A quick search gave me this announcement of Parrot DBDI from January 2004 and a dbdi-dev mailing list which appears to be long dead. Is Parrot DBDI still being developed? Is anyone working on a different database API or interface for Parrot?
DBDI was an effort to create a database driver interface like the current DBI and DBD modules. It died, so developers are now using an existing interface instead - the Java JDBI. Two such developers are Tim Bunce (who worked on DBI 1, but hasn't had much time to work on its sequel) and Simon Cozens:
http://perlbuzz.com/2008/12/database-access-in-perl-6-is-coming-along-nicely.html
use DBDI;
my $conn = DBDI::DriverManager.getConnection(
"dbdi:SQLite3:test.db", "", "");
my $stm = $conn.createStatement();
my $rs = $stm.executeUpdate("CREATE TABLE foo (bar, baz)");
my $stm = $conn.prepareStatement(
" INSERT INTO foo (bar, baz) VALUES (?, ?)");
$stm.setColumn(1, 123);
$stm.setColumn(2, "Thingy");
$stm.executeUpdate();
This module should be available to all Parrot languages, not just Perl 6.
Actually for Perl 6 we'll probably see an SQL quote operator so you can do stuff like this:
$conn.prepareStatement( Q:sql<INSERT INTO foo (bar, baz) VALUES($bar, $baz)> );
And of course in Perl 6 quote modifiers like Q:sql can be abbreviated, e.g. to qs<> or sql<>