Update statements with joins don't seem to work

Hello! Just switched from Prisma and loving the library so far. Just ran into an issue where I’m hoping there’s a workaround or I’m doing something wrong.

Basically, I have an existing MySQL statement that reads:

update OverallMV O join OverallMV O2 on O.Rank = O2.Rank and O.UserID <> O2.UserID set O.Tied = true

So I recreated it in Kysely as:

await trx.updateTable("OverallMV as O").innerJoin(
      "OverallMV as O2",
      (join) =>
        join
          .onRef("O.Rank", "=", "O2.Rank")
          .onRef("O.UserID", "<>", "O2.UserID"),
    ).set({ Tied: 1 }).execute();

However, this fails with a ER_PARSE_ERROR since it puts the set before the join:

update `OverallMV` as `O` set `Tied` = 1 inner join `OverallMV` as `O2` on `O`.`Rank` = `O2`.`Rank` and `O`.`UserID` <> `O2`.`UserID`

Any ideas here?

Side note, I’m wondering if this use case was never tested as I would also expect to choose which table to update in the set. So more like .set({ "O.Tied": 1 }), which does not currently work but .set({ Tied: 1 }) does.

[koskimas]

That wouldn’t work with the types. Correct me if I’m wrong, but on MySQL you can update all joined tables? So we would need to append to UT of UpdateQueryBuilder<DB, UT, TB, O> in “before from joins” and to TB in “after from joins”. We’d need to add a new type argument just to indicate if from has been called.

[koskimas]

I think what @igalklebanov suggested regarding WITH is this:

trx
  .with('someGoodName', (qb) => qb
    .selectFrom("OverallMV as O")
    .innerJoin("OverallMV as O2", (join) => join
      .onRef("O.Rank", "=", "O2.Rank")
      .onRef("O.UserID", "<>", "O2.UserID")
    )
    .select('ID')
  )
  .updateTable("OverallMV")
  .whereExists((eb) => eb.selectFrom("someGoodName").select("ID"))
  .set({ Tied: 1 })