Github user jkbradley commented on the issue:
https://github.com/apache/spark/pull/17218
Issue this PR brought up:
* Background: AssociationRules currently return a 1-element array for the
consequent (predicted item). This makes sense b/c, even though multiple
consequents could be predicted for a given itemset, they belong in different
rules because they have different confidences.
* *Question*: Should we change the schema for "consequent" to be a single
item, rather than an array of a single item?
* CCing people who have worked on this: @zero323 @mlnick @hhbyyh
@felixcheung
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