using Qt Stored procedure in Firebird - plsql

Question

Good Afternoon,
I'm starting in the world of Qt and a Firebird database.And finish the driver installation process and perform operations onthe database insert, update and consultation.
When I started to make stored procedures and run them from Qt did not work. Does not fail and always us that everything was made ​​perfect, but the database does not run.
I am programming in Linux using Qt 2.0.1 and Firebird 2.1
I create a simple stored procedure test which makes it an insert into a table. It works by running the console but when trying to run fromQt does not work and gives me no errors.The SQL code is:
SET TERM ^ ;CREATE PROCEDURE AGREEGAR_UNO AS BEGIN insert into JUEGO(CODIGO,ESCRUTINIO,ESTADO,FECHA,HORAINICIO) values (next value for GNECODIGOJUEGO,'111,123,154,169,178','Hi', current_date, current_time);END^SET TERM ; ^
GRANT EXECUTE ON PROCEDURE AGREEGAR_UNO TO SYSDBA;
The following code will use to connect to firebird from Qt
bool VentanaPrueba::conectar()
{
this->db= QSqlDatabase::addDatabase("QIBASE","Data");
this->db.setDatabaseName("./BD/Data.fdb");
this->db.setPassword("password");
this->db.setUserName("SYSDBA");
if(!db.open())
{
return false;
}
else
return true;
}
And this is the code that is responsible for calling the procedure
void VentanaPrueba::procedimiento()
{
if (!this->db.isOpen()) this->conectar();
if(this->db.isOpen())
{ QSqlQuery procedimiento = QSqlQuery::QSqlQuery(this->db);
bool bandera = procedimiento.prepare("EXECUTE PROCEDURE AGREEGAR_UNO");
QString err = procedimiento.lastError().text();
bool respuesta= procedimiento.exec();
//this->db.commit();
if(!respuesta)
{
this->db.close();
}else
{
procedimiento.finish();
this->db.commit();
this->db.close();
}
}else{
//error
}
}
Thank you very much for your help.

Answer 1

IBPP or InterBase Plus Plus is a client interface project which connects for Qt with Interbase database system like firebird. Using it you can easily use your firebird database. Download its source code package from http://sourceforge.net/projects/ibpp/files/ or ibpp official site, and unpack. Copy the core folder into your project folder. And add these files in your Qt project.
Read complete guide at
https://rongsheng007.wordpress.com/2010/08/23/make-qt-applications-work-with-firebird-database/

Answer 2

I can't tell if this works for firebird, but you could try the following:
procedimiento.prepare("BEGIN EXECUTE PROCEDURE AGREEGAR_UNO; END;");
This is similar to the PL/SQL passage
BEGIN
EXECUTE PROCEDURE AGREEGAR_UNO;
END;
I am accessing Oracle databases with Qt and had to include the "BEGIN" and "END;" commands there. You don't have the "EXECUTE PROCEDURE" in oracle, but it might be required for Firebird.
Also, I am using Qt 4 so there might be a difference as well.

Answer 3

There is a simpler way, even though little bit weird.
Create a stored procedure in firebird with some output variable to suspend, and a VARCHAR(1024) input variable to pass the procedure call.
And call it in Qt with procedure call as a string parameter.
SET TERM ^ ;
create PROCEDURE SP_EXECUTE (STMNT varchar(1024) )
RETURNS (
INRETURN integer )
AS
BEGIN
execute statement stmnt;
inReturn=1;
suspend;
END^
SET TERM ; ^
}
Then in Qt,
procedimiento.prepare("SELECT INRETURN FROM SP_EXECUTE('EXECUTE PROCEDURE AGREEGAR_UNO')");