postgresql中怎么查看函数

**postgres=# \df**

                               List of functions

 Schema |       Name    |    Result data type   |

    Argument data types

                                    |  Type

--------+-----------------------+--------------------+--------------------------

---------------------------------------------------------------------------------

-----------------------------------------------------------------------------------

-------------------------------------------------------------------------+---------

 public | __arima_adjust|double precision[]|distid integer,

 curr_tvals double precision[], prev_tvals double precision[], p integ

er

                                      | normal

 public | __arima_diff

postgres=# \dft

                               List of functions

 Schema |        Name        | Result data type | Argument data types |  Type

--------+--------------------+------------------+---------------------+---------

 public | checkauthtrigger   | trigger          |                     | trigger

 public | postgis_cache_bbox | trigger          |                     | trigger

(2 rows)