Github user mgaido91 commented on a diff in the pull request:
https://github.com/apache/spark/pull/21619#discussion_r197612189
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/javaCode.scala
---
@@ -148,14 +149,17 @@ trait Block extends JavaCode {
}
// Concatenates this block with other block.
- def + (other: Block): Block
+ def + (other: Block): Block = other match {
+ case EmptyBlock => this
+ case _ => code"$this\n$other"
--- End diff --
I see, thanks for your explanation
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