OK, I have a case like this where I have a one to many and the many can be up to 500,000 items. In that case, I have a one-sided relationship (to-one in the detail items) defined in EOModeler and custom business logic for managing the items in the relationship.

For deleting, I simply use ERXEOAccessUtilities.deleteRowsDescribedByQualifier( .... ); which bypasses EOF and just does SQL delete in one statement.
just know that your snapshot cache is now out of sync unless you do something more ...

ms

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