The earthdistance module provides two different approaches to calculating great circle distances on the surface of the Earth. The one described

This module implements the hstore data type for storing sets of key/value pairs within a single PostgreSQL value

dict_int is an example of an add-on dictionary template for full-text search. The motivation for this example dictionary is to control the indexing

The tsm_system_rows module provides the table sampling method SYSTEM_ROWS, which can be used in the

Table C-1 lists all tokens that are key words in the SQL standard and in PostgreSQL 9.6.0. Background information can be found in Section 4

The xml2 module provides XPath querying and XSLT functionality. F.46.1. Deprecation

The pg_visibility module provides a means for examining the visibility map (VM) and page-level visibility information. It also provides functions

unaccent is a text search dictionary that removes accents (diacritic signs) from lexemes. It's a filtering dictionary, which means its output

The pg_buffercache module provides a means for examining what's happening in the shared buffer cache in real time. The

The tsearch2 module provides backwards-compatible text search functionality for applications that used tsearch2