The PostgreSQL™ source distribution includes
GIN operator classes for tsvector and
for one-dimensional arrays of all internal types. Prefix searching in
tsvector is implemented using the GIN partial match
feature.
The following contrib
modules also contain
GIN operator classes:
btree_gin
B-tree equivalent functionality for several data types
hstore
Module for storing (key, value) pairs
intarray
Enhanced support for int[]
pg_trgm
Text similarity using trigram matching