AlloyDB now supports Best Matching 25 (BM25) indexes for full-text search in

## Feature Feature AlloyDB now supports Best Matching 25 (BM25) indexes for full-text search in[Preview](https://cloud.google.com/products#product-launch-stages). You can use the `pg_textsearch` extension to create BM25 indexes and optimize probabilistic ranking of full-text search. This feature is supported on AlloyDB instances running PostgreSQL 17 or 18. For more information, see [Create and manage a BM25 index](https://cloud.google.com/alloydb/docs/ai/create-bm25-index).