[MCOL-4575] Hash table performance for collation aware DISTINCT Created: 2021-03-03  Updated: 2023-07-02

Status: Open
Project: MariaDB ColumnStore
Component/s: ExeMgr, PrimProc
Affects Version/s: 6.1.1
Fix Version/s: 23.10

Type: Bug Priority: Major
Reporter: David Hall (Inactive) Assignee: Roman
Resolution: Unresolved Votes: 0
Labels: None

Issue Links:
Relates
relates to MCOL-4065 DISTINCT is case sensitive Closed
relates to MCOL-4564 Performance issues for DBT3 queries #... Closed

 Description   

When we fixed MCOL-4065 DISTINCT is case sensitive, we introduced a perfermance degredation. This has been patched for 5.5.2, but a more correct and faster algorithm has been proposed. This Jira is to track work on that proposal.
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