-- Search upgrade: trigram-based fuzzy matching + brand/country filters.
-- pg_trgm and the product.name GIN index already exist (see 0001). Add a
-- matching trigram index on brand.name so brand filtering / fuzzy brand
-- lookups can use an index instead of a sequential scan.
CREATE INDEX IF NOT EXISTS idx_brand_name_trgm ON brand USING gin (name gin_trgm_ops);

-- country_of_origin is filtered by exact/prefix match; a plain btree index
-- keeps that cheap as the catalog grows.
CREATE INDEX IF NOT EXISTS idx_product_country ON product (country_of_origin);