Try this: (pseudocode) 
my $sth = $dbh->prepare( $sql );
my @var_args = ($bar); # if at least one arg 
if (Some-condition){ 
  push @var_args, $baz; # others, as needed 
}
$sth->execute( @var_args );

[download]
Update: Corrected declaration of my @var_args

             I hope life isn't a big joke, because I don't get it.
                   -SNL

In reply to Re: DBI variable argument count by NetWallah
in thread DBI variable argument count by anothersmurf

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