Tras mucho buscar para poder conectarme desde Oracle Forms con la base de datos Oracle Database XE, al fin lo he conseguido. A continuación explico los pasos que he seguido para ello con la finalidad de que pueda ser de ayuda para muchos otros:
1. Instalar Oracle Developer Suite 10g
2. Instalar Oracle Database 10g Express Edition
3. Copiamos al portapapeles (ctrl + c) el contenido del fichero tnsnames.ora del directorio C:\oraclexe\app\oracle\product\10.2.0\server\NETWORK\ADMIN (si instalamos Oracle Oracle Database 10g Express Edition en C:\oraclexe )
4. Pegamos el contenido anterior al final del documento tnsnames.ora del directorio C:\DevSuite\NETWORK\ADMIN\ (si hemos instalado Oracle Developer Suite 10g en el directorio C:\DevSuite).
5. Accedemos a la interfaz web de Oracle Database 10g Express Edition entrando en http://127.0.0.1:8080/apex/ . Hacemos login con el usuario SYS y la password que introducimos durante la instalación.
6. En la interfaz web, accedemos a Administración -> Usuarios Base Datos. Observamos que disponemos del usuario llamado «HR», el cual está bloqueado.
Hacemos clic sobre él y en la nueva ventana que aparece introducimos una password, ponemos el estado de la cuenta a «Desbloqueado» y comprobamos que tenga privilegios de CONNECT,RESOURCE y DBA (marcando las casillas).
Una vez hecho esto, pulsamos sobre «Modificar Usuario» con la finalidad de tener un usuario desde el cual conectarnos.
7. Ya podemos conectarnos desde Oracle Developer Suite 10g a la base de datos. Por ejemplo, para conectarnos mediante Forms Developer, vamos a Inicio -> Todos los programas -> Oracle Developer Suite -> Forms Developer -> Start OC4J Instance y a continuación abrimos el Forms Builder. Para ello vamos a Inicio -> Todos los programas -> Oracle Developer Suite -> Forms Developer -> Forms Builder
Ya sólo falta conectarnos con la base de datos. Para ello vamos a Archivo -> Conectar o bien pulsamos «ctrl +j» . Nos aparecerá una nueva ventanita. En ella introducimos:
- Usuario: HR
- Contraseña: la contraseña que definimos en el paso 6.
- Base de Datos: XE
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