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feat: Support get non-zero indices for inverted index #10

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VoVAllen opened this issue Jun 4, 2024 · 0 comments

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VoVAllen commented Jun 4, 2024 •

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An simple solution for BM25 indexing is to get all intersected documents through inverted index and than calculate score in a brute force way.

CREATE INDEX on document USING GIN(to_voc_ids(sparsevec) gin__int_ops)

# Then utilize GIN index to query
SELECT pid FROM documents WHERE to_voc_ids(documents.embedding) && to_voc_ids(queries.embedding)
    ORDER BY queries.embedding <#> documents.embedding LIMIT 1

Probably should skip stop word index in to_voc_ids

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