1 files changed, 19 insertions, 0 deletions
diff --git a/db/migrate/20210303091651_add_index_to_environments_tier.rb b/db/migrate/20210303091651_add_index_to_environments_tier.rb
new file mode 100644
index 00000000000..0ec876945d9
--- /dev/null
+++ b/db/migrate/20210303091651_add_index_to_environments_tier.rb
@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+class AddIndexToEnvironmentsTier < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  disable_ddl_transaction!
+
+  INDEX_NAME = 'index_environments_on_project_id_and_tier'
+
+  DOWNTIME = false
+
+  def up
+    add_concurrent_index :environments, [:project_id, :tier], where: 'tier IS NOT NULL', name: INDEX_NAME
+  end
+
+  def down
+    remove_concurrent_index :environments, :state, name: INDEX_NAME
+  end
+end