Postfix/Pgsql unsupported dictionary type

Hello,
I'm using postfix on Solaris 9 and I need the Postgress data base support. I'm using the CSW version of postfix:
CSW - Details for postfix

But in the log files of postfix I see

I read on other forums that this means that the Pgsql support is not compiled in the postfix.

How can I be sure that the pgsql is/is not installed ?

Is there a way to install the pgsql support without recompiling Postfix ?

For example, on Debian there is a postfix-pgsql package that can be installed.

Thanks.
regards,
Tex