[TAJO-1885] Simple query with projection should be supported

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.11.0
• Component/s: TajoMaster
• Assignee: Hyunsik Choi
• Reporter: Hyunsik Choi
• Created: 23/Sep/15 18:01
• Updated: 28/Sep/15 20:09
• Resolved: 28/Sep/15 18:46

Description

Tajo supports simple query as the following form:

select * from tb1

or

select * from tb1 LIMIT N

In many cases, users want to use some projections or functions like

select x,y,z from tb1 LIMIT N

This kind of queries are usually used to just see the data contents. Many users expect that this query will return the result immediately. But, the simple does not support this case. We need to support it.