viirya commented on a change in pull request #24805: [SPARK-27798][SQL]
from_avro shouldn't produces same value when converted to local relation
URL: https://github.com/apache/spark/pull/24805#discussion_r291248613
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
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@@ -1420,9 +1420,9 @@ object ConvertToLocalRelation extends Rule[LogicalPlan] {
def apply(plan: LogicalPlan): LogicalPlan = plan transform {
case Project(projectList, LocalRelation(output, data, isStreaming))
if !projectList.exists(hasUnevaluableExpr) =>
- val projection = new InterpretedProjection(projectList, output)
+ val projection = new InterpretedMutableProjection(projectList, output)
Review comment:
`InterpretedProjection` creates new row for each input. Since we add
`copy()` call, creating new row becomes redundant.
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