(mysql.info.gz) RENAME USER

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 13.5.1.4 `RENAME USER' Syntax
 .............................
 
      RENAME USER OLD_USER TO NEW_USER
          [, OLD_USER TO NEW_USER] ...
 
 The `RENAME USER' statement renames existing MySQL accounts.  To use
 it, you must have the `GRANT OPTION' privilege for the `mysql'
 database.  An error occurs if any old account does not exist or any new
 account exists.  The OLD_USER and NEW_USER values are given the same
 way as for the `GRANT' statement.
 
 The `RENAME USER' statement was added in MySQL 5.0.2.
 

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