The file_fdw module provides the foreign-data wrapper file_fdw, which can be used to access data files in the server's

NameCREATE TRIGGER -- define a new trigger Synopsis

NameDROP ROLE -- remove a database role Synopsis

Namepgbench -- run a benchmark test on PostgreSQL

NameANALYZE -- collect statistics about a database Synopsis

The core PostgreSQL distribution includes the SP-GiST operator classes shown in Table 62-1.

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

NameALTER TYPE -- change the definition of a type Synopsis

Object identifiers (OIDs) are used internally by PostgreSQL as primary keys for various system tables. OIDs are not added to user-created tables

The usual logical operators are available: AND OR