Use Case
In the volcano model, the pipeline's working mode makes it difficult for us to analyze the actual execution performance of a certain operator. To clarify the data flow of the operator on the timeline for the purpose of analyzing its actual execution performance, material operators can be inserted before and after the operator to divide the data flow.

Describe the solution you'd like
Using hint to insert material operator, using /*+ blocking('all') */ to insert material operator above all operators, using /*+ blocking('dfo') */ to insert material operator above exchange in operators, using /*+ blocking(4, 5, 6) */ to insert material insert material operators before specific operators.

Describe alternatives you've considered

Additional context