Github user viirya commented on the issue:
https://github.com/apache/spark/pull/23239
The migration guide has changed by another followup
https://github.com/apache/spark/pull/23141:
> In Spark version 2.4 and earlier, float/double -0.0 is semantically equal
to 0.0, but users can still distinguish them via `Dataset.show`,
`Dataset.collect` etc. Since Spark 3.0, float/double -0.0 is replaced by 0.0
internally, and users can't distinguish them any more.
Is above still correct after this change?
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