englefly commented on PR #11630:
URL: https://github.com/apache/doris/pull/11630#issuecomment-1210396519
The following two casts are not equivalent.
mysql> select cast(cast("1990-09-01 1:00:00" as datetime) as int);
+-----------------------------------------------------+
| CAST(CAST('1990-09-01 1:00:00' AS DATETIME) AS INT) |
+-----------------------------------------------------+
| -1977439664 |
+-----------------------------------------------------+
1 row in set (0.01 sec)
mysql> select cast("1990-09-01 1:00:00" as int);
+-----------------------------------+
| CAST('1990-09-01 1:00:00' AS INT) |
+-----------------------------------+
| NULL |
+-----------------------------------+
1 row in set (0.01 sec)
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