Large insert and java.lang.OutOfMemoryError

Question

Hello.
I have an application that is trying to insert a large amount of data into the database (could be 200,000 rows). We are getting a java.lang.OutOfMemoryError in the process of doing the insert. The inserts are currently being done by looping over a Vector where each element in the Vector contains an id that is needed to do each insert. Actually, the Vector contains instances of DatabaseRow from a previous query done using "executingSelectingCall()". For each DatabaseRow in the Vector, a row is added to another table in the database:
for(int i=0; i<trackingSelectRes.size(); i++)
DatabaseRow dbRow = (DatabaseRow)trackingSelectRes.get(i);
                              BigDecimal recordId = (BigDecimal)dbRow.get(PREMIUM_PK_IN_TMP_TABLE);
                              trackingUpdateSql.setSQLString("INSERT INTO " + trackingTableName + " (" + PK_IN_TRACKING + ", " + PREMIUM_PK_IN_TRACKING + ", " + BMTID + ", " + RULEID + ", " + TIMESTAMP + ") " + "VALUES" +
                                                                      " ("+ TRACKING_PK_SEQ + ".nextval, " + recordId.longValue() + ", '" + rule.getBmtId().getBmtId() + "', '" + rule.getRuleId() + "', sysdate)");
                              //System.out.println("TRACKING PREMIUM INSERT STATEMENT: " + trackingUpdateSql.getSQLString());
                              session.executeNonSelectingCall(trackingUpdateSql);
My first thought is to do a ReportQuery to get the ids that are needed to do the insert instead of loading all of the rows that contain the ids into memory. But, I'm also thinking that we are taking the incorrect approach to the problem. I looked at TopLink's batch writing, but I don't want to create objects for this data. Does TopLink have another way of doing a mass insert or would it be better to use a stored procedure?
Thanks,
Katie

Answer 1

Thanks for your reply. I have another quick question? Could I get a UnitOfWork and call executeNonSelectingCall() with calls to commitAndResume() at a predetermined interval? Would that allow me to not have to commit every row?
Thanks,
Katie