Details
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Bug
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Status: Closed (View Workflow)
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Major
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Resolution: Fixed
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5.5.39, 10.0.14
Description
The server variable character_set_client is used by the parser to parse the incoming queries, and as such it can only be set to a character set that is supported by the parser. There is a special check that prevents a non-supported value from being assigned to character_set_client.
But on the server startup the initial value of the global character_set_client is taken from --default-character-set option — it sets all character set variables, including character_set_client, and that bypasses the validity check.