[TAJO-2075] Allowing cross join in the middle of a query plan

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Planner/Optimizer
• Assignee: Unassigned
• Reporter: Jihoon Son
• Created: 15/Feb/16 02:50
• Updated: 15/Feb/16 02:50

Description

Currently the cross join is allowed only at the beginning of a query plan. That is, it is allowed only when at least one of its inputs is a simple relation scan.
This prevents Tajo from executing several popular queries like TPC-DS Q28.