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  1. MariaDB Server
  2. MDEV-5690

No warning when comparing a DATETIME column to a negative TIME value

        Details

        • Type: Bug
        • Status: Open
        • Priority: Minor
        • Resolution: Unresolved
        • Affects Version/s: 10.0.8
        • Fix Version/s: 10.0
        • Component/s: None
        • Labels:
          None

          Description

          If I compare a DATETIME column to a negative TIME value,
          it does not print any warnings:

          mysql> drop table if exists t1; create table t1 (f1 datetime, key (f1));  insert into t1 values ('2000-09-12 00:00:00'), ('2007-04-25 05:08:49'); select * from t1 where f1 > time('-00:00:01'); 
Query OK, 0 rows affected (0.05 sec)

Query OK, 0 rows affected (0.18 sec)

Query OK, 2 rows affected (0.00 sec)
Records: 2  Duplicates: 0  Warnings: 0

+---------------------+
| f1                  |
+---------------------+
| 2000-09-12 00:00:00 |
| 2007-04-25 05:08:49 |
+---------------------+
2 rows in set (0.00 sec)

          At the same time it does print warnings for negative number:

          mysql> select * from t1 where f1 > -1;
+---------------------+
| f1                  |
+---------------------+
| 2000-09-12 00:00:00 |
| 2007-04-25 05:08:49 |
+---------------------+
2 rows in set, 1 warning (0.00 sec)

mysql> show warnings;
+---------+------+--------------------------------+
| Level   | Code | Message                        |
+---------+------+--------------------------------+
| Warning | 1292 | Incorrect datetime value: '-1' |
+---------+------+--------------------------------+
1 row in set (0.00 sec)

          Comparison to TIME should be fixed to print the warning.

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                  • Assignee:
                    bar Alexander Barkov
                    Reporter:
                    bar Alexander Barkov
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                    Dates

                    • Created:
                      Updated: