"Rui Martins" <Rui(dot)Martins(at)PDMFC(dot)com> writes:
> But the sub-expression did "match" !
No, the sub-expression "(something)" did not match. What did match
is the larger expression "(something)?". You seem to be failing
to recognize that these are two different things. If you put the
capturing parentheses around the larger expression then you will
get the result you want.
regards, tom lane