HyukjinKwon edited a comment on pull request #29214:
URL: https://github.com/apache/spark/pull/29214#issuecomment-665400947
Hey, sorry. I missed it. Seems this isn't consistent with Scala side:
```scala
scala> spark.range(10).filter("FALSE").head
java.util.NoSuchElementException: next on empty iterator
at scala.collection.Iterator$$anon$2.next(Iterator.scala:41)
at scala.collection.Iterator$$anon$2.next(Iterator.scala:39)
at scala.collection.IndexedSeqLike$Elements.next(IndexedSeqLike.scala:63)
at scala.collection.IterableLike.head(IterableLike.scala:109)
at scala.collection.IterableLike.head$(IterableLike.scala:108)
at
scala.collection.mutable.ArrayOps$ofRef.scala$collection$IndexedSeqOptimized$$super$head(ArrayOps.scala:198)
at scala.collection.IndexedSeqOptimized.head(IndexedSeqOptimized.scala:129)
at
scala.collection.IndexedSeqOptimized.head$(IndexedSeqOptimized.scala:129)
at scala.collection.mutable.ArrayOps$ofRef.head(ArrayOps.scala:198)
at org.apache.spark.sql.Dataset.head(Dataset.scala:2717)
... 47 elided
scala> spark.range(10).filter("FALSE").head(0)
res1: Array[Long] = Array()
```
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