Thank you, David and Chris.
I guess IQ is not an option for me right now, as the company I work for is taking some time to check Hana out... 
.
I've checked my tables again, and I found out that there were some of them without primary key. The performance got slightly better when I created them... Also I took off some indexes, they were making things slower.
Not even close to what I expect...yet... 
Well, I am using a JDBC driver, Hana doesn't have a native driver, does it?