🐛 BUG: when trying to left join 2 tables that have same name columns - second column is not returned

[AndriiSherman]

Which Cloudflare product(s) does this pertain to?

D1

What version of Wrangler are you using?

2.19.0

What operating system are you using?

macOS

Describe the Bug

As per issue #555 we can see, that d1 stopped returning duplicate names from different tables. It was working before and it's how any other driver is doing for raw mode

$ pnpm wrangler d1 execute dzltest --command='select "users"."id", "posts"."id", "posts"."ownerId", "posts"."title", "posts"."content" from "users" left join "posts" on "posts"."ownerId" = "users"."id";'

┌────┬─────────┬───────┬───────────┐
│ id │ ownerId │ title │ content   │
├────┼─────────┼───────┼───────────┤
│ 2  │ 1       │ test  │ 111111111 │
├────┼─────────┼───────┼───────────┤
│ 3  │ 1       │ ueoau │ ueueu     │
├────┼─────────┼───────┼───────────┤
│ 1  │ 1       │ xxx   │ yyy       │
└────┴─────────┴───────┴───────────┘

But should return id for user and id for posts as well
Expected

┌────┬────┬─────────┬───────┬───────────┐
│ id │ id │ ownerId │ title │ content   │
├────┼────┼─────────┼───────┼───────────┤
│ 2  │ 1  │    1    │ test  │ 111111111 │
├────┼────┼─────────┼───────┼───────────┤
│ 3  │ 2  │    1    │ ueoau │ ueueu     │
├────┼────┼─────────┼───────┼───────────┤
│ 1  │ 3  │    1    │ xxx   │ yyy       │
└────┴────┴─────────┴───────┴───────────┘

[JacobMGEvans]

👋🏻 Greetings,
I appreciate the report.

Feel free to check out the Cloudflare Discord where there is a channel for D1 as well: https://discord.com/invite/cloudflaredev

Cc: @rozenmd

[rozenmd]

@AndriiSherman could I bother you for a schema/db sql file to reproduce this?

[xdivby0]

@rozenmd Although I am not Andrii, I think I have the same problem and here's a minimal example schema that has the issue (pretty much any schema that you can join where both have one shared field name (here it's "id"):

import type { InferModel } from "drizzle-orm";
import {
  integer, primaryKey,
  sqliteTable,
  text
} from "drizzle-orm/sqlite-core";

export const users = sqliteTable(
  "users",
  {
    id: integer("id").primaryKey({
      autoIncrement: true
    }),
    email: text("email").notNull(),
  }
);

export const subscriptions = sqliteTable(
  "subscriptions",
  {
    id: integer("id").primaryKey({ autoIncrement: true }),
    user: integer("user").notNull().references(() => users.id, {
      onDelete: "cascade"
    })
  }
);

[AndriiSherman]

Agreed. Any SELECT query involving joins and having the same fields in the response will not work as expected.

In our case, we are using the raw mode for querying, but it appears that the raw mode in the "d1" driver differs from the raw mode in other drivers

Link to a code: https://github.com/cloudflare/workers-sdk/blob/main/packages/wrangler/templates/d1-beta-facade.js#L177

After receiving the response in JSON format, it is subsequently mapped to an array of arrays at the code level. Consequently, fields with the same name will be overridden.

[rozenmd]

We've traced this back to workerd, and will be discussing possible solutions here: cloudflare/workerd#696

Keep in mind @AndriiSherman that a temporary fix on Drizzle's side is still possible by using .all() and manipulating the data into the array of arrays format yourselves.

[itsmatteomanf]

Keep in mind @AndriiSherman that a temporary fix on Drizzle's side is still possible by using .all() and manipulating the data into the array of arrays format yourselves.

I’m pretty sure it behaves wrongly even with this option. I’m gonna need to check, but how could it return multiple identical keys in an array of objects?

Normally SQL databases return the table name in the joined table’s column names. Or even in both.

Do you want me to check, even if it’s impossible to return multiple keys of the same name, @rozenmd?

[marina-chibizova]

We have the same problem, does anything block fix for this bug?

[elithrar]

We are working on this. Current priority is larger databases, which is the biggest ask from most users.

[marina-chibizova]

Thanks for a prompt response @elithrar!

[jwhits]

We are working on this. Current priority is larger databases, which is the biggest ask from most users.

Is there any update on resolving this issue? I have tables with the same names for common fields like created_at, updated_at, id etc and joins don't work because all the response data is shifting columns in the results.

[geelen]

FYI, this will be fixed D1 once cloudflare/workerd#1586 is merged and rolls out

It will only fix the results of .raw(), .all() will still have later columns with the same name overwriting earlier ones.

[geelen]

This is now released. .raw() returns the full results set regardless of column name clashes. Sadly Wrangler still uses .all() so this won't be visible except from inside the Worker API, so I'll leave this ticket open for now.

[elithrar]

Changelog: https://developers.cloudflare.com/d1/platform/changelog/#2024-02-13

cc @AndriiSherman on the Drizzle team.

[AndriiSherman]

Changelog: https://developers.cloudflare.com/d1/platform/changelog/#2024-02-13

cc @AndriiSherman on the Drizzle team.

Has it been released already? I would like to run some tests, can't find this version for types on npm

[rozenmd]

@AndriiSherman sorry for the delay there - the types are released in 4.20240222.0

[dankochetov]

@rozenmd I've tested this with latest types version (4.20240320.1), and the .raw() method still doesn't return multiple columns with the same name. This change shouldn't require any actions from our side, since we don't bundle @cloudflare/workers-types with Drizzle, it's used as a peer dependency, so it should be enough for users to just update their dependency version. However, it doesn't seem to be the case.

Here's a reproduction repo: https://github.com/dankochetov/drizzle-d1-bug
I've added a raw D1 call to make sure it wasn't Drizzle's fault, and observed the same behavior. As you could see from the logs, the columns list in the response don't match the columns list in the query.

[geelen]

Hi @dankochetov, that looks like a bug in local mode (probably related to getPlatformProxy(), though I'll need to dig in and figure out exactly what).

The .raw() behaviour has been fixed in production though, I've just converted your repro to actually publish a worker and I get the expected output:

I'll take a look at the local behaviour this week, apologies for the oversight.

[stefanmaric]

has been fixed in production though

@geelen I'm using the latest wrangler 3.37.0 to deploy my app with compatibility_date = "2024-03-25" and I'm still facing this issue.

Is there anything special I need to do to get the new version?

[stefanmaric]

Running my query from the D1 Dashboard console UI or wrangler D1 CLI get me the same, buggy result. It collapses columns with the same name from joined tables into a single one, the last joined table seemingly taking precedence.

SELECT id, A.description, B.description FROM table_a A LEFT JOIN table_b B ON B.id = A.id WHERE id = 'abc'

[F0rce]

Are there any updates on this?