Kysely•9mo ago

How can I get total row count without blowing up types?

I have a simple query function that is in charge of generating a list of ids so that it can be passed into a function which does some other fancy stuff with those ids as a CTE. Like so:

export async function getByExternalId(
  db: Kysely<DB>,
  partner: string,
  externalId: string,
) {
  return getWithDataByIds(db, db => db.selectFrom('some_table')
    .innerJoin('some_other_table', 'some_table.provider_id', 'some_other_table.provider_id')
    .select('some_id')
    .where('external_id', '=', externalId)
    .where('name', '=', partner));
}

export async function getByExternalId(
  db: Kysely<DB>,
  partner: string,
  externalId: string,
) {
  return getWithDataByIds(db, db => db.selectFrom('some_table')
    .innerJoin('some_other_table', 'some_table.provider_id', 'some_other_table.provider_id')
    .select('some_id')
    .where('external_id', '=', externalId)
    .where('name', '=', partner));
}

Now, the problem is I also want to get the total row count with COUNT(*) OVER() so that I don't have to make two trips. But if I try to add sql to the select list to get that value, the type system loses its mind... Can I somehow cast the sqlCOUNT(*) OVER() to behave as if the query is going to return a column with the name total and make it not worry about how?

Solution:

I guess maybe this works?

.select(['some_id', (eb) => eb.fn.count('some_id').over().as('total')])

.select(['some_id', (eb) => eb.fn.count('some_id').over().as('total')])

...

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1 Reply

Solution

djMax•9mo ago

I guess maybe this works?

.select(['some_id', (eb) => eb.fn.count('some_id').over().as('total')])

.select(['some_id', (eb) => eb.fn.count('some_id').over().as('total')])

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How can I get total row count without blowing up types?