Actually, for these index-based executors, the targetTable is not that interesting.
Why ask the node for the table and then ask the node for the index name and then ask the table for the index with that name? You can just have one getTargetIndex() method on the indexed node to take care of all that -- I don't even think having the table name in the VOLT_DEBUG is that critical if I have the index name there. OR maybe the VOLT_DEBUG can ask the node for the string to print.