[DRILL-7206] Tuning hash join code using primitive int

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.17.0
• Labels: ready-to-commit
• Assignee: Weijie Tong
• Reporter: Weijie Tong
• Reviewer: Boaz Ben-Zvi
• Created: 24/Apr/19 12:25
• Updated: 30/May/19 17:39
• Resolved: 29/May/19 23:13

Description

This issue is try to tune the HashJoin implementation codes. At right or full join type , the HashJoinProbe will create a List<Integer> member to record the unmatched composed indexes. It can be replaced by a primitive IntArrayList without box/unbox operation ,also benefits the GC if there's more unmatched items.

Issue Links

• links to: GitHub Pull Request #1764