morningman commented on a change in pull request #7145:
URL: https://github.com/apache/incubator-doris/pull/7145#discussion_r755138282
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File path: be/src/exec/exec_node.h
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@@ -135,6 +135,12 @@ class ExecNode {
// each implementation should start out by calling the default
implementation.
virtual Status close(RuntimeState* state);
+ virtual void set_num_senders(int num_senders) {}
Review comment:
OK, I see.
But I wonder is it possible to solve this problem by modifying
`ExecNode::collect_scan_nodes` to return the real node type pointer by request?
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