0.3.0

A performance-focused release: reading and iterating a validated Column now skips arrow's per-element bounds checks, plus a new record-batch constructor.

⚠️ Breaking changes

• Replace the implicit by-value IntoIterator for Column with an explicit .into_iter_owned() (#16)

New features

• Add Column::from_record_batch_and_name (#13)

Performance

• Skip per-element bounds checks when iterating Column/ListValue (#15)
• Unchecked reads for AnyList, an unchecked null probe for Option, and #[inline] on the per-element accessors (#17)

Other improvements

• Add benchmarks (#14)

Full diff: https://github.com/rerun-io/quiver/compare/0.2.0..0.3.0

0.2.0

Full diff at https://github.com/rerun-io/quiver/compare/0.1.1..0.2.0

This release adds a family of new logical types, "any-encoding" types that abstract over the multiple arrow encodings of the same logical value, and support for arrow 59.

⚠️ Breaking changes

• Replace Column<String> with Utf8/LargeUtf8/Utf8View markers #5 by @emilk

New logical types

• Add four arrow logical types: BinaryView, LargeList, Map, Run #6 by @emilk
• Add ListView and LargeListView logical types #7 by @emilk
• Add AnyList<L>: one logical type for any list encoding #8 by @emilk
• Add AnyBinary: one logical type for any binary encoding #9 by @emilk
• Add AnyUtf8: one logical type for any UTF-8 encoding #10 by @emilk

Other improvements

• Give ListValue a Column-like read API #11 by @emilk
• Add support for arrow 59 #12 by @emilk

0.1.1

Full diff: https://github.com/rerun-io/quiver/compare/0.1.0..0.1.1

PRs

• Expose the datatype-matching hook: Datatype::matches #1 by @emilk
• Bulk zero-copy as_slice() for fixed-size binary columns #2 by @emilk
• Fix CI: cargo-deny wildcard policy + redundant doc link #4 by @emilk

0.1.0 - Initial release

A zero-copy, strongly typed interface for Apache Arrow columns and record batches, for Rust's arrow-rs.

Highlights:

• Column<L>: a strongly-typed, validated, zero-copy view of one record batch column,
  where L is a logical type like String, Option<i64>, or List<Option<String>>
• One eager, cheap validation at the parse boundary; after that,
  element access is infallible, fully typed, and zero-copy
• Logical types for primitives, f16, strings, binaries, timestamps, durations,
  dates, times, lists, fixed-size lists, fixed-size binaries, and dictionaries
• #[derive(Quiver)]: convert a struct of columns to and from arrow RecordBatches,
  mixing strongly-typed Column<L> fields with raw arrow arrays
• COLUMN_* descriptor constants for single-column extraction without hard-coding names
• Per-column metadata, declared (#[quiver(metadata("key" = "value"))]) or per-instance
• newtype_datatype! for domain newtypes, and the As adapter for foreign types

Published crates: quiver, quiver_types, quiver_derive