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

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

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

auth_delay causes the server to pause briefly before reporting authentication failure, to make brute-force attacks on database passwords more

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

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

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

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

The auto_explain module provides a means for logging execution plans of slow statements automatically, without having to run

bloom provides an index access method based on Bloom filters