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5.2.0

prisma/prisma

版本发布时间: 2023-08-22 23:33:08

prisma/prisma最新发布版本:5.19.1(2024-09-02 22:57:37)

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Highlights

Improved Prisma Client experience for Prisma Accelerate and Data Proxy

In this release, we’ve made the following improvements to Prisma Client when using Prisma Accelerate or Prisma Data Proxy:

Simplified connection string override in Prisma Client

This release simplifies the API used when programmatically overriding the connection string by introducing the datasourceUrl property in Prisma Client’s constructor. This means you do not have to use the datasource name defined in your Prisma schema.

const prisma = new PrismaClient({
  datasourceUrl: "postgresql://johndoe:randompassword@localhost:5432/mydb",
})

Query performance improvements

Continuing our work from 5.1.0 we made further performance improvements around the queries Prisma executes, targeting one-to-many relation fields and nested updates.

Use LIMIT in one-to-many relations on a single parent

In cases where there is a single parent with a one-to-many relation included (findFirst, findUnique, findMany({ take: 1 })), we now utilize LIMIT at the database level to restrict the number of related items returned instead of retrieving all related items into memory and performing a take in memory.

For situations where you have many related objects but only need a few, you should see a dramatic improvement in speed and memory usage.

Note: we are still working on bringing this improvement to other parts of Prisma Client in upcoming releases. If multiple parent records are returned, the previous behavior is used.

Further improvements for nested writes

Thanks to our introduction of using RETURNING in some cases in 5.1.0, we could now improve performance in nested writes by removing reload nodes. This will now result in one less query per relation traversed in a nested write. For more info, check out the pull request.

Prisma Client query

await prisma.post.update({
  where: { id: 1 },
  data: {
    comment: {
      update: { 
        data: {
          body: "Updated comment body"
        }
      }
    }
  },
  select: {
    id: true,
    title: true,
  }
})

Before v5.2.0

SELECT "Post"."id", "Post"."title" FROM "Post" WHERE ("Post"."id" = $1 AND 1=1) LIMIT $2 OFFSET $3
SELECT "Post"."id", "Post"."userId" FROM "Post" WHERE "Post"."id" = $1 OFFSET $2
SELECT "User"."id" FROM "User" WHERE (1=1 AND "User"."id" IN ($1)) OFFSET $2
SELECT "User"."id" FROM "User" WHERE ("User"."id" = $1 AND 1=1) LIMIT $2 OFFSET $3
SELECT "User"."id", "User"."commentId" FROM "User" WHERE "User"."id" = $1 OFFSET $2
SELECT "Comment"."id" FROM "Comment" WHERE (1=1 AND "Comment"."id" IN ($1)) OFFSET $2
UPDATE "Comment" SET "body" = $1 WHERE ("Comment"."id" = $2 AND 1=1) RETURNING "Comment"."id"
SELECT "Post"."id", "Post"."title" FROM "Post" WHERE "Post"."id" = $1 LIMIT $2 OFFSET $3

5.2.0 and later

SELECT "Post"."id", "Post"."title", "Post"."userId" FROM "Post" WHERE ("Post"."id" = $1 AND 1=1) LIMIT $2 OFFSET $3
SELECT "User"."id" FROM "User" WHERE (1=1 AND "User"."id" IN ($1)) OFFSET $2
SELECT "User"."id", "User"."commentId" FROM "User" WHERE ("User"."id" = $1 AND 1=1) LIMIT $2 OFFSET $3
SELECT "Comment"."id" FROM "Comment" WHERE (1=1 AND "Comment"."id" IN ($1)) OFFSET $2
UPDATE "Comment" SET "body" = $1 WHERE ("Comment"."id" = $2 AND 1=1) RETURNING "Comment"."id"
SELECT "Post"."id", "Post"."title" FROM "Post" WHERE "Post"."id" = $1 LIMIT $2 OFFSET $3

Fixes and improvements

Prisma Client

Prisma Migrate

Credits

Huge thanks to @skyzh, @alula, @michaelpoellath, @RobertCraigie, @darthmaim, @Gerschtli, @andyjy, @mejiaej, @iurylippo, @mrazauskas, @coder246, @RDIL for helping!

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