Bug #117811 Incorrect query results for BLOB type

Submitted: 27 Mar 2025 15:19 Modified: 28 Mar 2025 4:34
Reporter: John Jove Email Updates:
Status: Verified Impact on me:
None 
Category:MySQL Server: Optimizer Severity:S1 (Critical)
Version:8.4.4, 8.0.41, 9.2.0 OS:Any
Assigned to: CPU Architecture:Any

[27 Mar 2025 15:19] John Jove 
Description:
I run the following statements, in which an incorrect result is returned.

How to repeat:
CREATE TABLE t1 (c1 BLOB, UNIQUE (c1(4)));
INSERT INTO t1 (c1) VALUES (9);
INSERT INTO t1 (c1) VALUES (110);
SELECT ca4 AS ca1
FROM (SELECT c1 as ca4 FROM t1) AS ta1
         INNER JOIN (SELECT c1 AS ca7 FROM t1) AS ta2 ON (ca4 BETWEEN 1 AND ca7); -- actual: {9, 110}, expected: {9, 9, 110}
[28 Mar 2025 4:34] MySQL Verification Team 
Hello John,

Thank you for the report and test case.
Verified as described.

regards,
Umesh
[3 Apr 2025 14:22] huahua xu 
The collation between `Item_func_between` operator and B-tree index is inconsistent, what caused the phantom.

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