MySQL 8.4.3
Source Code Documentation
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Changes the user of the current connection.
Also and resets the following connection state:
It is going through the same states as the Initial Handshake
Type | Name | Description |
---|---|---|
int<1> | command | 0x11: COM_CHANGE_USER |
string<NUL> | user | user name |
if capabilities & CLIENT_SECURE_CONNECTION { | ||
int<1> | auth_plugin_data_len | length of auth_response |
$length | auth_plugin_data | authentication data |
} else { | ||
string<NUL> | auth_plugin_data | authentication data (9 bytes) |
} | ||
string<NUL> | database | schema name |
if more data available { | ||
if capabilities & CLIENT_PROTOCOL_41 { | ||
int<2> | character_set | new connection character set. See Character Set |
} – CLIENT_PROTOCOL_41 | ||
if capabilities & CLIENT_PLUGIN_AUTH { | ||
string<NUL> | auth_plugin_name | client authentication plugin name used to generate auth_plugin_data |
} – CLIENT_PLUGIN_AUTH | ||
if capabilities & CLIENT_CONNECT_ATTRS { | ||
int<lenenc> | connection_attributes_length | length in bytes of the following block of key-value pairs |
$length | key | Key name |
$length | value | value of key |
more key/value pairs until connection_attributes_length is depleted | ||
} – CLIENT_CONNECT_ATTRS | ||
} – more data available |
Please also read Authentication After COM_CHANGE_USER Command