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Will Jones 09b1bbc12a refactor!: drop unused loss field from IndexStatistics (#3496 )

BREAKING CHANGE: direct Rust users lose the `IndexStatistics::loss`
field. Python and Node.js consumers are unaffected in practice for
remote tables (the value was always `None`/absent), but the attribute is
gone for local tables too.

`IndexStatistics::loss` was local-only — LanceDB Cloud never returned
it, so
`RemoteTable::index_stats` always set `loss: None`. It's vestigial; this
removes it.

- Remove `loss` from `IndexStatistics` and the internal `IndexMetadata`
in `rust/lancedb/src/index.rs`, plus the summing logic in
`NativeTable::index_stats`.
- Drop `loss` from the Python and Node.js bindings (and their
tests/docs).

Fixes #3493

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

2026-06-05 07:52:40 -07:00

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@lancedb/lancedb • Docs

@lancedb/lancedb / IndexStatistics

Interface: IndexStatistics

Properties

distanceType?

optional distanceType: string;

The type of the distance function used by the index. This is only present for vector indices. Scalar and full text search indices do not have a distance function.

indexType

indexType: string;

The type of the index

numIndexedRows

numIndexedRows: number;

The number of rows indexed by the index

numIndices?

optional numIndices: number;

The number of parts this index is split into.

numUnindexedRows

numUnindexedRows: number;

The number of rows not indexed

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