ErrAccessDenied is returned when the user does not have sufficient privileges.

ErrAccessDeniedNoPassword is returned when trying to use an anonymous user without password is not allowed.

ErrConCount is returned when too many connections are established by the user.

ErrInvalidSequence is returned when the sequence of method invocations is not correct.

ErrInvalidType is returned when the type of a value is not expected.

ErrMultiStatementDisabled is returned when the user tries to send multiple statements in one statement.

ErrMustChangePassword is returned when the user must change the password.

ErrNetPacketTooLarge is returned when the user sends a packet too large.

ErrNewAbortingConnection is returned when the user tries to connect with an aborting connection.

ErrNotAllowedCommand is returned when the used command is not in the expected list.

ErrNotSupportedAuthMode is returned when the user uses an unsupported authentication method.

ErrSecureTransportRequired is returned when the user tries to connect without SSL.

ErrServerShutdown is returned when the server is shutting down.