docs: document FM-Index scalar index for substring search#269
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jackye1995
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Jun 10, 2026
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Summary
Documents the new
FMscalar index that acceleratescontains(col, 'needle')substring queries over string and binary columns.Changes
FMto the scalar index list and the "Choosing the Right Index Type" table indocs/indexing/scalar-index.mdx.create_indexexamples in Python, TypeScript, and Rust.Context
Triggered by lancedb/lancedb#3532, which added the FM-Index across the Rust core and the Python (
lancedb.index.Fm) and TypeScript (Index.fm()) bindings.