Custom subpanels -> but suite changes the given sql queries

I have had some more time for testing.
SuiteCRM is creating error whenever I use “distinct” or “union”. Even with a “join” in a plain SQL statement it seems to break the statement.

I was wondering, cause I have seen examples with joins in stevens post here:

the only difference is that i tries to have all in a sql statement and there it is splited in an array.
so I changed my code to this:

$return_array['select'] =   "SELECT notes.*";
$return_array['from']   =   "FROM notes";
$return_array['where']  =   "WHERE notes.deleted = 0 AND ( ".
                            " (notes.parent_id = '{$acc_id}' AND notes.parent_type = 'Accounts') ".
                            " OR ".
                            " (notes.parent_id IN (".
                            "    SELECT contacts.id FROM contacts JOIN accounts_contacts ON contacts.id = accounts_contacts.contact_id ".
                            "    WHERE accounts_contacts.account_id = '{$acc_id}' AND contacts.deleted = 0 AND accounts_contacts.deleted = 0 ".
                            "    ) AND notes.parent_type = 'Contacts') ".
                            " )";

This works. At least I got 8 notes displayed and 8 notes shown in the pagination info.

But how can I use this with more complex queries? I would like to receive informations of more than one table?

I tried pumpihg up the select statement like this:

$return_array['select'] =   "SELECT notes.*, 'test' as contact_name";

But the System sees to ignore it.
Than I tried to get a hand on more than 1 table with changeing from and where part.

$return_array['from']   =   "FROM notes, contacts";

but i get the error thet unknown columns where used in the where part. so the from seems not to work on more than 1 Column?

Anyone any Ideas?