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

The pg_visibility module provides a means for examining the visibility map (VM) and page-level visibility information. It also provides functions

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 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

The passwordcheck module checks users' passwords whenever they are set with CREATE

The fuzzystrmatch module provides several functions to determine similarities and distance between strings.

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

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