[HIVE-3904] Replace hashmaps in JoinOperators to array

• Type: Improvement
• Status: Closed
• Priority: Trivial
• Resolution: Fixed
• Fix Version/s: 0.11.0
• Component/s: Query Processor
• Hadoop Flags: Reviewed
• Assignee: Navis Ryu
• Reporter: Navis Ryu
• Created: 16/Jan/13 05:03
• Updated: 16/May/13 21:11
• Resolved: 28/Feb/13 17:24

Description

Join operator has many HashMaps that maps tag to some internal value(ExprEvals, OIs, etc.) and theses are accessed 5 or more times per an object, which is seemed unnecessary overhead.

Issue Links

• is related to: HIVE-1472 reduce the usage of HashMap and List.iterator.