Re: rtrim giving weird result

"Ross J. Reedstrom" <reedstrm@rice.edu> writes:
>> Is there a way to just remove the "_opto" from the end of the string?

> If you have exactly one known string to (optionally) remove, this works
> (and even works if the string is missing. Watch out for the early
> occurance of substring problem, though!):

> test=# select substr('center_out_opto',1,(strpos('center_out_opto','_opto')-1)); 

My first thought for any moderately complicated string-bashing problem
is to write a function in pltcl or plperl ... they are much stronger in
string manipulation than SQL itself is.
        regards, tom lane