Module arrow_util 

Arrow IPC <-> JSON row helpers, shared by the embedded SQL surface ([Database::sql] / sql_arrow / sql_rows) and the optional remote HTTP client. Kept here (rather than inside remote.rs) so the default embedded build — which has no HTTP dependency — can still decode the Arrow IPC bytes that MongrelSession::run produces.

Functions

batch_to_rows

Materialize one RecordBatch into JSON-row maps (column name → value).

batches_to_ipc

Encode RecordBatches as Arrow IPC file bytes — the wire format the daemon and the NAPI addon both produce. Mirrors the node addon’s native_cols_to_ipc_from_batches.

batches_to_rows

Flatten a slice of batches into a single list of JSON-row maps.

read_arrow_ipc

Decode Arrow IPC file bytes (the format MongrelSession and the daemon both emit) into RecordBatches. An empty input yields an empty vec.