[MDEV-23366] ROUND(18446744073709551615,rand()*0) returns a wrong result Created: 2020-08-02  Updated: 2020-08-03  Resolved: 2020-08-03

Status: Closed
Project: MariaDB Server
Component/s: Data types
Affects Version/s: 10.1, 10.2, 10.3, 10.4, 10.5
Fix Version/s: 10.4.14, 10.5.5

Type: Bug Priority: Major
Reporter: Alexander Barkov Assignee: Alexander Barkov
Resolution: Fixed Votes: 0
Labels: None

Issue Links:
Relates
relates to MDEV-23032 FLOOR()/CEIL() incorrectly calculate ... Closed

 Description    

SELECT
 
  ROUND(18446744073709551615,rand()*0) AS c1,
 
  ROUND(18446744073709551615.0,rand()*0) AS c2;


+----------------------+------------------------+
 
| c1                   | c2                     |
 
+----------------------+------------------------+
 
| 18446744073709552000 | 18446744073709551615.0 |
 
+----------------------+------------------------+

The result for c1 is wrong. It should be equal to 18446744073709551615, like c2, just without the '.0' part.
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