Module arrow 

Available on crate feature arrow only.

Convert rec records into Apache Arrow RecordBatches.

Gated behind the arrow cargo feature. Honors %type: declarations from the rset descriptor; untyped fields fall back to Utf8.

Functions

build_column

build_columns

build_schema

collect_rows

collect_rows_from_rset

format_arrow_value

map_arrow_to_rec_type

Inverse of map_rec_type. Returns Ok(None) for Utf8, since rec’s untyped default is string and emitting %type: <name> string would be noise. Returns Err for Arrow types we don’t know how to round-trip.

map_rec_type

parse_rec_bool

rec_to_filtered_batch

Build a RecordBatch for the records of record_type that match the given selection expression, using the caller-provided schema (so the column set stays stable even when the filter excludes every record that has a particular field).

rec_to_filtered_batch_from_rset

Same as rec_to_filtered_batch but for an arbitrary Rset.

rec_to_record_batch

rec_to_record_batch_from_rset

Build the (schema, batch) for an arbitrary Rset, including anonymous record sets that have no %rec: descriptor (so they can’t be looked up by Db::rset_by_type).

record_batches_to_rec_string

Serialize batches as a .rec file body containing a single record set of type record_type. The descriptor block carries %rec:, one %type: line per non-Utf8 column, and one %mandatory: line per non-nullable Arrow field. Null values are omitted from the produced records (rec convention: absent field == null).

split_type_decl