Allow packed keys and packed values of non-sorted fields in the sort buffer (MDEV-6915)

[MDEV-21263] Allow packed values of non-sorted fields in the sort buffer Created: 2019-12-09  Updated: 2021-12-21  Resolved: 2020-01-20

Status: Closed
Project: MariaDB Server
Component/s: Optimizer
Affects Version/s: None
Fix Version/s: 10.5.1

Type: Technical task Priority: Major
Reporter: Varun Gupta (Inactive) Assignee: Varun Gupta (Inactive)
Resolution: Fixed Votes: 0
Labels: None

Issue Links:
PartOf
is part of MDEV-6915 Allow packed keys and packed values o... Closed
Problem/Incident
causes MDEV-21541 main.sum_distinct-big fails with Asse... Closed
causes MDEV-21542 main.order_by_pack_big fails sporadic... Closed
Relates
relates to MDEV-21665 Server crashes in my_qsort2 / Filesor... Closed
relates to MDEV-27154 allkeys.txt based tests for Unicode-4... Closed
relates to MDEV-27307 main.ctype_utf8mb4_uca_allkeys tests ... Closed

 Description   

This task will allow to have packed values of non-sorted fields in the sort buffer.
It will incorporate the code of wl 1509 from mysql-5.7 that implemented packed values of non-sorted fields in the sort buffer.
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