fanfuxiaoran commented on PR #670:
URL: https://github.com/apache/cloudberry/pull/670#issuecomment-2507454697
>> In parallel plan cases, what do the statistic results should be? Do
current codes compute results right or it's already as expected?
Maybe the current codes don't need to do anything else more, but we should
be clear about that.
Yes, agree! Looks we don't a lot things for the parallel workers. Cloudberry
uses motion to gather the slice result both from workers on different segments
and from the parallel worker on same segment . So the EXPLAIN ANALYZE command
can still work properly to collect results from all workers.
But we should confirm the EXPLAIN ANALYZE output format for the plan
contains parallel workers. what should it be like?
```
Rows out: 333333.33 rows avg x 3 workers, 1000000 rows max (seg1), 0 rows
min (seg0).
```
Do we need to add the parallel worker info into this line? like
```
Rows out: 333333.33 rows avg x 3 workers from xx segments?, 1000000 rows
max (seg1 worker?), 0 rows min (seg0 worker?).
```
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