text: 
  -- +migrate Up notransaction
  
  drop index if exists idx_alert_logs_alert_id;
  create index concurrently idx_alert_logs_alert_id on alert_logs (alert_id);
  
  
  drop index if exists idx_alert_logs_hb_id;
  create index concurrently idx_alert_logs_hb_id on alert_logs (sub_hb_monitor_id);
  
  drop index if exists idx_alert_logs_int_id;
  create index concurrently idx_alert_logs_int_id on alert_logs (sub_integration_key_id);
  
  drop index if exists idx_alert_logs_user_id;
  create index concurrently idx_alert_logs_user_id on alert_logs (sub_user_id);
  
  -- +migrate Down notransaction
  drop index if exists idx_alert_logs_alert_id;
  drop index if exists idx_alert_logs_hb_id;
  drop index if exists idx_alert_logs_int_id;
  drop index if exists idx_alert_logs_user_id;
  