OperationBinding / REMOVE? Sorry but I just donīt get it!

[GWTDummies]

Hi there,

I have two tables: A and B. Table B holds children from A, connected 1:n.
Now, I want to delete three entries in Table B giving the id in parent Table A using this SQL: delete from table_B where fk_id = table_A.pk;

Now I created two DataSources: TableA and TableB.
I want to place in the first DataSource xml file (table A) an operationBinding
to erase the children in table B at the same time.
And here is my question: how can I do it?

Iīve reading the whole Api, but I just donīt get it!

My try:
...
<operationBindings>
<operationBinding operationType="remove" operationId="deleteChildren">
<criteria fieldName="id" value="$mainID"/>
HERE THE SQL, somehow!!!
</operationBinding>
</operationBindings>
...

Please can you give me an example, how can I delete,
within the same operationBinding, values in different tables.
Thanks a lot.

[Isomorphic]

Looks like just:

<customSQL>delete from table_B where fk_id = $mainID;</customSQL>

[GWTDummies]

Hi Isomorphic,

now there is no way to set this criteria before calling my operation.
Criterias just work when retrieving some data.
How can I call my operationBinding, set the id to erase and call my SQL?

Criteria pkIdCriteria = new Criteria();
String pkId = record.getAttribute("pkid");
pkIdCriteria.addCriteria("pkId", pkId);
DataSource ghDatasource = DataSource.getDataSource("MyDS");

// I WANT TO ERASE THE DATA HERE, somehow
ghDatasource.removeData(new Record(), new DSCallback() {
	@Override
	public void execute(DSResponse aResponse, Object aRawData,
						DSRequest aRequest) {
				}
	});

Thanks in advance.

[GWTDummies]

I got IT!!!

For those with the same understanding problem, here is the solution:

DSRequest dsRequest = new DSRequest();
dsRequest.setOperationId("myOperationId");
dsRequest.setAttribute("pkid", idFromJava);
DataSource ghDatasource = DataSource.getDataSource("DSB2BBH");
ghDatasource.removeData(ghRec, null, dsRequest);