[MDEV-31514] Cursor protocol gives incorrect result with the utf8mb4 character set in COLUMN_LIST function Created: 2023-06-21  Updated: 2023-11-28

Status: Open
Project: MariaDB Server
Component/s: None
Affects Version/s: 10.4, 10.5, 10.6, 10.9, 10.10, 11.0, 11.1, 11.2
Fix Version/s: 10.4, 10.5, 10.6, 11.0, 11.1, 11.2

Type: Bug Priority: Major
Reporter: Lena Startseva Assignee: Alexander Barkov
Resolution: Unresolved Votes: 0
Labels: None

Issue Links:
Relates
relates to MDEV-31005 Make working cursor-protocol Stalled

 Description   

Testcase (run MTR test with --cursor-protocol):

SET NAMES utf8mb4;
 
SELECT COLUMN_LIST(COLUMN_CREATE(_utf8mb4 0xF09F9982, 1));

Expected result:
COLUMN_LIST(COLUMN_CREATE(_utf8mb4 0xF09F9982, 1))
``

Actual result:
COLUMN_LIST(COLUMN_CREATE(_utf8mb4 0xF09F9982, 1))
`????`
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