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

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

This module implements a data type chkpass that is designed for storing encrypted passwords. Each password is automatically converted to encrypted

The SQL standard states that "Within the definition of a 'datetime literal', the 'datetime values'

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

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 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

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