query.nearest_unindexed: Nearest-neighbour order on a vector with no fixed length

Nearest-neighbour order on a vector with no fixed length.

Area 21, AI; not declinable; the next step is usually the agent's.

nearest on a vector field whose type has no dimensions:: a plain Vector, or an Embedding, which keeps its vector without a length. pgvector builds an HNSW index only on a column of fixed length.

example

/// A reply an agent is still writing, with its meaning as a model made it.entity DraftReply {    id: Uuid    reply_meaning: Vector}/// The five replies nearest one being written.query similar_drafts(reply_meaning: Vector) -> List<Nearest<DraftReply>> {    from: DraftReply    order: [DraftReply.reply_meaning nearest reply_meaning]    limit: 5}

jadpo checkcheck failed: 1 error, 1 file

error DraftReply.reply_meaning has no fixed length, so no index can order it by nearness

--> main.jadpo:10:13

   |10 |     order: [DraftReply.reply_meaning nearest reply_meaning]   |             ^^^^^^^^^^^^^^^^^^^^^^^^ a `Vector` without `dimensions:`

reason: A nearest-neighbour query reads an HNSW index, which pgvector builds only on a vector column of fixed length, and DraftReply.reply_meaning is a Vector, kept without one.
next: Give DraftReply.reply_meaning a type built on Vector with the model's dimensions: (agent)
rule: query.nearest_unindexed
help: https://jadpo.dev/docs/errors/query.nearest_unindexed