bvandeusen
7cfaafd360
Closes the last deferred follow-up from #357. The library_changes table is the append-only change log that drives /api/library/sync's delta semantics — every mutation (scanner upsert, like, playlist edit, track delete) writes one row. Without a retention policy the table grows unbounded; the original migration (0025) called out the follow-up explicitly. New goroutine: sync.Compactor runs daily, deletes rows where changed_at < now - 30 days. Logs a row count when non-zero so operators can see compaction activity in the journal. First tick fires on startup so a process that hasn't been compacted in a while catches up immediately. 30-day retention matches the offline-mode spec (docs/superpowers/specs/2026-05-09-flutter-offline-mode-design.md). Clients with a cursor older than that hit the existing 410 fallback path and resync from scratch. Imported as syncpkg in main.go to follow the existing convention (see internal/library/scanner.go). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
23 lines
756 B
SQL
23 lines
756 B
SQL
-- name: InsertLibraryChange :exec
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INSERT INTO library_changes (entity_type, entity_id, op)
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VALUES ($1, $2, $3);
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-- name: GetLibraryChangesSince :many
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SELECT id, entity_type, entity_id, op, changed_at
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FROM library_changes
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WHERE id > $1
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ORDER BY id ASC
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LIMIT $2;
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-- name: GetMaxLibraryChangeCursor :one
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SELECT COALESCE(MAX(id), 0)::BIGINT FROM library_changes;
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-- name: GetMinLibraryChangeCursor :one
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SELECT COALESCE(MIN(id), 0)::BIGINT FROM library_changes;
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-- name: DeleteOldLibraryChanges :execrows
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-- Removes library_changes rows older than the given cutoff. Run from
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-- the sync compactor goroutine on a daily tick. Returns the number of
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-- rows deleted so the worker can log meaningful progress.
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DELETE FROM library_changes WHERE changed_at < $1;
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