mysql 添加删除索引
alter table partner_order add index promotion_id_idx (promotion_id); alter table partner_order add index out_trade_id_idx (out_trade_id);
drop index promotion_id_idx on partner_order; drop index out_trade_id_idx on partner_order;
alter table partner_order add index promotion_id_idx (promotion_id); alter table partner_order add index out_trade_id_idx (out_trade_id);
drop index promotion_id_idx on partner_order; drop index out_trade_id_idx on partner_order;