The IPlan type exposes the following members.
Gets zero or more child plans. A plan is a tree, where each child is another plan. The children are where this part of the plan gets its input records - unless this is an OperatorType that introduces new records on its own.
Gets a list of identifiers used by this plan. Identifiers used by this part of the plan. These can be both identifiers introduce by you, or automatically generated identifiers.
Gets the operation this plan is performing.