That doesn't make much sense.

If you need values back, you'll use a query that returns the values you need (i.e. with RETURNING), and you'll collect them. 

my $sth = $dbh->prepare($query);
$sth->execute;
while (my $row = $sth->fetchrow_hashref) {
  ...
}

[download]

If you don't need values back, you won't use a query that returns values you need (i.e. without RETURNING), and you won't collect them. 

my $sth = $dbh->prepare($query);
$sth->execute;

[download]

I don't see the ambiguity unless you're writing yet another bad DBI wrapper. I hate to mention this since I fear it will get misused, but I think you can check for the presence of data by checking if the statement handle is Active.

In reply to Re: How to detect postgresql RETURNING usage by ikegami
in thread How to detect postgresql RETURNING usage by Roland684

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