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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 |
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.. | ||
data | ||
expected | ||
sql | ||
.gitignore | ||
Makefile | ||
pg_trgm.sql.in | ||
trgm_gin.c | ||
trgm_gist.c | ||
trgm_op.c | ||
trgm.h | ||
uninstall_pg_trgm.sql |