Fetch pl/sql array return values in java

Question

In Java how to get values from a pl/sql function which returns an array.

if my pl/sql function returns array called myArray, in java is it possible to fetch values from myArray into java objects using callablestatement?

Thanks

Update 1

My Java code where I am calling function, but I am getting exception.

PLS-00306: wrong number or types of arguments in call to 'myfunc'




connection = con.getConnection();
        callablestatement = connection.prepareCall("{call myfunc(?,?,?}");
        callablestatement.setInt(1, param1);
        callablestatement.setInt(2, param2);
        callablestatement.setString(3, param3);
        callablestatement.registerOutParameter(4, Types.ARRAY);
        callablestatement.execute();        
        resultSet = callablestatement.getArray(4).getResultSet();

Update 2

private final String PRODECURE_NAME = "{? = call myfunc(?,?,?)}";

and

connection = con.getConnection();
    callablestatement = connection.prepareCall(PRODECURE_NAME);
    callablestatement.registerOutParameter(1, Types.ARRAY);
    callablestatement.setInt(2, param1);
    callablestatement.setInt(3, param2);
    callablestatement.setString(4, param3);

    callablestatement.execute();

create or replace type dates
       is varray(100) of varchar2(32);

function

CREATE OR REPLACE function myfunc (    
    p_id    IN number,
    p_c_id     IN number,
    p_co_no     IN number

)
    RETURN dates
AS
    myarray contract_dates;
    par1        VARCHAR2 (32);
    par2        VARCHAR2 (32);

Fixed Update 3

connection = con.getConnection();
        callablestatement = 
                connection.prepareCall("begin ? :=myfunc(?,?,?); end;");
        callablestatement.registerOutParameter(1, OracleTypes.ARRAY, "DATES");
        callablestatement.setInt(2, param1);
        callablestatement.setInt(3, param2);
        callablestatement.setString(4, param3);
        callablestatement.execute();

Solution 1

I didn't do that with ARRAY but it should works. First you must register out parameter of your function. So it can be like this.

private final String PRODECURE_NAME = "{? = call <ProcedureName>(?,?,?)}";

Connection con = null;
CallableStatement cs = null;

       try {
            con = DAOFactory.getDatabaseConnection();
            cs = con.prepareCall(PRODECURE_NAME);
            cs.registerOutParameter(1, java.sql.Types.ARRAY);
            cs.setYourType(2, <yourData>);
            cs.setYourType(3, <yourData>);
            cs.setYourType(4, <yourData>);
            cs.execute();
            Array arr = cs.getArray(1);
            if (arr != null) {
               String[] data = (String[]) arr.getArray();
            }
        } 
        catch (SQLException ex) {
            Logger.getLogger(OracleLiekDAO.class.getName()).log(Level.SEVERE, null, ex);
            try {
                con.rollback();
            }
        }
        finally {
            if (con != null) {
                try {
                    con.close();
                } 
                catch (SQLException ex) {
                    Logger.getLogger(OracleLiekDAO.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }

Try this man and give me then asnwer wether it do or not.

EDIT:

These char ? represents one parameter that you will set(it's named as parametrized). So this:

cs.setYourType(2, <yourData>);
cs.setYourType(3, <yourData>);
cs.setYourType(4, <yourData>);

means, that you set your three parameters (?), first parameter of method is column index and second are you data of your specific type.

---

EDIT 2:

So sorry i wrote bad solution, already updated so check code now and try it.

Solution 2

myArray returned from PL/SQL is of type java.sql.Array. You can invoke getArray() on it and type cast it to get java array.

String[] array = (String[]) myArray.getArray();

Solution 3

I believe you can use the following method present in the SerialArray class which is a direct descendant of java.sql.Array:

Object getArray(Map<String, Class<?>> map)

Here the Map is a holder of an object and its property which is to be mapped to the fetched resultset in the returned array.

For more details see http://docs.oracle.com/javase/1.5.0/docs/api/javax/sql/rowset/serial/SerialArray.html javadoc

Solution 4

Yes, you need to registerOutParameter of type Types.ARRAY
see example here

Solution 5

The JDBC Specification contains a whole section (16.5) dedicated to dealing with arrays. You might want to give it a look.

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