f658900040e0ecb3b70
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