geting results of query in plperl

On 3/6/20 6:57 AM, stan wrote:

I have looked at:

https://www.postgresql.org/docs/8.4/plperl-database.html

I am also comfortable querying data from tables in perl. But I do not
quite see how to get the results of a query in plperl. Here is what I
tried, and it is not working:

my $rv2 = spi_exec_query('SELECT current_user');
my $user = $rv2->{rows}[1]->{my_column};

I have used this query in SQL functions, so I know it works. I also ran it
in plsql.

What do I have wrong here?

It starts at zero:

my $user = $rv2->{rows}[0]->{my_column};

Here is some live code:

my ($q, $i, $row, %map);
$q = spi_exec_query('select lower(username) as username, id from employee');
foreach $i (0.. $q->{processed} - 1)
{
$row = $q->{rows}[$i];
$map{ $row->{username} } = $row->{id};
}
$q = undef;