Retrieving generated keys

[bendem]

[bendem]

Apparently, h2 doesn't support using executeQuery with DML statements, updateReturning solved that, but I removed it in bbe9bf2.

Need to consider if it's worth adding back vs using something like

try (Update update = sql.update(connection -> connection.prepareStatement("insert into table(column) values (?) returning *", Statement.RETURN_GENERATED_KEYS)).with(x)) {
    rejectIf(() -> update.count() != 1);
    try (ResultSet rs = update.getStatement().getGeneratedKeys()) {
        // deal with generated values here.
    }
}