JavaScript Server-Side in oracle apex

JavaScript Server-Side in oracle apex

To use JavaScript on the server-side in Oracle APEX, you can create a PL/SQL function or procedure that includes JavaScript code. The JavaScript code can be executed using the APEX_UTIL.EXECUTE procedure, which allows you to run any JavaScript code on the server-side.

Here's an example of a PL/SQL procedure that includes JavaScript code to retrieve data from the Oracle database and return it as a JSON object:

1CREATE OR REPLACE PROCEDURE get_employees
2AS
3   l_result clob;
4BEGIN
5   -- Execute the JavaScript code using APEX_UTIL.EXECUTE
6   apex_util.execute('
7      var employees = [];
8      var empQuery = "SELECT * FROM employees";
9      var empStatement = conn.prepareStatement(empQuery);
10      var empResultSet = empStatement.executeQuery();
11      while (empResultSet.next()) {
12         var employee = {};
13         employee.id = empResultSet.getInt("employee_id");
14         employee.name = empResultSet.getString("employee_name");
15         employee.email = empResultSet.getString("employee_email");
16         employees.push(employee);
17      }
18      empResultSet.close();
19      empStatement.close();
20      var jsonResult = JSON.stringify(employees);
21      :l_result := jsonResult;
22   ');
23END;
24

In this example, the JavaScript code retrieves data from the "employees" table in the Oracle database and stores it in a JavaScript array. The array is then converted to a JSON object using the JSON.stringify() method, and the result is returned as a CLOB.

You can then call this PL/SQL procedure from your APEX application using a RESTful service or a web service, and the result will be returned as a JSON object that can be processed by your client-side JavaScript code.