64.5. Examples

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”