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#### client_errc

MySQL client-defined error codes.

##### Synopsis

Defined in header `<boost/mysql/client_errc.hpp>`

    enum client_errc

##### Values

Name | Description
--- | ---
`incomplete_message` | An incomplete message was received from the server (indicates a deserialization error or packet mismatch).
`protocol_value_error` | An unexpected value was found in a server-received message (indicates a deserialization error or packet mismatch).
`server_unsupported` | The server does not support the minimum required capabilities to establish the connection.
`extra_bytes` | Unexpected extra bytes at the end of a message were received (indicates a deserialization error or packet mismatch).
`sequence_number_mismatch` | Mismatched sequence numbers (usually caused by a packet mismatch).
`unknown_auth_plugin` | The user employs an authentication plugin not known to this library.
`auth_plugin_requires_ssl` | The authentication plugin requires the connection to use SSL.
`wrong_num_params` | The number of parameters passed to the prepared statement does not match the number of actual parameters.
`server_doesnt_support_ssl` | The connection mandatory SSL, but the server doesn't accept SSL connections.
`metadata_check_failed` | The static interface detected a mismatch between your C++ type definitions and what the server returned in the query.
`num_resultsets_mismatch` | The static interface detected a mismatch between the number of row types passed to `static_results` or `static_execution_state` and the number of resultsets returned by your query.
`row_type_mismatch` | The StaticRow type passed to read_some_rows does not correspond to the resultset type being read.
`static_row_parsing_error` | The static interface encountered an error when parsing a field into a C++ data structure.
`timeout` | (EXPERIMENTAL) An operation controlled by Boost.MySQL timed out.
`cancelled` | (EXPERIMENTAL) An operation controlled by Boost.MySQL was cancelled.
`pool_not_running` | (EXPERIMENTAL) Getting a connection from a connection_pool failed because the pool is not running. Ensure that you're calling connection_pool::async_run.
`invalid_encoding` | (EXPERIMENTAL) An invalid byte sequence was found while trying to decode a string.
`unformattable_value` | (EXPERIMENTAL) A formatting operation could not format one of its arguments.
`format_string_invalid_syntax` | (EXPERIMENTAL) An format string with invalid syntax was provided to a SQL formatting function.
`format_string_invalid_encoding` | (EXPERIMENTAL) A format string with an invalid byte sequence was provided to a SQL formatting function.
`format_string_manual_auto_mix` | (EXPERIMENTAL) A format string mixes manual (e.g. {0}) and automatic (e.g. {}) indexing.
`format_arg_not_found` | (EXPERIMENTAL) A format argument referenced by a format string was not found. Check the number of format arguments passed and their names.
`unknown_character_set` | (EXPERIMENTAL) The character set used by the connection is not known by the client. Use set_character_set or async_set_character_set before invoking operations that require a known charset.

##### Description

These errors are produced by the client itself, rather than the server.

Convenience header `<boost/mysql.hpp>`