ALTER TABLE `apw_Cart` ADD `hasSponsorship` ENUM( 'y', 'n' ) NULL DEFAULT NULL AFTER `roleId` ,
ADD INDEX ( `hasSponsorship` );

-- UPDATE apw_Cart SET hasSponsorship = NULL;
UPDATE apw_Cart AS c
SET c.hasSponsorship = IFNULL(
  (
    SELECT 'y'
    FROM apw_CartItem AS ci
    WHERE ci.cartId = c.id
      AND ci.cartItemType = 'Sponsor_Category_'
    LIMIT 1
  ), 'n')
WHERE c.transactionId IS NOT NULL AND c.hasSponsorship IS NULL;