The PostgreSQL source distribution includes several examples of index methods implemented using GiST. The core system currently provides text search support (indexing for tsvector
and tsquery
) as well as R-Tree equivalent functionality for some of the built-in geometric data types (see src/backend/access/gist/gistproc.c
). The following contrib
modules also contain GiST operator classes:
btree_gist
B-tree equivalent functionality for several data types
cube
Indexing for multidimensional cubes
hstore
Module for storing (key, value) pairs
intarray
RD-Tree for one-dimensional array of int4 values
ltree
Indexing for tree-like structures
pg_trgm
Text similarity using trigram matching
seg
Indexing for “float ranges”