The pageinspect module provides functions that allow you to inspect the contents of database pages at a low level, which is useful for debugging

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

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

The uuid-ossp module provides functions to generate universally unique identifiers (UUIDs) using one of several standard algorithms. There are

The pgrowlocks module provides a function to show row locking information for a specified table.

The tcn module provides a trigger function that notifies listeners of changes to any table on which it is attached. It must be used as an

The pgcrypto module provides cryptographic functions for PostgreSQL.

The tsm_system_time module provides the table sampling method SYSTEM_TIME, which can be used in the

The pgstattuple module provides various functions to obtain tuple-level statistics. F

The sslinfo module provides information about the SSL certificate that the current client provided when connecting to