Erik JohnstonandClaude Opus 4.8 c90e034299 Decode Postgres array columns to Python lists in the Rust value mapping ...

The value mapping bound arrays as parameters (a `list` → `Array`) but couldn't
decode an array *column* back out — the decode side assumed "Synapse only binds
arrays as parameters". That assumption was wrong: the caches replication stream
reads `keys` (a `text[]`) via `get_all_updated_caches`, so decoding failed with
"error deserializing column", the stream read errored, and a worker never
received bulk cache invalidations (the `wait_for_stream_position` in the test
hung and never fired).

Decode an array column into a Python `list`, each element decoded by the array's
element type (via `array_from_sql`); `PythonPgFromSql::accepts` now also accepts
arrays of a supported scalar element type, mirroring `PgValue`'s `ToSql`. The
Rust-native `DbValue` decoder stays scalar-only — nothing reads array columns
through it. Adds `fallible-iterator` (the version postgres-protocol already
uses) to iterate the decoded array's elements.

Fixes tests.storage.databases.main.test_cache.CacheInvalidationOverReplication's
test_bulk_invalidation_replicates on the Rust backend.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01W3G4M92AmwSSZCbmtMJU3d

2026-07-06 10:14:31 +00:00

..

benches

Implement the push rules for experimental MSC4306: Thread Subscriptions. (#18762)

2025-08-06 15:33:52 +01:00

src

Decode Postgres array columns to Python lists in the Rust value mapping

2026-07-06 10:14:31 +00:00

build.rs

resolves #19403 Report the rust compiler version used in the prometheus metrics (#19643)

2026-04-03 11:21:23 +02:00

Cargo.toml

Decode Postgres array columns to Python lists in the Rust value mapping

2026-07-06 10:14:31 +00:00