CallableStatement + registerOutParameter + multiple row result

Question

I\'ve got a SQL statement of the form:

BEGIN\\n 
UPDATE tab 
SET stuff
WHERE stuff
RETURNING intA, intB, stringC
INTO ?,?,?

I\'ve registere

Answer 1

To build upon what Luke Woodward answered and to refine my previous answer, you can create an Oracle type, use it to temporarily store data, and then return a sys_refcursor with your updates.

Create the new type:

CREATE OR REPLACE TYPE rowid_tab AS TABLE OF varchar2(30);

Create the database function:

CREATE OR REPLACE
FUNCTION update_tab
RETURN sys_refcursor
IS
    ref_cur sys_refcursor;
    v_tab rowid_tab;
BEGIN
    UPDATE tab 
    SET intA = intA+2
      , intB = intB*2
      , stringC = stringC||' more stuff.'
    RETURNING ROWID
    BULK COLLECT INTO v_tab;

    OPEN ref_cur FOR 
        WITH DATA AS (SELECT * FROM TABLE(v_tab))
        SELECT intA, intB, stringC
        FROM tab
        where rowid in (select * from data);
    RETURN ref_cur;
END;

Now, call the function in your java:

import java.math.BigDecimal;
import java.util.Arrays;
import java.sql.*;
import oracle.sql.*;
import oracle.jdbc.*;

public class StructTest {    
    public static void main(String[] args) 
        throws Exception 
    {   
        System.out.println("Start...");

        ResultSet results = null;
        Connection c = DriverManager.getConnection( "jdbc:oracle:thin:@localhost:1521:xe", "scott", "tiger");
        c.setAutoCommit(false);        

        String sql = "begin ? := update_tab(); end;";
        System.out.println("sql = "+sql);
        CallableStatement stmt = c.prepareCall(sql);        
        /* Register the out parameter. */
        System.out.println("register out param");
        stmt.registerOutParameter(1, OracleTypes.CURSOR);
        // get the result set
        stmt.execute();
        results = (ResultSet) stmt.getObject(1);
        while (results.next()){
            System.out.println("intA: "+results.getString(1)+", intB: "+results.getString(2)+", stringC: "+results.getString(3));
        }
        c.rollback();        
        c.close();    
    }
}

With my test data, I got the following results:

intA: 3, intB: 4, stringC: a more stuff.
intA: 6, intB: 10, stringC: C more stuff.
intA: 3, intB: 4, stringC: a more stuff.