[jira] [Created] (SPARK-32771) The example of expressions.Aggregator in Javadoc / Scaladoc is wrong

["Kousuke Saruta (Jira)" <ji...@apache.org>]

Kousuke Saruta created SPARK-32771:
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             Summary: The example of expressions.Aggregator in Javadoc / Scaladoc is wrong
                 Key: SPARK-32771
                 URL: https://issues.apache.org/jira/browse/SPARK-32771
             Project: Spark
          Issue Type: Bug
          Components: docs
    Affects Versions: 3.0.0, 3.1.0
            Reporter: Kousuke Saruta
            Assignee: Kousuke Saruta


There is an example of expressions.Aggregator in Javadoc and Scaladoc like as follows.
{code:java}
val customSummer =  new Aggregator[Data, Int, Int] {
  def zero: Int = 0
  def reduce(b: Int, a: Data): Int = b + a.i
  def merge(b1: Int, b2: Int): Int = b1 + b2
  def finish(r: Int): Int = r
}.toColumn(){code}
But this example doesn't work because it doesn't define bufferEncoder and outputEncoder.



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