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RENAME USERold_user TOnew_user    [,old_user TOnew_user] ...

TheRENAME USER statement renames existing MySQL accounts. An error occurs for old accounts that do not exist or new accounts that already exist.

To useRENAME USER, you must have the globalCREATE USER privilege, or theUPDATE privilege for themysql system schema. When theread_only system variable is enabled,RENAME USER additionally requires theCONNECTION_ADMIN privilege (or the deprecatedSUPER privilege).

RENAME USER fails with an error if any account to be renamed is named as theDEFINER attribute for any stored object. (That is, the statement fails if renaming an account would cause a stored object to become orphaned.) To perform the operation anyway, you must have theSET_ANY_DEFINER orALLOW_NONEXISTENT_DEFINER privilege; in this case, the statement succeeds with a warning rather than failing with an error. For additional information, including how to identify which objects name a given account as theDEFINER attribute, seeOrphan Stored Objects.

Each account name uses the format described inSection 8.2.4, “Specifying Account Names”. For example:

RENAME USER 'jeffrey'@'localhost' TO 'jeff'@'127.0.0.1';

The host name part of the account name, if omitted, defaults to'%'.

RENAME USER causes the privileges held by the old user to be those held by the new user. However,RENAME USER does not automatically drop or invalidate databases or objects within them that the old user created. This includes stored programs or views for which theDEFINER attribute names the old user. Attempts to access such objects may produce an error if they execute in definer security context. (For information about security context, seeSection 27.7, “Stored Object Access Control”.)

The privilege changes take effect as indicated inSection 8.2.13, “When Privilege Changes Take Effect”.