When executing the DATE_FORMAT function, TiDB returns unexpected results

[sjyango]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

CREATE TABLE t0 (
  c0 double NOT NULL,
  UNIQUE (c0)
);

INSERT INTO t0 VALUES (0), (0.06771666817351274), (748334112), (1747356538);

SELECT t0.c0 FROM t0 GROUP BY t0.c0 HAVING DATE_FORMAT(t0.c0, t0.c0) IS NULL;

2. What did you expect to see? (Required)

+------------+
| c0         |
+------------+
|  748334112 |
| 1747356538 |
+------------+

3. What did you see instead (Required)

MySQL> SELECT t0.c0 FROM t0 GROUP BY t0.c0 HAVING DATE_FORMAT(t0.c0, t0.c0) IS NULL;
+---------------------+
| c0                  |
+---------------------+
| 0.06771666817351274 |
|           748334112 |
|          1747356538 |
|                   0 |
+---------------------+
4 rows in set, 7 warnings (0.003 sec)

4. What is your TiDB version? (Required)

MySQL> select tidb_version();
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| tidb_version()                                                                                                                                                                                                                               |
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Release Version: v8.0.0
Edition: Community
Git Commit Hash: 8ba1fa452b1ccdbfb85879ea94b9254aabba2916
Git Branch: HEAD
UTC Build Time: 2024-03-28 14:22:04
GoVersion: go1.21.6
Race Enabled: false
Check Table Before Drop: false
Store: tikv |
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.002 sec)

[yibin87]

Unrealistic case, lower to moderate.

[yibin87]

/remove-severity critical

[yibin87]

/severity moderate