pub fn build_arrow_field(mapping: &TypeMapping) -> Option<Field>Expand description
Build an arrow::Field from a TypeMapping, attaching the standard
metadata keys ([META_NATIVE_TYPE], [META_LOGICAL_TYPE],
[META_FIDELITY]).
Returns None if the mapping has no resolved Arrow type (i.e. the
RivetType is Unsupported and no policy has rewritten it). Callers
must surface this as a type-policy decision, not as a panic.