ensureDbCompatibility ran ALTER TABLE / CREATE TABLE IF NOT EXISTS on the
login, register, token and session paths, mirroring columns every
migration under prisma/migrations already creates. The entrypoint applies
those migrations before the server listens and stops the boot when one
fails, so the mirror never had work to do, and DDL on a request path
needs the table's owner: a connection that may only read and write rows
fails every login on it. Drop the module, its call sites and the mocks
that stubbed it out.
A manual full sync re-reads the whole history, and nearly all of it is
already stored. Each reading cost a findFirst plus an update, and every
re-read day was marked dirty, so the run refolded the DAY tier and queued
three coarse recomputes for every day of the account: about thirty
seconds of database work behind 1.4 s of Withings calls.
The measures leg now reads the stored rows of the window once, skips the
unchanged ones, updates the changed or tombstoned ones and inserts the
new ones in batches. Only inserted or changed readings count as touched.
recomputeBucketsForKeys refolds exactly the touched DAY buckets in one
aggregate and one transaction, and queues one coarse job per run of
adjacent buckets instead of three per day.
Marc-André Bombeck