Github user HyukjinKwon commented on the issue:
https://github.com/apache/spark/pull/17590
I think it is because it only checks multiple dots and the case I described
above was finally found now (in my previous PR related with `from_json`
function).
I think multiple dots are still valid per ...
> The preferred form for variable names is all lower case letters and words
separated with dots
Yea, maybe. I am fine with leaving this open for some days more to see if
there is any objection. Probably, let me cc who I saw made many contributions.
cc @shivaram, @yanboliang, @wangmiao1981 and @actuaryzhang here. Please let me
know if there is any concern.
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