[TAJO-1655] Add 'Upsert' statement for OLTP-like storages

• Type: Sub-task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Storage
• Assignee: Unassigned
• Reporter: Hyunsik Choi
• Created: 23/Jun/15 09:53
• Updated: 03/May/16 20:15

Description

JDBC-based storage and NoSQL systems provide insert and update feature. We also need to support SQL UPSERT statement for them, allowing users to instantly update or isnert data onto these storages in Tajo.