How do I look at the source code column only in a function using psql command line utility?

I'm running the below command to show the source code for a PostgreSQL function, but it is difficult to read because there are other columns being shown. Is there any way to show only the source code column? For now, I am copying and paste the output to text editor that does not word wrap. I do not have access to PgAdmin.

haloror=# \df+ latest_vitals_trigger_function
                                                                                                             List of functions
 Schema |              Name              | Result data type | Argument data types | Volatility |  Owner   | Language |                                              Source code                                              | Description 
--------+--------------------------------+------------------+---------------------+------------+----------+----------+-------------------------------------------------------------------------------------------------------+-------------
 public | latest_vitals_trigger_function | trigger          |                     | volatile   | postgres | plpgsql  |                                                                                                       | 
                                                                                                                     :     declare                                                                                             
                                                                                                                     :       row record;                                                                                       
                                                                                                                     :     begin                                                                                               
                                                                                                                     :       for row in (select device_strap_status.id from device_strap_status inner join devices_users       
                                                                                                                     :                     on device_strap_status.id = devices_users.device_id where                           
                                                                                                                     :                     device_strap_status.is_fastened = 1 and devices_users.user_id = new.user_id) loop   
                                                                                                                     :           update latest_vitals set updated_at = now() where id = row.id;                                
                                                                                                                     :       if NOT FOUND then                                                                                 
                                                                                                                     :           insert into latest_vitals (id, updated_at) values (row.id, now());                   开发者_JAVA百科         
                                                                                                                     :       end if;                                                                                           
                                                                                                                     :       end loop;                                                                                         
                                                                                                                     :       return null;                                                                                      
                                                                                                                     :     end;                                                                                                
                                                                                                                     :                                                                                                         
(1 row)

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OK, any time you want to see what sql lies behind a psql \ command, just start it like this:

psql -E mydb

Then when you run a \ command, the queries used to make it work will show up above your output.

Just copy and paste that query, and remove the columns you don't want from the select list.

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I usually issue "\x" before using "\df+", which will put the values vertically instead of horizontally. Which is fine just as a quick "stop shoving the info over to the right" workaround. I also wrap the psql binary to set my LESS environment variable so that the pager doesn't wrap lines, which helps too.