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Editorial Team
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Asked: 2026-05-29T09:16:10+00:00

Suppose there is a MySQL user alice that is currently connected to the database.

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Suppose there is a MySQL user alice that is currently connected to the database. Suppose another user bob deletes alice while she is still working. What will happen? will bob fail? Will alice be disconnected immediately? Will she receive error message upon her next query? Or will she be able to finish her session as usual?

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  1. Editorial Team

    12.7.1.2. DROP USER Syntax:

    DROP USER does not automatically close any open user sessions. Rather, in the event that a user with an open session is dropped, the statement does not take effect until that user’s session is closed. Once the session is closed, the user is dropped, and that user’s next attempt to log in will fail. This is by design.

    …and 5.4.6. When Privilege Changes Take Effect it’s somehow related:

    If you modify the grant tables indirectly using account-management statements such as GRANT, REVOKE, or SET PASSWORD, the server notices these changes and loads the grant tables into memory again immediately.

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