• Browse categories
• PostgreSQL releases
  • PostgreSQL 15 (beta1)
  • PostgreSQL 14 (latest)
  • PostgreSQL 13
  • PostgreSQL 12
  • PostgreSQL 11
  • PostgreSQL 10
  • PostgreSQL 9.6 (EOL)

Version charts

Useful overviews

Useful links

GIN (Generalized Inverted Index)

GIN (Generalized Inverted Index) is an index type which supports more complex data types than the usual key/value relationships supported by e.g. btree indexes. Common applications for GIN include indexing array values and full text search.

GIN index support was introduced in PostgreSQL 8.2.

Change history

• PostgreSQL 13
  • avoid full scan of GIN indexes when possible (commit 4b754d6c)
  • GIN indexes can more efficiently handle ! (NOT) clauses in tsquery searches (commit 4b754d6c)
• PostgreSQL 12
  • WAL write overhead of GIN index creation reduced (commit 9155580f)
  • GIN support for @@ and @? jsonpath operators added (commit 0a02e2ae)
• PostgreSQL 11
  • predicate locking added (commit 43d1ed60)
• PostgreSQL 10
  • page locking during vacuum operations reduced (commit 218f5158)
• PostgreSQL 9.6
  • maintenance_work_mem values of more than 1GB can be used for GIN index builds (commit 30bb26b5)
  • pages deleted from a GIN index's pending list to the free space map immediately (commits e9568083 and dc943ad9)
  • function gin_clean_pending_list() added (commit 7f46eaf0)
• PostgreSQL 9.5
  • gin_pending_list_limit configuration parameter added (commit a1b395b6)
  • following functions for inspecting GIN indexes added to pageinspect (commit 3a82bc6f):
    • gin_metapage_info()
    • gin_page_opaque_info()
    • gin_leafpage_items()
• PostgreSQL 9.4
  • index size reduced through compression of GIN posting lists (commit 36a35c55)
  • speed of multi-key lookups improved (commits e20c70cb, 25b1dafa and 626a1206)
  • improved search speed where one item is rare and the other is frequent (commit dbc649fd)
• PostgreSQL 9.3
  • function pgstatginindex() added to pgstattuple (commit 357cbaae)
• PostgreSQL 9.1
  • recognition of duplicate search entries improved (commit 56a57473)
  • support for indexing NULL anrd empty values added (commit 73912e7f)
  • index scan cost estimation improved (commit 48c7d9f6)
• PostgreSQL 9.0
  • use red-black binary trees for index creation (commit 5209c084)
• PostgreSQL 8.4
  • support for partial-match searches added (commit e6dbcb72)
  • index operator lossiness determination pushed down to GIN opclass functions (commit 9b5c8d45)
  • search tree depth limit for GIN bulk-insert operations added (commit e5efda44)
  • "fastupdate" support added (commit ff301d6e)
  • multi-column support added (commit 27cb66fd)
• PostgreSQL 8.3
  • GIN index support added to hstore (commit 754148d8)
  • GIN index support added to pg_trgm (commit 15f91f27)
  • extractQuery() method can signal that nothing can satisfy the query (commit d4c6da15)
• PostgreSQL 8.2
  • added (commit 8a3631f8)

References

Useful links

Categories

See also