MySQL 5.6 C API Developer Guide
const char * mysql_error(MYSQL *mysql)
For the connection specified by mysql
,
mysql_error()
returns a
null-terminated string containing the error message for the
most recently invoked API function that failed. If a function
did not fail, the return value of
mysql_error()
may be the
previous error or an empty string to indicate no error.
A rule of thumb is that all functions that have to ask the
server for information reset
mysql_error()
if they succeed.
For functions that reset
mysql_error()
, either of these
two tests can be used to check for an error:
if(*mysql_error(&mysql)) { // an error occurred } if(mysql_error(&mysql)[0]) { // an error occurred }
The language of the client error messages may be changed by recompiling the MySQL client library. You can choose error messages in several different languages. See Setting the Error Message Language.
A null-terminated character string that describes the error. An empty string if no error occurred.