dongjoon-hyun commented on a change in pull request #24158: [SPARK-26847][SQL]
Pruning nested serializers from object serializers: MapType support
URL: https://github.com/apache/spark/pull/24158#discussion_r268244801
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/objects.scala
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@@ -132,49 +130,74 @@ object ObjectSerializerPruning extends Rule[LogicalPlan]
{
fields.map(f => collectStructType(f.dataType, structs))
case ArrayType(elementType, _) =>
collectStructType(elementType, structs)
+ case MapType(_, valueType, _) =>
+ // Because we can't select a field from struct in key, so we skip key
type.
Review comment:
Thanks a lot, @viirya !
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