BUG #1371: Short-circuit evaluation on PL/PgSQL

The following bug has been logged online:

Bug reference:      1371
Logged by:          Aguinaldo Possatto
Email address:      aguinaldo@aswti.com
PostgreSQL version: 8.0
Operating system:   Windows XP
Description:        Short-circuit evaluation on PL/PgSQL
Details:

an exception is raised when this block is being executed:

if ( ((tg_op = 'INSERT') and
        (new.field is not null)) or
    ((tg_op = 'DELETE') and
        (old.field is not null)) )
then
  ...
end if;

the error is :
"SQL Error: ERRO: record "old" is not assigned yet"

but if the evaluation was "short-circuit" this error would not happen.