DB2 Stored Procedure from Java-JDBC

Question

Hi All,
I am using DB2 stored procedure which have been written in COBOL. I have two types of stored procedures. First types of stored procedure takes IN parameter and returns OUT parameter. These stored procedures are working fine. The second type of stored procedure takes IN parameter and returns a CURSOR. According to Database team (who wrote these stored procedure) claims that they can see data in a cursor when they test these stored procedure directly in the database. However, when I run these stored procedures from Java code it returns NULL ResultSet. Here is the code:
public SearchResult getAllBenefitHEDType(SearchParameter searchParam) throws DAOException {
log.debug(" getAllBenefitHEDType method - entering ");
HashMap searchParametersMap = searchParam.getHashMap();
SearchResult searchResult = new SearchResult();
String type = (String) searchParametersMap.get(UDFConstant.LOOKUP_SEARCH_TYPE);
HashMap resultParametersMap = new HashMap();
ArrayList resultSetDTO = new ArrayList();
try {
conn = this.getConnection();
conn.setAutoCommit(false);
System.out.println("getAllBenefitHEDType Step 1");
CallableStatement cs = conn.prepareCall("{call TEST.APS003(?)}"); // Stored Procedure with one IN parameter.
cs.setString(1,type);
boolean retVal = cs.execute(); // this should return true if ResultSet is available.. in my case it is returning false.
// I tried with getting the Object
ResultSet rs = (ResultSet) cs.getObject(1); // this should give me a valid result set ... in my case I am getting null
if (rs!=null) {
System.out.println("getAllBenefitHEDType Step 4A Result Set Not Null");
} else {
System.out.println("getAllBenefitHEDType Step 4A Result Set Is Null");
// I tried getting the resultset
ResultSet rs1 = cs.getResultSet(); // this should give me a valid result set ... in my case I am getting null
if (rs1!=null) {
System.out.println("getAllBenefitHEDType Step 4D Result Set Not Null");
} else {
System.out.println("getAllBenefitHEDType Step 4D Result Set Is Null");
while (rs.next()) {
System.out.println("getAllBenefitHEDType Step 5");
LookupDTO lookupDTO = new LookupDTO();
// the following code populate the Lookup DTOs from ResultSet.

Answer 1

A few comments...
1) Creating tables, particularly tables whose names seem to imply that they are temporary tables, on the fly in a stored procedure is a bad idea. That is not the way to work with Oracle, though it is a common practice in other databases like SQL Server. There is undoubtedly a better way to do this in Oracle if you can explain what you're trying to accomplish from a business standpoint.
2) If you are going to use dynamic SQL, you almost always want to use bind variables, not literals. One of the quickest ways to kill an Oracle database's performance is to not use bind variables.
3) As has already been mentioned, assuming FH_INICIO is a DATE column, you need to put an explicit TO_DATE around your strings in order to convert them to dates. Otherwise, Oracle's implicit cast depends on the session's NLS_DATE_FORMAT, which is likely to be different in different client applications and from different client machines.
Justin