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

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

bloom provides an index access method based on Bloom filters

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

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

The intarray module provides a number of useful functions and operators for manipulating null-free arrays of integers. There is also support for

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

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

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

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