[JDBC] FUNCTION

FUCTION 

CREATE OR REPLACE FUNCTION TEST_FUNC(p_n1 EMP.ENAME%TYPE)
RETURN DEPT.DNAME%TYPE
IS
    V_DNAME DEPT.DNAME%TYPE;
    V_DEPTNO EMP.DEPTNO%TYPE;
BEGIN
    SELECT DEPTNO INTO V_DEPTNO FROM EMP WHERE ENAME = p_n1;
    SELECT DNAME INTO V_DNAME FROM DEPT WHERE DEPTNO = V_DEPTNO;
    
    RETURN V_DNAME;
    
END;​

package dbc7;

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;

public class FunctionCall {

	public static void main(String[] args) {
		try {
			Class.forName("oracle.jdbc.driver.OracleDriver");
			Connection con = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe", "test", "1111");
			CallableStatement cstmt = con.prepareCall("{ ?=call TEST_FUNC(?)}");
			cstmt.registerOutParameter(1, Types.VARCHAR);
			cstmt.setString(2, "TURNER");
			// ?에 값 바인딩
			cstmt.executeUpdate();
//			cstmt.executeQuery(); //사용가능
//			cstmt.execute(); //사용가능
			System.out.println(cstmt.getString(1));
			// 사용한 객체 닫기
			PreparedStatement ps = con.prepareStatement("SELECT TEST_FUNC(?) FROM DUAL");
			ps.setString(1, "TURNER");
			ResultSet rs = ps.executeQuery();
			while (rs.next()) {
				System.out.println("부서명: " + rs.getString(1));
			}
			rs.close();
			ps.close();

			cstmt.close();
			con.close();
		} catch (Exception e) {
			System.out.println(e.getMessage());
			e.printStackTrace();
		}

	}

}​