+my $dbh = DBI->connect($config::local_connstr, $config::local_username, $config::local_password)
+ or die "connect: " . $DBI::errstr;
+$dbh->{AutoCommit} = 0;
+$dbh->{RaiseError} = 1;
+
+$dbh->do('SET client_min_messages TO WARNING');
+
+my @locales = find_all_locales($dbh);
+
+my @ratings = ();
+my @covariances = ();
+my @aux_params = ();
+
+for my $locale (@locales) {
+ my $last_season = find_last_season($dbh, $locale);
+ my @games = ();
+ my %ids = ();
+ fetch_games($dbh, $locale, $last_season, \@games, \%ids);
+ my $tmpnam = output_to_file(\@games, \%ids);
+
+ train_model($tmpnam, $locale, \@ratings, \@covariances, \@aux_params);
+ unlink($tmpnam);
+}
+
+$dbh->do('CREATE TABLE new_covariance ( player1 smallint NOT NULL, player2 smallint NOT NULL, cov float NOT NULL )');
+$dbh->do('COPY new_covariance ( player1, player2, cov ) FROM STDIN');
+$dbh->pg_putcopydata(join("\n", @covariances));
+$dbh->pg_putcopyend();
+$dbh->do('ALTER TABLE new_covariance ADD PRIMARY KEY ( player1, player2 );');
+$dbh->do('DROP TABLE IF EXISTS covariance');
+$dbh->do('ALTER TABLE new_covariance RENAME TO covariance');
+
+$dbh->do('TRUNCATE aux_params');
+$dbh->do('COPY aux_params ( kultur, id, value ) FROM STDIN');
+$dbh->pg_putcopydata(join("\n", @aux_params));
+$dbh->pg_putcopyend();
+
+$dbh->do('TRUNCATE ratings');
+$dbh->do('COPY ratings ( id, rating, rating_stddev ) FROM STDIN');
+$dbh->pg_putcopydata(join("\n", @ratings));
+$dbh->pg_putcopyend();
+