cloud-fan commented on code in PR #57380:
URL: https://github.com/apache/spark/pull/57380#discussion_r3615923432
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicLogicalOperators.scala:
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@@ -2727,6 +2731,8 @@ object AsOfJoin {
(leftOperand.dataType, rightOperand.dataType) match {
case (ArrayType(leftElem, _), ArrayType(rightElem, _))
if DataTypeUtils.sameType(leftElem, rightElem) =>
+ // Array comparison (and ordering distance) use Spark's lexicographic
array ordering,
Review Comment:
Please narrow this claim to array comparison. The distance path below uses
`ZipWith`, which extends to the longer length and supplies `null` for a missing
element, so unequal lengths produce an element-wise padded distance such as
`[0, null]`, not a lexicographic length tie-break.
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