Github user maropu commented on the issue:
https://github.com/apache/spark/pull/19082
I checked the three pattens on `q66`;
```
q66
master 15960
master + pr18931 14226
master + pr19082 + pr18931 1960
```
You can all the result
[here](https://docs.google.com/spreadsheets/d/1RCLxauxLPR64znllFu55fgMo1YXAY7ihZy929XHZa5s/edit?usp=sharing).
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