The pg_trgm module provides functions and operators for determining the similarity of alphanumeric text based on trigram matching, as well as

The lo module provides support for managing Large Objects (also called LOs or BLOBs). This includes a data type lo and

The tablefunc module includes various functions that return tables (that is, multiple rows). These functions are useful both in their own right

The pg_freespacemap module provides a means for examining the free space map (FSM). It provides a function called pg_freespace

The pg_stat_statements module provides a means for tracking execution statistics of all SQL statements executed by a server. The

The spi module provides several workable examples of using SPI and triggers. While these functions are of some value in their own right, they

The isn module provides data types for the following international product numbering standards: EAN13, UPC, ISBN (books), ISMN (music), and ISSN

The postgres_fdw module provides the foreign-data wrapper postgres_fdw, which can be used to access data stored in

The citext module provides a case-insensitive character string type, citext. Essentially, it internally calls

This module implements a data type ltree for representing labels of data stored in a hierarchical tree-like structure. Extensive facilities for searching