-- Preserve the ZYT fulfillment status before an EJ pharmacy submission.
-- EJ review rejection restores this value; it is not customer refusal.
SET @schema_name := DATABASE();

SET @ddl := IF(
  EXISTS (
    SELECT 1 FROM information_schema.COLUMNS
    WHERE TABLE_SCHEMA = @schema_name
      AND TABLE_NAME = 'zyt_tcm_prescription_order'
      AND COLUMN_NAME = 'ej_pharmacy_previous_fulfillment_status'
  ),
  'SELECT 1',
  'ALTER TABLE `zyt_tcm_prescription_order` ADD COLUMN `ej_pharmacy_previous_fulfillment_status` tinyint unsigned NULL DEFAULT NULL COMMENT ''Fulfillment status before EJ pharmacy submission'' AFTER `ej_pharmacy_status_version`'
);
PREPARE stmt FROM @ddl; EXECUTE stmt; DEALLOCATE PREPARE stmt;