That's why all GPU databases I know of are columnar, or at least hybrid (in the case of IBM DB2 BLU)... The more complex the operations performed on the column

That's why all GPU databases I know of are columnar, or at least hybrid (in the case of IBM DB2 BLU)... The more complex the operations performed on the columns (trasnform), the better the GPU database will be - because of the higher ops/bytes ratio