[HIVE-735] Queries should be optimized with pre-ordered column

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Query Processor
• Assignee: Unassigned
• Reporter: He Yongqiang
• Created: 07/Aug/09 04:02
• Updated: 07/Aug/09 14:38

Description

If a table has one or some pre-ordered columns and a query has filters(range/point) on these columns. Hive should take advantage of the order information, and only read the needed blocks instead of touching the whole file. And this will also be useful for sorted summary table index.