I need an simple example on java-Oracle8i entreprise

Question

Hi,
Could anyone give me an simple example of a Java method which will be loaded into Oracle.
Let say, the method will read the email address based on employee_ID from a table called Employee. Thank you very much for all your help.
Hellenie
PS: I would like to see java code and to see how it could call a table without having to deal with connection object ,statement,etc...
null

Answer 1

This is the example from the Oracle's 8.1.6 Documentation - Java Stored pocedures Developer's guide -
step 1 :
import java.sql.*;
import java.io.*;
import oracle.jdbc.driver.*;
public class RowCounter {
public static int rowCount (String tabName) throws SQLException {
Connection conn = new OracleDriver().defaultConnection();
// here is the connection made
String sql = "SELECT COUNT(*) FROM " + tabName;
int rows = 0;
try {
Statement stmt = conn.createStatement();
ResultSet rset = stmt.executeQuery(sql);
// same old createStatement, executeQuery ...
while (rset.next()) {rows = rset.getInt(1);}
rset.close();
stmt.close();
} catch (SQLException e) {System.err.println(e.getMessage());}
return rows;
Step 2:
use loadjava command line utility and
specify the class name, username/password to
load the code into the database.
step 3:
On sql prompt, the class and method name are
mapped to stored procedure
CREATE FUNCTION row_count (tab_name VARCHAR2) RETURN NUMBER
AS LANGUAGE JAVA
NAME 'RowCounter.rowCount(java.lang.String) return int';
You can invoke the procedure using CALL method from SQL prompt.
Cheers,
Adithya
null