Expressiveness of SQLException

[Daniel Migowski <dmigowski(at)ikoffice(dot)de>]

Hello dear developers,

I wrote a function for the server, that rises this error when called 
(called and displayed in PGAdmin III):

   ERROR: value too long for type character varying(255)
   SQL Status:22001
   Kontext:PL/pgSQL function "fkt_calculateshoppinglistitems" line 26 
at assignment
   PL/pgSQL function "fkt_calculateallshoppinglistitems" line 16 at FOR 
over SELECT rows

When this function is called by JDBC, the only information stored in the 
exception is:

    ERROR: value too long for type character varying(255)

Which makes debugging from server logfiles much harder. I expected to 
have some more exceptions encapsulated (retrievable with 
getNextException on PSQLException), but found nothing.

Where do I have to look for the missing information?

With best regards,
Daniel Migowski