[TAJO-1962] Add description for session variables

• Type: Task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.12.0, 0.11.1
• Component/s: Documentation
• Assignee: Jihoon Son
• Reporter: Jihoon Son
• Created: 05/Nov/15 05:47
• Updated: 26/Nov/15 18:15
• Resolved: 26/Nov/15 16:44

Description

Our document (http://tajo.apache.org/docs/devel/tsql/variables.html) only shows the list of session variables. It would be much helpful if we add some description.