Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/13096#discussion_r63152997
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
---
@@ -1560,7 +1561,15 @@ object EmbedSerializerInFilter extends
Rule[LogicalPlan] {
val newCondition = condition transform {
case a: Attribute if a == d.output.head => d.deserializer
}
- Filter(newCondition, d.child)
+ val filter = Filter(newCondition, d.child)
+
+ // Adds an extra Project here, to preserve the output expr id of
`SerializeFromObject`.
+ // We will remove it later in RemoveAliasOnlyProject rule.
+ val objAttrs = filter.output.zip(s.output).map {
+ case (fout, sout) =>
+ Alias(fout, fout.name)(exprId = sout.exprId)
--- End diff --
(it seems putting the case in the same line is preferred (`foreach { case
(name, _) =>`)
[scala-style-guide#pattern-matching](https://github.com/databricks/scala-style-guide#pattern-matching))
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