Unable to AES_DECRYPT after AES_ENCRYPT in mysql

Question

I created user table

CREATE  TABLE `user` (
`id` BIGINT UNSIGNED NOT NULL AUTO_INCREMENT ,
`first_name` VARBINARY(100) NULL ,
`address` VARBINARY(200) NOT N         


        

Answer 1

From mysql command line client there is no need to use CAST:

mysql> SELECT AES_DECRYPT(AES_ENCRYPT('admin','abc'),'abc');

+-----------------------------------------------+
| AES_DECRYPT(AES_ENCRYPT('admin','abc'),'abc') |
+-----------------------------------------------+
| admin                                         |
+-----------------------------------------------+
1 row in set (0.00 sec)

mysql> SELECT CAST(AES_DECRYPT(AES_ENCRYPT('admin','abc'),'abc') AS CHAR (50));

+------------------------------------------------------------------+
| CAST(AES_DECRYPT(AES_ENCRYPT('admin','abc'),'abc') AS CHAR (50)) |
+------------------------------------------------------------------+
| admin                                                            |
+------------------------------------------------------------------+
1 row in set (0.02 sec)

As you can see using cast in command line is little bit slower. But I have noticed that if you use some tools like phpmyadmin, then you need to use CAST, otherwise result will be wrong.