Wyatt Alt e40e073a9d feat(rust): fill computed columns with refresh_column ...

Declaring a computed column stores its expression but computes nothing, so
until now the column stayed null with no way to fill it. refresh_column
evaluates the expression over the rows that still hold no value and commits the
results:

    table.refresh_column("doubled").await?

Rows without a value are the ones to fill, which also makes the operation
idempotent and resumable after a failure: refreshing again picks up whatever
did not land. A row whose expression evaluates to null is indistinguishable
from an unfilled one and is recomputed, which costs work but cannot change the
result.

Values written after a refresh are reachable by the next one, which is the case
that matters -- an expression column populated once and then appended to would
otherwise read null for every later row forever.

2026-08-12 18:48:48 -07:00

..

lancedb

feat(rust): fill computed columns with refresh_column

2026-08-12 18:48:48 -07:00

license_header.txt

ci: check license headers (#2076)

2025-01-29 08:27:07 -08:00