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Tom Lane 6e2f3ae884 Support LIKE and ILIKE index searches via contrib/pg_trgm indexes. ... Unlike Btree-based LIKE optimization, this works for non-left-anchored search patterns. The effectiveness of the search depends on how many trigrams can be extracted from the pattern. (The worst case, with no trigrams, degrades to a full-table scan, so this isn't a panacea. But it can be very useful.) Alexander Korotkov, reviewed by Jan Urbanski		15 years ago
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pg_trgm.sql	Support LIKE and ILIKE index searches via contrib/pg_trgm indexes.	15 years ago