[MDEV-17607] DATE(COALESCE(year_column)) returns a wrong result Created: 2018-11-03  Updated: 2018-11-04  Resolved: 2018-11-04

Status: Closed
Project: MariaDB Server
Component/s: Data types, Temporal Types
Affects Version/s: 10.4
Fix Version/s: 10.4.0

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

Issue Links:
Relates
relates to MDEV-16926 CAST(COALESCE(year_field)) returns wr... Closed

 Description    

CREATE OR REPLACE TABLE t1 (a YEAR);
 
INSERT INTO t1 VALUES (NULL);
 
SELECT COALESCE(a), DATE(COALESCE(a)) FROM t1;


+-------------+-------------------+
 
| COALESCE(a) | DATE(COALESCE(a)) |
 
+-------------+-------------------+
 
|        NULL | 0000-00-00        |
 
+-------------+-------------------+

The result for DATE(COALESCE(a)) is wrong. It should be NULL.
Generated at Thu Feb 08 08:37:45 UTC 2024 using Jira 8.20.16#820016-sha1:9d11dbea5f4be3d4cc21f03a88dd11d8c8687422.