所以在我看来,GraphQL 更应该叫 TreeQL,当然在图论里,Tree 就是 Graph 也没毛病啦。需要注意的是,这也会引出 “N + 1 problem” 的话题——naive 的 GraphQL 服务端实现会让这段 query 变得异常慢! 怎么解决这个棘手的问题?心急的小伙伴请跳转到6.1 N+1 问题! 4. GraphQL 能做到修改数据吗? 看了上面...
GraphQL 作为一种更灵活的 API 服务提供方式,相比于传统的 Web 服务更容易出现上述问题,类似的问题在出现时也可能更加严重,所以我们更需要避免 N + 1 问题的发生。 数据库层面的 N + 1 查询我们可以通过减少 SQL 查询的次数来解决,一般我们会将多个 = 查询转换成 IN 查询;但是 GraphQL 中的 N + 1 问题...
所以在我看来,GraphQL 更应该叫 TreeQL,当然在图论里,Tree 就是 Graph 也没毛病啦。需要注意的是,这也会引出 “N + 1 problem” 的话题——naive 的 GraphQL 服务端实现会让这段 query 变得异常慢! 怎么解决这个棘手的问题?心急的小伙伴请跳转到 6.1 N+1 问题! 4. GraphQL 能做到修改数据吗? 看了上...
需要注意的是,这也会引出 "N + 1 problem" 的话题——naive 的 GraphQL 服务端实现会让这段 query 变得异常慢! 怎么解决这个棘手的问题?心急的小伙伴请跳转到 6.1 N+1 问题! 4. GraphQL 能做到修改数据吗? 看了上面的 query 的例子,你肯定很好奇,graphql 这种看上去好像只为查询而存在的语言,是不是...
它就像是一颗无限向下延伸的树。所以在我看来,GraphQL 更应该叫 TreeQL,当然在图论里,Tree 就是 Graph 也没毛病啦。需要注意的是,这也会引出 “N + 1 problem” 的话题——naive 的 GraphQL 服务端实现会让这段 query 变得异常慢! 怎么解决这个棘手的问题?心急的小伙伴请跳转到6.1 N+1 问题!
Underfetching and the n+1 problem Another issue isunderfetchingand then+1-requests problem. Underfetching generally means that a specific endpoint doesn’t provide enough of the required information. The client will have to make additional requests to fetch everything it needs. This can escalate ...
The DataLoader pattern, or tool, solves the N+1 query problem nicely. It’s also well documented by the Internet with lot of examples, especially for the JavaScript ecosystem. You may find some examples for Java as well, but what I was missing is a whole Sp...
In the scenario of solving the N+1 problem, DataLoader is used like this:The whole is divided into two stages. The first stage calls load , which is called N times, and the second stage calls dispatch . When dispatch is called, the data query will be executed, so as to achieve the ...
解决完N+1问题的效果 优化前 优化后 sql结果 解决方案 目前GraphQL通用的解决方案是Facebook提供的Dataloader, 他的核心思想是Batch Query和Cached. 每种语言都有自己的DataLoader的实现, 去Github都能找到 Laravel N+1的解决方法 目前我们采用的是PHP的Laravel GraphQL框架. 这个框架有两种解决N+1的问题 ...
This question has come my way a few times, “how do you run GraphQL on Azure?” and like any good problem, the answer to it is a solidit depends. When I've started to unpack the problem with people it comes down to wanting to find a service on Azure that does GraphQL, in...