Add example project using Prisma

[amotl]

About

Verify Prisma works well with CrateDB.

Details

The code has been scaffolded like this:

npx try-prisma@latest --template javascript/script --install npm --name . --path .

Thoughts

Two pointers shared by @BaurzhanSakhariev. Thanks!

• Support for CockroachDB in Prisma ORM prisma/prisma#2523
• CDB: CockroachDB Support Epic prisma/prisma#10491
• CRDBGA: CockroachDB General Availability Epic prisma/prisma#12385

/cc @proddata, @hammerhead, @hlcianfagna, @simonprickett, @kneth

[amotl]

Prisma wants to run a CREATE SCHEMA command when using a connection string like postgresql://crate@localhost:5432/mydb?schema=public.

$ npx prisma migrate dev --name init
Prisma schema loaded from prisma/schema.prisma
Datasource "db": PostgreSQL database "mydb", schema "public" at "localhost:5432"

Error: Schema engine error:
ERROR: line 1:8: no viable alternative at input 'CREATE SCHEMA'

[amotl]

When using postgresql://crate@localhost:5432/?schema=doc as database connection string, it trips on the CREATE DATABASE statement.

Error: P3014

Prisma Migrate could not create the shadow database. Please make sure the database user has permission to create databases. Read more about the shadow database (and workarounds) at https://pris.ly/d/migrate-shadow

Original error:
ERROR: line 1:8: no viable alternative at input 'CREATE DATABASE'
   0: schema_core::state::DevDiagnostic
             at schema-engine/core/src/state.rs:270

[hlcianfagna]

• Support CREATE SCHEMA and DROP SCHEMA crate#14601

[amotl]

Maybe this mechanism can be used to make CrateDB work, so that Prisma is no longer failing right away on migrate dev?

In some cases it might make sense (e.g. when creating and dropping databases is not allowed on cloud-hosted databases) to manually define the connection string and name of the database that should be used as the shadow database for migrate dev.

-- https://www.prisma.io/docs/orm/prisma-migrate/understanding-prisma-migrate/shadow-database#manually-configuring-the-shadow-database

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch amo/prisma

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[kneth]

Support for CREATE SCHEMA was merged recently and we might need to wait for CrateDB 6.2 to be released before finalizing this example.

[amotl]

Thanks. We may need to look into the CREATE DATABASE obstacle, see above.