[TAJO-1311] Enable Scattered Hash Shuffle for CTAS statement.

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.11.0
• Component/s: distributed query plan
• Assignee: JaeHwa Jung
• Reporter: JaeHwa Jung
• Created: 21/Jan/15 07:24
• Updated: 27/Apr/15 09:59
• Resolved: 27/Apr/15 09:29

Description

Currently, Tajo just use hash shuffle for CTAS statement. If you use large partitioned table for target table, you will see poor performance of wrong task number. Thus, we need to calculate the number for the partitioned table with scattered hash shuffle.