MySql - QSqlError is not caught

Question

Here's my code snippet:

try 
{
    if ( query.exec(query_str) == false ) {
    err_desc = query.lastError().text().toStdString();
    return RET_FAIL;
    }
}
catch(QSqlError &e)
{   
    handleError(e);
}

I set a breakpoint inside handleError, but it seems this breakpoint was never reached when there is an error, with err_desc the following value:

MySQL server has gone away QMYSQL: unable to execute query

Why does it fail to catch the error ?

score 2 · Answer 1 · edited May 23 '17 at 10:25

2

I suspect you are not getting an exception when the server has gone away. There are other posts on handling this

edited May 23 '17 at 10:25

Community

1
1

answered Jun 28 '13 at 09:01

doctorlove

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score 2 · Accepted Answer · answered Jun 28 '13 at 09:08

Because there's no error to catch.

If the query fails it return false and set a QSqlError, accessible via QSqlQuery::lastError(), but it doesn't raise an exception.

if ( query.exec(query_str) == false ) {
    err_desc = query.lastError().text().toStdString();
    handleError(query.lastError());
    return RET_FAIL;
}

MySql - QSqlError is not caught

2 Answers2