About JDBC CALL STORE PROCEDURE with out parameter is greater than 4000

Question

Hi Guys,
I have a problem call store procedure with a large string.
as i know varchar2 can contain 32767 characters in pl/sql .
But when i used varchar2 as a out parameter in a store procedure, if the out parameter is greater than 4000 characters , it always give me error message as 'the buffer is too small'.
why it happened?
I read some article that says i need configure a property in data-source.xml , and jdbc 10g driver already solved this problem, but i used jdev 10.1.3.2 ,the driver should be fine.
How can i solve this problem?
Thanks in advance,
AppCat

Answer 1

Object is Foundation, Execute Script
This is for a query, you can change to a stored procedure call. Pull the value back in the Java code then put into the process variable.
import javax.naming.InitialContext;
import javax.sql.DataSource;
import java.sql.*;
PreparedStatement stmt = null;
Connection conn = null;
ResultSet rs = null;
try {
InitialContext ctx = new InitialContext();
DataSource ds = (DataSource) ctx.lookup("java:IDP_DS");
conn = ds.getConnection();
stmt = conn.prepareStatement("select FUBAR from TB_PT_FUBAR where PROCESS_INSTANCE_ID=?");
stmt.setLong(1, patExecContext.getProcessDataLongValue("/process_data/@inputID"));
rs = stmt.executeQuery();
rs.next();
patExecContext.setProcessDataStringValue("/process_data/outData", rs.getString(1));
} finally {
try {
rs.close();
} catch (Exception rse) {}
try {
stmt.close();
} catch (Exception sse) {}
try {
conn.close();
} catch (Exception cse) {}