mysql- create a user error ERROR 1396 (HY000): Operation CREATE USER

Creating user mysql- given ERROR 1396 (HY000): Operation CREATE USER failed for 'root' @ 'localhost'
Create User:
Create User 'Test' @ '%' IDENTIFIED by 'Test';
display ERROR 1396 (HY000): Operation CREATE uSER failed for 'test' @ ' %'
view is not the existence of this user
select user from user;
found no such user.
Remember the last time the user has been deleted. May not have permission to refresh
flush privileges;
after or not error ERROR 1396 (HY000): Operation CREATE USER failed for 'test' @ '%'
no way to delete one:
drop the User 'the Test' @ '%';
flush privileges;
after create user 'test' @ '%' identified by 'test';
success.
Internet to find the next reason:
Assume there at The IS the User, the User at The SO drop
the After the Deleting the User at The, there IS need to flush privileges at The MySQL
Now the Create the User at The.

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Origin blog.csdn.net/cbiexi/article/details/104833865
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