encrypt() ??

[꺼벙이 <thinker0@xxxx>]

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$ mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 80 to server version: 3.23.29a-gamma

Type 'help;' or '\h' for help. Type '\c' to clear the buffer

mysql> select encrypt('test');
+-----------------+
| encrypt('test')       |
+-----------------+
| NULL                     |
+-----------------+
1 row in set (0.00 sec)

mysql>

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... encrypt() function Error::::