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.
The dense fold deleted Google Health and Oura samples outright, on the
reasoning that no client pulls them. The change feed serves every
source, so a client mirroring it kept those samples next to the hourly
means with nothing to tell it they were gone.
The nightly increment of a server-pulled source is tombstoned again: the
feed reports each sample and the tombstone cleanup purges them after the
retention. A backlog day, such as an account's first fold, is still
deleted outright, and the account's delta cursors expire instead, since
tombstoning millions of rows would undo the point of the fold. The
compaction-tombstone class leaves these sources out, so the feed, the
backlog purge and the restore treat their tombstones like any deletion.
Apple Health and Health Connect are unchanged.
The dense hourly fold only took Apple Health and Health Connect samples,
so heart rate from the provider syncs that store one row per sample
stayed raw forever. One self-hosted account held about 25 million
Google Health pulse rows after a full-history backfill, and every
reader and fold that falls back to the raw table paid for it (#1297).
The fold now walks a map of sources to the dense types each stores
sample by sample: every dense type for Apple Health and Health Connect,
heart rate for Google Health and Oura. Their daily SpO2 values are no
intraday stream and stay as they are; Fitbit does not sync intraday
heart rate, and WHOOP, Withings and Polar write dense types only once
per recovery, night or spot check. Each source folds into its own
hourly stats rows, and the DAY rollup is still taken from the raw
samples before they go.
The fold deletes the samples it averages, and the provider syncs write
first-write-wins on the externalId, so a backfill or full sync would
have put every folded sample back. Google Health would even have
re-keyed an hourly row into a sample that fell on its anchor through
the natural-key rescue. The folded_window rule now has one hour rule
per fold source, and both syncs drop the samples of an hour the fold
already took before they write. Recent samples cost no lookup.
The boot discovery of the fold probes each account and source for the
first raw sample it would take instead of grouping every such row, and
the one-time fold repair stays on the two sources it was written for.
Marc-André Bombeck