merging date and time

Hi,
I'm experiencing some problems to create a view in which I put together a
date and a time in the same field... 

I have a table which contain a date field (with a date inside) and a
varchar field with time inside..

This is the content of those two field in one record:
  |22-03-1999|14:45:27

I just wanted to create a view in which those two field are merged in a
datetime filed..

I tried using different approach but I'm always getting an error message or
while creating the view or when selectin from the created view..

examples:
  create view glob_time as select datetime(euigw.day||euigw.time) as tempo
from euigw;

gives me the following error message;
  ERROR:  There is more than one possible operator '||' for types 'date'
and 'varc  har'         You will have to retype this query using an explicit cast


create view glob_time as select datetime(text(euigw.day)||euigw.time) as
tempo from euigw;

works file, but then if I do select * from glob_time; I get:

ERROR:  Bad datetime external representation 'Mon 22 Mar 00:00:00 1999
MET14:45:
27'


does anyone have an idea about how to solve this?

thanks,

Marco