viirya commented on a change in pull request #27851: [SPARK-31071][SQL] Allow
annotating non-null fields when encoding Java Beans
URL: https://github.com/apache/spark/pull/27851#discussion_r390107102
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SerializerBuildHelper.scala
##########
@@ -187,8 +187,12 @@ object SerializerBuildHelper {
val nonNullOutput = CreateNamedStruct(fields.flatMap { case(fieldName,
fieldExpr) =>
argumentsForFieldSerializer(fieldName, fieldExpr)
})
- val nullOutput = expressions.Literal.create(null, nonNullOutput.dataType)
- expressions.If(IsNull(inputObject), nullOutput, nonNullOutput)
+ if (inputObject.nullable) {
+ val nullOutput = expressions.Literal.create(null, nonNullOutput.dataType)
+ expressions.If(IsNull(inputObject), nullOutput, nonNullOutput)
Review comment:
In `createDataset`, we use the `schema` of current encoder to be the output
of `LocalRelation`. So the output schema is kept to be nullable.
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