Merge branch 'ab/index-on-status' into 'master'

Create status index for batched migrations

See merge request gitlab-org/gitlab!84470

db/migrate/20220406121831_add_index_on_status_for_batched_background_migrations.rb

+# frozen_string_literal: true
+
+class AddIndexOnStatusForBatchedBackgroundMigrations < Gitlab::Database::Migration[1.0]
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_index :batched_background_migrations, :status
+  end
+
+  def down
+    remove_concurrent_index_by_name :batched_background_migrations, :index_batched_background_migrations_on_status
+  end
+end

db/schema_migrations/20220406121831

+687ba844d775918956f16dee16548f0440506e66e91afd5f52410066ffd5e364
\ No newline at end of file

db/structure.sql

@@ -26806,6 +26806,8 @@ CREATE INDEX index_badges_on_group_id ON badges USING btree (group_id);
 
 CREATE INDEX index_badges_on_project_id ON badges USING btree (project_id);
 
+CREATE INDEX index_batched_background_migrations_on_status ON batched_background_migrations USING btree (status);
+
 CREATE UNIQUE INDEX index_batched_background_migrations_on_unique_configuration ON batched_background_migrations USING btree (job_class_name, table_name, column_name, job_arguments);
 
 CREATE INDEX index_batched_jobs_by_batched_migration_id_and_id ON batched_background_migration_jobs USING btree (batched_background_migration_id, id);