Module legacy 

Legacy Arrow schema detection and conversion to current Rust schemas.

Structs

LegacySchemaResolution

Preflight schema resolution for a source file.

LegacyTranscodeResult

Record batches resolved to a current Rust Arrow schema.

LegacyTranscodeState

File-scoped state for legacy Arrow transcoding.

SchemaFingerprint

Stable identity for Arrow field names, types, and nullability.

Enums

LegacyArrowError

Failure to resolve or convert a legacy Arrow schema.

LegacyTranscodeKind

Registry decision applied to a source batch.

Functions

is_legacy_enum_field

Returns whether name identifies a legacy catalog enum field.

is_nautilus_legacy_schema

Returns whether a schema is a recognized Nautilus legacy family.

is_nautilus_timestamp_schema

Returns whether timestamp annotations belong to a recognized Nautilus schema.

is_timestamp_field

Returns whether name identifies a legacy catalog timestamp field.

normalize_legacy_fixed_columns

Normalizes legacy fixed-point byte columns to the open decimal representation.

normalized_legacy_data_type

Returns the open Arrow type for a recognized legacy catalog field.

normalized_timestamp_type

Adds the UTC annotation to a nanosecond instant without a timezone.

resolve_legacy_schema

Resolves a normalized source schema without decoding its record batches.

schema_fingerprint

Returns a schema fingerprint that excludes schema metadata.

transcode_legacy_record_batch

Resolves a normalized source batch through the legacy schema registry.

transcode_legacy_record_batch_with_state

Resolves a normalized source batch through the legacy schema registry with file-scoped state.