lidavidm opened a new pull request #11068:
URL: https://github.com/apache/arrow/pull/11068
Example output:
```
ExecPlan with 6 nodes:
SourceNode{"source", outputs=["filter"]}
FilterNode{"filter", inputs=[target: "source"], outputs=["project"],
filter=(i32 >= 0)}
ProjectNode{"project", inputs=[target: "filter"], outputs=["aggregate"],
projection=[bool, multiply(i32, 2)]}
GroupByNode{"aggregate", inputs=[groupby: "project"], outputs=["filter"],
keys=["bool"], aggregates=[
hash_sum(multiply(i32, 2)),
hash_count(multiply(i32, 2), {mode=NON_NULL}),
]}
FilterNode{"filter", inputs=[target: "aggregate"],
outputs=["order_by_sink"], filter=(sum(multiply(i32, 2)) > 10)}
OrderBySinkNode{"order_by_sink", inputs=[collected: "filter"],
by={sort_keys=[sum(multiply(i32, 2)) ASC]}}
```
This prints nodes in the order of the topological sort. Since this is a
graph and not necessarily a tree, I didn't try to indent the nodes themselves
or anything.
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