[Interest] Did the bound value handling changed in 5.x? If yes, why?

[Guido Seifert]

I am wondering. 
I have a program, which runs perfectly fine with Qt 4.8.
In dozens of places I do:
QString queryString = "SOME SQL STATEMENT with :foo;";
QSqlQuery query(queryString, database);
query.bindValue(":foo", xxxxxx);
query.exec();

Now I tried to compile the program with Qt 5.1. Compiles fine, 
but the database stuff is totally broken. Above value binding 
does not seem to work anymore.

Now I have to do:
QString queryString = "SOME SQL STATEMENT with :foo;";
QSqlQuery query(database);
query.prepare(queryString);
query.bindValue(":foo", xxxxxx);
query.exec();


Not too difficult to change, but WHY?

Guido


-- 
Guido Seifert <wargand at gmx.de>