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Assignment 2
Objective:
In this assignment, you will create a set of stored procedures and user
defined functions using Oracle (PL/SQL). This assignment helps students
learn a basic understanding of application development using Oracle
database using PL/SQL.
Submission:
Your submission will include:
1- A single .sql file containing the stored procedures
2- A single output file demonstrating that your stored procedures all
function correctly
Here are the filenames for the two files you will submit:
A02-<lastname>-<firstname>.sql
A02-<lastname>-<firstname>-output
Make sure you follow proper indentation and comments and exception
handling and good coding standards. This is worth marks.
Instruction:
In this assignment, we use the same database that you have been using
for the labs and the assignment 1.
2 | P a g e
Note: For each query in your assignment, make sure you handle the
errors and display the proper message including the error code and the
error message.
Stored Procedures:
find_customer (customer_id IN NUMBER, found OUT NUMBER);
This procedure has an input parameter to receive the customer ID and
an output parameter named found.
This procedure looks for the given customer ID in the database. If the
customer exists, it sets the variable found to 1. Otherwise, the found
variable is set to 0.
Make sure to handle the situation when no data was found.
This stored procedure will print out an appropriate message about
customer ID being found or not found, using the found variable.
find_product (product_id IN NUMBER, price OUT
products.list_price%TYPE);
This procedure has an input parameter to receive the product ID and an
output parameter named price.
This procedure looks for the given product ID in the database. If the
product exists, it stores the product’s list_price in the variable price.
Otherwise, the price variable is set to 0.
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Make sure to handle the situation where no data is found.
This stored procedure will print out an appropriate message about the
price of the product, using the variables described.
add_order (customer_id IN NUMBER, new_order_id OUT NUMBER)
This procedure has an input parameter to receive the customer ID and
an output parameter named new_order_id.
To add a new order for the given customer ID, you need to generate
the new order Id. To calculate the new order Id, find the maximum
order ID in the orders table and increase it by 1.
This procedure inserts the following values in the orders table:
new_order_id
customer_id (input parameter)
‘Shipped'(The value for the order status)
56 (The sales person ID)
sysdate (order date which is the current date)
This stored procedure will print out the information associated with the
order being added including the information above and appropriate
text summarizing the order information.
add_order_item (orderId IN order_items.order_id%type,
itemId IN order_items.item_id%type,
productId IN order_items.product_id%type,
quantity IN order_items.quantity%type,
price IN order_items.unit_price%type)
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This procedure has five IN parameters. It stores the values of these
parameters to the table order_items.
This procedure needs to handle errors such as an invalid order ID
display_order (orderId IN NUMBER)
This procedure has an input parameter to receive the order ID and no
output parameters.
This procedure will display the order items associated with a particular
order ID.
The information to be displayed should include:
• Order ID
• Customer ID
Then should display a row for each item in the order including:
• Item ID
• Product ID
• Quantity
• Price
Then should print a statement showing the total price of the entire
order.
There should be an appropriate message for a non-existent order ID
master_proc (task IN NUMBER,
parm1 IN NUMBER)
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This procedure is a master procedure for four of the five procedures
above.
If task = 1, then, call find_customer(parm1)
If task = 2, then, call find_product(parm1)
If task = 3, then, call add_order(parm1)
If task = 4, then, call display-order(parm1)
In all cases, parm1 is the single input parameter required for the
specific function.
You need to handle appropriate error messages here as well.
What to include in your SQL file:
In your SQL file, you should include all of your:
CREATE OR REPLACE PROCEDURE commands(5)
CALL commands(14)
What to include in your OUTPUT file:
In your output file, you should include:
1 – find_customer – with a valid customer ID
2 – find_customer – with an invalid customer ID
3 – find_product – with a valid product ID
4 – find_product – with an invalid product ID
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5 – add_order – with a valid customer ID
6 – add_order – with an invalid customer ID
7 – add_order_item – should execute successfully 5 times
8 – add_order_item – should execute with an invalid order ID
9 – display_order – with a valid order ID which has at least 5 order
items
10 – display_order – with an invalid order ID
For 1 – 6 and 9 – 10 – your call should be to the master_proc
procedure. It will call the actual procedure itself.

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