Add index on enabled boolean

db/migrate/20211026061420_add_indexes_for_email_reminder_pause.rb

@@ -0,0 +1,15 @@
+require_relative './migration_utils/utils'
+
+class AddIndexesForEmailReminderPause < ActiveRecord::Migration[6.1]
+  include ::Migration::Utils
+
+  def up
+    add_index :user_preferences,
+              "((user_preferences.settings->'pause_reminders'->>'enabled')::boolean)",
+              name: :index_user_prefs_settings_pause_reminders_enabled
+  end
+
+  def down
+    remove_index_if_exists :user_preferences, :index_user_prefs_settings_pause_reminders_enabled
+  end
+end