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docs: document Rust blob v2 column helper#278

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docs: document Rust blob v2 column helper#278
mintlify[bot] wants to merge 1 commit into
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mintlify/49405260

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@mintlify mintlify Bot commented Jun 19, 2026

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Summary

Document the new Rust helper for declaring Lance blob v2 columns, exposed by the latest LanceDB Rust SDK.

Changes

  • Extend the multimodal data guide with a Rust-specific subsection covering the new blob v2 column helper, including a minimal write-path example.
  • Note that the helper auto-bumps the table's Lance file format to >= 2.2 and pairs with stable row ids.
  • Call out that read/materialize support and Python/TypeScript equivalents are planned follow-ups.

Context

The Rust SDK now ships a convenience function that builds an Arrow field with the lance.blob.v2 extension marker and the struct layout Lance expects on write. Users previously had to set the lance-encoding:blob metadata by hand to opt into blob-encoded storage; the new helper makes the blob v2 schema declaration explicit and ensures the table is created with a compatible storage format.

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