Files
lancedb/docs/web/curation
Xuanwo ad70597435 feat(python): expose Function batch size and row timeout controls (#4807)
Python UDF registration could not set `batch_size` or
`row_timeout_seconds`, and the Rust registration model discarded these
fields before submitting SQL. Expose both optional controls and preserve
them through registration, with invalid values rejected and unchanged
canonical bytes when the controls are omitted.

The timeout applies to each Python call: one row for scalar Functions
and one batch for vectorized Functions. Initialization keeps its
existing service deadline.

Validation at `f58e55c535a7df310db14d691b329402ca4baaf5`: 6 Rust
registration-contract tests, 2 outbound-SQL tests, and all 103 Python
slice2 tests passed after rebuilding the native extension. Rust
formatting and the repository Python CI checks (Ruff 0.9.9, python/
scope) passed. A real REST + Flight SQL server integration also passed
using the rebuilt SDK: `batch_size=2` limits observed calls in a direct
SELECT over 8 rows, initial materialized-view creation, and
append/refresh to 12 rows. This CPU host test verifies SDK-to-runtime
passthrough; it does not exercise GPU initialization.

Refs ENT-3246. The original GPU initialization and video-decoding
scenario still needs verification on a current deployment; this SDK
change does not close that investigation.

The additional repository-root style checks report existing
docs/web-tests findings (nine format files and 48 lint diagnostics); all
affected files are unchanged from main. These are outside the Python CI
job scope.

Rust compatibility: callers constructing `FunctionRegistrationRequest`
must initialize the two new optional fields (`None` preserves defaults);
the request no longer implements `Eq`.

The final head `798f463c9f68ab73e28c9a1ff06b5e4ee3e5d01f` adds
creation-guide documentation and integrates main’s namespace
repr/optional OCI embedding changes. The Function registration
implementation is unchanged. All 103 Python slice2 tests passed again on
EC2 using the unchanged native extension; Rust and server-bridge
evidence remains applicable.
2026-11-03 16:38:22 +08:00
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