🖥️ Mainframe Database Interaction Tool

Welcome to the Mainframe Natural Training Project
This is a program developed in Natural, a programming language for mainframe environments. The program allows users to select and modify data from a company table (AOCUCOTU), using two interactive maps and simulated transactions.

---

🛠️ Project Description

The goal of the program is to enable users to:

1. Select a record from the AOCUCOTU table (companies) in ascending or descending order.
2. View the details of the selected record.
3. Modify specific fields of the record and simulate updates using a backout transaction (no real changes are made to the database).

---

🎮 Key Features

Here are the main features of the program:

1. Record Selection

• Users can choose between ascending (A) or descending (D) order to display records.
• If no order is selected, the first 5 records are displayed by default.

2. Interactive Maps

• Map 1 (SGCM0108): Allows users to select a record by marking it with an X.
• Map 2 (SGCM108B): Displays the details of the selected record and allows users to modify specific fields (CCOA, GREC-CCO, IPRC-CCO).

3. Simulated Updates

• Uses a backout transaction to simulate updates without making real changes to the database.
• After simulating an update, a confirmation message is displayed.

4. Error Handling

• Validates user input (e.g., ensures only one record is selected, checks for valid order selection).
• Displays error messages for invalid inputs or actions.

---

🎮 How to Use

1. Start the program: The first map (SGCM0108) is displayed.
2. Select an order: Choose between ascending (A) or descending (D) order, or press Enter to display the first 5 records.
3. Select a record: Mark a record with an X and press Enter to view its details on the second map (SGCM108B).
4. Modify fields: Update the fields (CCOA, GREC-CCO, IPRC-CCO) as needed.
5. Simulate an update: Press PF4 to simulate the update and see a confirmation message.
6. Exit: Press PF3 at any time to exit the program.

---

⚙️ System Requirements

• Environment: Mainframe with Natural programming language support.
• Resources: The program is designed to run in a terminal-based mainframe environment.

---

📂 Code Structure

• Main Logic: The program is structured into subroutines for handling each map and performing actions like record selection, validation, and simulated updates.
• Maps:
  • SGCM0108: For record selection.
  • SGCM108B: For displaying and modifying record details.
• Variables: Key variables include CCOK (company code), CCOA (company name), GREC-CCO (group code), and IPRC-CCO (priority code).

---

🎨 Credits

• Developed by: Sergio Gracia Correia.
• Purpose: This project was created as part of a training program to demonstrate skills in Natural programming and mainframe environment interaction.
• Inspiration: The program showcases how to handle user input, simulate transactions, and interact with databases in a mainframe environment.

---