Toplink UpdateAllQuery Issue

Question

We're experiencing some problems with an UpdateAllQuery when trying to update some fields belonging to an aggregate mapping within the component we're trying to update.
We want to set these fields to NULL.
One of the fields in the Aggregate mapping is a OneToOne mapping lookup type component. We want to set this field to NULL. (In a nutshell we want to set the FK to this lookup type object to NULL).
In order to accomplish this, we have created a DirectQueryKey for the OneToOne mapping inside of the Aggregate mapping and then physically mapped it within the Component that makes use of the Aggregate mapping.
It appears that this DirectQueryKey is not working properly. Even when we create a ReadAllQuery and use the same selection criteria, TopLink complains with a TOPLINK 6015 "Invalid QueryKey [businessFuncId] in expression" exception when trying to execute the query.
We have checked to make sure the QueryKey name in our TopLink mapping matches the name used in the query definition... we're stumped... can someone review and provide some clues as to what we may be doing wrong.
Here is the UpdateAllQuery definition:
UpdateAllQuery updateQuery = new UpdateAllQuery(RegisterImpl.class);
updateQuery.setCacheUsage(UpdateAllQuery.INVALIDATE_CACHE);
ExpressionBuilder registerBuilder = updateQuery.getExpressionBuilder();
updateQuery.addArgument("userId");
updateQuery.addArgument("channel");
updateQuery.addArgument("token");
updateQuery.addArgument("date");
updateQuery.addArgument("businessFuncId");
Expression reservedDetailReg = registerBuilder.get("reservedDetail");
Expression userIdExp = reservedDetailReg.get("userId").equal(
registerBuilder.getParameter("userId"));
Expression channelExp = reservedDetailReg.get("channel").equal(
registerBuilder.getParameter("channel"));
Expression tokenExp = reservedDetailReg.get("token").equal(
registerBuilder.getParameter("token"));
Expression dateExp = reservedDetailReg.get("date").equal(
registerBuilder.getParameter("date"));
Expression busFuncExp = reservedDetailReg.get("businessFuncId").equal(
registerBuilder.getParameter("businessFuncId"));
updateQuery.setSelectionCriteria(userIdExp.and(channelExp.and(tokenExp.and(dateExp
.and(busFuncExp)))));
updateQuery.addUpdate(reservedDetailReg.get("userId"), "");
updateQuery.addUpdate(reservedDetailReg.get("channel"), "");
updateQuery.addUpdate(reservedDetailReg.get("token"), "");
updateQuery.addUpdate(reservedDetailReg.get("date"), "");
updateQuery.addUpdate(reservedDetailReg.get("businessFuncId"), "");
descriptor.getQueryManager().addQuery(QueryConstants.UNFREEZE_REGISTER_BY_RESERVED_DETAIL,
updateQuery);
Thanks in advance.

Answer 1

In answer to your posted questions:
1) Are you mapping a query key for the lookup object(between an attribute of the object and a field of the table) or are you adding a query key for the relationship mapping?
Answer: We are mapping a DirectQueryKey (see "businessFuncId" above) to a field on the table directly related to the component being updated. However, the query key represents the foreign key (primary key) for a OneToOne mapping contained within an aggregate descriptor.
Here's an explanation of the OR mapping/object relationship (reference the query definition in the original posting for more details):
RegisterImpl (target of updateAllQuery) contains a ReservedDetail (Aggregate mapping) which in turn contains a OneToOne mapping to a BusinessFunction (read-only lookup type object).
We created a DirectQueryKey: businessFuncId which represents the FK on the RegisterImpl table that is used within the ReservedDetail aggregate mapping for the OneToOne mapping to the BusinessFunction component.
This query key is for query purposes only. As you can see from the query definition it is used to avoid a join with a BusinessFunction table. This is because, as we understand it, an UpdateAllQuery can only update ONE target component (table). The problem we're having is: how do you set a OneToOne FK reference field on the target component to NULL???
2) To which descriptor are you adding the query key?
Answer: The query key ("businessFuncId") must be, by convention, defined within the ReservedDetail aggregate mapping. When we map the ReservedDetail aggregate mapping within the RegisterImpl component mapping, we map the query key to the businessFunction FK field contained with the RegisterImpl table, (the target table we're trying to update).