Dates and dynamic queries

Question

Hi.
I am retrieving Entity EJBs using dynamic queries.
I had some troubles working with dates.
This is an example about the kind of query I am talking about:
SELECT OBJECT(a) FROM Payment AS a WHERE a.date <= '2/3/2005'
It worked prefectly fine in development environment.
So far so good, but finally it did not work properly in production.
I think the reason is that date format configuration is different (after all, all other queries without any date parameter works fine).
How can I set date format for Weblogic Server 8.1?
Or maybe some other idea about what is going on?
Thanks in advance
Oscar

Answer 1

I'd use a java.sql.PreparedStatement and let it worry about properly escaping that Date. I'd also be leery of returning a ResultSet. That's a database cursor, a scarce resource. Better to load the result of your query into a data structure and close the ResultSet right away.
String sql = "SELECT * FROM purchasedTransaction "
                  + "WHERE "
                  + "transactionDate >= ? AND transactionDate <= ?";
PreparedStatement statement = connection.prepareStatement(sql);
statement.setDate(1, theDateFrom);
statement.setDate(2, theDateTo);
ResultSet result = statement.executeQuery();
while (result.next())
// load your query into a data structure of some kind and return that.
result.close();
statement.close();Returning a CachedRowSet would be better than a ResultSet:
http://www.javaworld.com/javaworld/jw-02-2001/jw-0202-cachedrow.html
MOD