Mybatis plus 查询

1、子查询

        // 管理主管查询
        Integer manageSupervisor = query.getManageSupervisor();
        if (manageSupervisor != null)
        {
            queryWrapper
                    .apply("account IN (SELECT account FROM t_account_beneficiary WHERE platform = 58 AND supervisor_manager = " + manageSupervisor + ")");
        }

2、数据库切换就近原则

@DS("")

3、springboot缓存

@Caching(put = {@CachePut(key = "#result.id", condition = CacheCondition.ADD_TO_ALL), @CachePut(key = "#result.account")})

4、排序

        // 排序方式
        switch (query.getOrderBy())
        {
            // 价格升序
            case "PRICE_ASC":
                queryWrapper.orderByAsc(CdiscountOffer::getPrice);
                break;
            // 价格降序
            case "PRICE_DESC":
                queryWrapper.orderByDesc(CdiscountOffer::getPrice);
                break;
            // 库存升序
            case "STOCK_ASC":
                queryWrapper.orderByAsc(CdiscountOffer::getStock);
                break;
            // 库存降序
            case "STOCK_DESC":
                queryWrapper.orderByDesc(CdiscountOffer::getStock);
                break;
            default:
                break;
        }

5.insql

        queryWrapper.inSql(sb.length() > 0, CdiscountOffer::getSystemSku, PRODUCT_SQL + sb);