Editions: gate extension dtypes and support crate-declared families (json)
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评估
调研方向
Start with the edition catalog and VortexWriter.create, then compare the current encoding-only guard with the extension-dtype behavior described in vortex-json/src/editions.rs. Update docs/compatibility.md, ADR 0023, and CLAUDE.md alongside the implementation, including the decision about whether EditionFamily stays closed. Done means schemas with disabled extension dtypes are rejected, the json family and vortex.json behavior are covered, and the built-in JSON decoder rejects non-UTF-8 data.
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描述
Rust editions gate extension dtypes as well as encodings, and edition families are no longer a fixed set: optional crates declare their own. vortex-java models neither.
Rust behavior
- An edition lists its members by component kind, and an extension dtype is one of those kinds (
EditionMember::dtype(..)). A writer with an edition policy may emit only members of enabled families, so a schema with an extension dtype outside them is refused. - Families are declared per crate.
vortex-json/src/editions.rsdeclares thejsonfamily (originvortex-json) with one draft edition,json2026.08.0, adding thevortex.jsondtype.vortex_json::initialize(session)registers the dtype and enables the family together. Being outsidecorereflects that a reader built withoutvortex-jsoncannot resolvevortex.json.
vortex-java today
- The edition guard (
WriteOptions#editions(), ADR 0023) checks array encodings only, sowithEdition(..)lets a schema carryvortex.jsonor any custom extension id (now easy to register, #530/#547).docs/compatibility.mdalready notes the catalog models encodings only. EditionFamilyis a closed enum (CORE/PREVIEW/ZSTD), and CLAUDE.md justifies this because a private family carries no real guarantee. Rust now has crate-declared families (json), so the enum is missing one, and the closed-world rationale no longer matches the reference.
To decide
- Extend the
Editionscatalog with extension-dtype members and enforce them in the writer's edition guard atVortexWriter.create. - Model
json(and decide between keepingEditionFamilyclosed with known Rust families added, and opening it the way Rust does). Update ADR 0023 / CLAUDE.md accordingly. - Related: a built-in
vortex.jsonExtensionDecoder<String>(UTF-8 storage,validaterejecting non-Utf8), so JSON files open withoutallowUnknown()after #547.
Refs #530
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