Postgre SQL PostgreSQL

postgres=#
postgres=# --Displays all functions in the connected database, with comments.
postgres=# \df+
                                                                                                                                                                                        List of functions
   Schema   |                Name                |      Result data type       |                                                Argument data types                                                 |  Owner   | Language |
                                                                                                                                                                                                                                                       Source code
                                                                                                                                                                                                                                                                                               |
                               Description
------------+------------------------------------+-----------------------------+--------------------------------------------------------------------------------------------------------------------+----------+----------+---------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+------------
--------------------------------------------------------------------------------------
 pg_catalog | RI_FKey_cascade_del                | "trigger"                   |                                                                                                                    | postgres | internal | RI_FKey_cascade_del
                                                                                                                                                                                                                                                                                               | referential
 integrity ON DELETE CASCADE
 pg_catalog | RI_FKey_cascade_upd                | "trigger"                   |                                                                                                                    | postgres | internal | RI_FKey_cascade_upd
                                                                                                                                                                                                                                                                                               | referential
 integrity ON UPDATE CASCADE
 pg_catalog | RI_FKey_check_ins                  | "trigger"                   |                                                                                                                    | postgres | internal | RI_FKey_check_ins
                                                                                                                                                                                                                                                                                               | referential
 integrity FOREIGN KEY ... REFERENCES
 pg_catalog | RI_FKey_check_upd                  | "trigger"                   |                                                                                                                    | postgres | internal | RI_FKey_check_upd
                                                                                                                                                                                                                                                                                               | referential
 integrity FOREIGN KEY ... REFERENCES
 pg_catalog | RI_FKey_noaction_del               | "trigger"                   |                                                                                                                    | postgres | internal | RI_FKey_noaction_del
                                                                                                                                                                                                                                                                                               | referential
 integrity ON DELETE NO ACTION
 pg_catalog | RI_FKey_noaction_upd               | "trigger"                   |                                                                                                                    | postgres | internal | RI_FKey_noaction_upd
                                                                                                                                                                                                                                                                                               | referential
 integrity ON UPDATE NO ACTION
 pg_catalog | RI_FKey_restrict_del               | "trigger"                   |                                                                                                                    | postgres | internal | RI_FKey_restrict_del
                                                                                                                                                                                                                                                                                               | referential
 integrity ON DELETE RESTRICT
 pg_catalog | RI_FKey_restrict_upd               | "trigger"                   |                                                                                                                    | postgres | internal | RI_FKey_restrict_upd
                                                                                                                                                                                                                                                                                               | referential
 integrity ON UPDATE RESTRICT
 pg_catalog | RI_FKey_setdefault_del             | "trigger"                   |                                                                                                                    | postgres | internal | RI_FKey_setdefault_del
                                                                                                                                                                                                                                                                                               | referential
 integrity ON DELETE SET DEFAULT
 pg_catalog | RI_FKey_setdefault_upd             | "trigger"                   |                                                                                                                    | postgres | internal | RI_FKey_setdefault_upd
                                                                                                                                                                                                                                                                                               | referential
 integrity ON UPDATE SET DEFAULT
 pg_catalog | RI_FKey_setnull_del                | "trigger"                   |                                                                                                                    | postgres | internal | RI_FKey_setnull_del
                                                                                                                                                                                                                                                                                               | referential
 integrity ON DELETE SET NULL
 pg_catalog | RI_FKey_setnull_upd                | "trigger"                   |                                                                                                                    | postgres | internal | RI_FKey_setnull_upd
                                                                                                                                                                                                                                                                                               | referential
-- More  --