[SQL] MySQL error codes
I'm writing a simple application that connects to database. Everything works fine but there's one thing that I can't solve myself.
Let say that I have a query like that:
QSqlQuery query("UPDATE table SET id=3 WHERE name='name'")
This table already has record with id=3 (id is primary key) and mysql returns with code:
#1062 - Duplicate entry '3' for key 'PRIMARY'
Hovewer, when I execute this query by:
QMessageBox::warning(this, "Database error", QString::number(db.lastError().number()));
I get -1 instead of error code (db.lastError().text() is empty, too). Any ideas what's wrong? How can I get mysql error code after query failed? I need to know what was the reason of the error in order to (for example) inform user about it.
Thanks in advance.
I think I can answer myself :)
@db.lastError().number()@ should be @query.lastError().number()@
db (QSqlDatabase) refers probably to whole database and that's why it doesn't return error codes of unsuccessful executed queries.
Topic can be closed.