cucadmuh 6168e81195 fix(library): use partial indexes for §6.9 remap lookup (#1105) ...

* fix(library): use partial indexes for §6.9 remap lookup

The delta-sync remap detection ran a single lookup with an OR across
content_hash and server_path. SQLite could not use the partial
idx_track_remap_hash / idx_track_remap_path indexes for it: a partial
index is only applied when the query's WHERE provably implies the index
predicate (… != ''), and an OR spanning two columns blocks the per-branch
index plan. The query degraded to a full track scan on every incoming
row → O(rows × catalog), causing multi-minute stalls on large libraries
(observed upsert_batch_remap exec_ms=162001 on a ~200k-track Navidrome
sync, which in turn blocked all other writers on the single write mutex).

Split it into two single-column lookups that each repeat the index
predicate so the planner picks the matching partial index (SEARCH, not
SCAN); hash is checked first, matching §6.9 strong-key priority. Adds an
EXPLAIN QUERY PLAN regression test asserting index usage.

* docs(changelog): note remap-lookup sync stall fix (PR #1105)

(cherry picked from commit bca0acbaff)

2026-06-17 01:30:23 +03:00

..

migrations

fix(library): multi-genre local index with track_genre and backfill (#1059)

2026-06-11 01:02:35 +03:00

src

fix(library): use partial indexes for §6.9 remap lookup (#1105)

2026-06-17 01:30:23 +03:00

Cargo.toml

feat(offline): unify local playback, offline library, and favorites sync (#1008)

2026-06-06 22:43:03 +03:00