Computed-column planning currently sees Blob v2 storage descriptors, so
expressions cannot consume payload bytes or preserve Blob semantics in
their outputs.
A computed declaration now derives its output field from its expression.
A direct projection of a Blob v2 field inherits the source field's Blob
metadata; other expressions retain their ordinary Arrow-inferred type.
Declarations remain ordered, so the same rule applies across chained
projections.
Refresh materializes referenced Blob inputs as `LargeBinary` payload
bytes and publishes inherited Blob outputs through Lance's Blob
conversion path. Remote requests remain within the shared namespace
contract as `{name, computed}`; the server planner is being updated in
tandem to implement the same Blob-aware planning semantics, and remote
enablement must be aligned with that server rollout.
The existing null-as-unfilled contract remains unchanged. Row-level
freshness and cell flags remain follow-up work.
Xuanwo
0559108fa9