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https://dev.mysql.com/doc/c-api/8.4/en/mysql-next-result.html
Return Values Return Value Description 0 Successful and there are more results -1 Successful and there are no more results >0 An error occurred Errors CR_COMMANDS_OUT_OF_SYNC Commands were executed in an improper order. int mysql_next_result(MYSQL ...
https://dev.mysql.com/doc/c-api/8.4/en/mysql-options4.html
If the key is empty or already exists in the current set of connection attributes, an error occurs. For calls that cause this limit to be exceeded, a CR_INVALID_PARAMETER_NO error occurs. Example This example demonstrates the calls that specify ...
https://dev.mysql.com/doc/c-api/8.4/en/mysql-ping.html
If the connection is down and auto-reconnect is disabled, mysql_ping() returns an error. int mysql_ping(MYSQL *mysql) Description Checks whether the connection to the server is working. If the connection has gone down and auto-reconnect is enabled ...
https://dev.mysql.com/doc/c-api/8.4/en/mysql-real-connect.html
It causes the parser to generate an error if you use that syntax, which is useful for trapping bugs in some ODBC programs. CR_VERSION_ERROR A protocol mismatch resulted from attempting to connect to a server with a client library that uses a ...
https://dev.mysql.com/doc/c-api/8.4/en/mysql-stmt-close.html
For a failed mysql_stmt_close() call, do not call mysql_stmt_error(), or mysql_stmt_errno(), or mysql_stmt_sqlstate() to obtain error information because mysql_stmt_close() makes the statement handler invalid. mysql_stmt_close() also deallocates the ...
https://dev.mysql.com/doc/c-api/8.4/en/mysql-stmt-next-result.html
Return Values Return Value Description 0 Successful and there are more results -1 Successful and there are no more results >0 An error occurred Errors CR_COMMANDS_OUT_OF_SYNC Commands were executed in an improper order. int ...
https://dev.mysql.com/doc/c-api/8.4/en/mysql-stmt-prepare.html
CR_SERVER_LOST The connection to the server was lost during the query CR_UNKNOWN_ERROR An unknown error occurred. If the prepare operation was unsuccessful (that is, mysql_stmt_prepare() returns nonzero), the error message can be obtained by calling ... int mysql_stmt_prepare(MYSQL_STMT *stmt, const char *stmt_str, unsigned long length) Description Given the statement handler returned by mysql_stmt_init(), prepares the SQL statement pointed to by the string stmt_str and returns a status ...
https://dev.mysql.com/doc/c-api/8.4/en/mysql-stmt-reset.html
It resets the statement on the server, data sent using mysql_stmt_send_long_data(), unbuffered result sets and current errors. CR_SERVER_LOST The connection to the server was lost during the query CR_UNKNOWN_ERROR An unknown error occurred. bool ...
https://dev.mysql.com/doc/c-api/8.4/en/mysql-use-result.html
The C API gives the error Commands out of sync; you can't run this command now if you forget to do this! You may not use mysql_data_seek(), mysql_row_seek(), mysql_row_tell(), mysql_num_rows(), or mysql_affected_rows() with a result returned from ...
https://dev.mysql.com/doc/relnotes/mysql-cluster-manager/8.4/en/news-8-4-3.html
(Bug #37021997) Client: When a mysqld node quit unexpectedly, the error message given was uninformative. The mcm client now displays error information extracted from the mysqld log in the situation. (Bug #36924101) Client: The error text for the ...