How to change password for user `polardbx_root`

[yejr]

mysql>select user();
+--------------------------+
| USER()                   |
+--------------------------+
| polardbx_root@172.17.0.1 |
+--------------------------+
1 row in set (0.00 sec)

mysql>select current_user();
+----------------+
| current_user() |
+----------------+
| d1@pxc-tryout  |
+----------------+
1 row in set (0.01 sec)

mysql>set password for current_user() = password('pXVwPKGrG');
ERROR 3009 (HY000): [154bfae7a9c01000][172.17.0.5:54645][d1]syntax error, error in :'password for current_user() = password('pXV', expect =, actual (, pos 30, line 1, column 30, token (

mysql>SET PASSWORD FOR 'polardbx_root'@'pxc-tryout' = PASSWORD('654321');
ERROR 3009 (HY000): [154bfb2645801000][172.17.0.5:54645][d1]Illegal host: pxc-tryout

mysql>SET PASSWORD FOR 'polardbx_root'@'%' = PASSWORD('654321');
ERROR 5107 (HY000): [154bfb2f25801000][172.17.0.5:54645][d1]ERR-CODE: [PXC-5107][ERR_OPERATION_NOT_ALLOWED] Can not modify polardbx_root since it is reserved for system

[F-ca7]

https://github.com/ApsaraDB/galaxysql/blob/aac20161d8980cf3c5e6d2d1e1c1bb098db26352/polardbx-server/src/main/java/com/alibaba/polardbx/server/handler/privileges/polar/PolarHandlerCommon.java#L143

Cannot modify polardbx_root is by design. polardbx_root is a built-in root account, which should not be used by users or applications.

I suggest that you create a new account to access PolarDB-X.