zhztheplayer opened a new pull request, #9749:
URL: https://github.com/apache/incubator-gluten/pull/9749
Add an internal property `MemoRole` so every plan node in memo will be of
one of the following 2 roles:
- HUB
This role indicates a node which is called "hub node", and is only
used for building paths for sending to rule applier. Only hub nodes can be
connected with hub nodes. When a node is a "hub node", all of its required
child constraints will be ignored by the memo.
- USER
This role indicates a node which is called "user node", and could be
used for best finding that results in the final outcome of the query planner.
For example, the 9 way left-deep join test case got 15% faster to finish
after this change.
The patch also includes essential refactors and code cleanups.
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