Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/18972#discussion_r150222142
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
---
@@ -809,6 +809,36 @@ class CodegenContext {
}
/**
+ * Wrap the generated code of expression, which was created from a row
object in INPUT_ROW,
+ * by a function. ev,isNull and ev.value are passed by global variables
--- End diff --
typo: `ev.isNull`
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