[IGNITE-4672] Optimization: for SQL indexes implement comparison using offheap pointer

• Type: Task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: cache
• Assignee: Unassigned
• Reporter: Semen Boikov
• Created: 08/Feb/17 14:32
• Updated: 25/Sep/17 12:45

Description

Currently for objects comparison in sql indexes we copy full row data on heap, but when index is created on BinaryObject's field and object offheap address is known then it is possible do comparison withput on heap copy and object instantiation. Prototype is implemented in branch ignite-3477-offheap-cmp.

Note: IGNITE-4629 partially fixes issue with comparison, but it is not possible to use this optimization in all cases.