Liang-Chi Hsieh created SPARK-14627:
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Summary: In TypedAggregateExpression update method we call
encoder.shift many times
Key: SPARK-14627
URL: https://issues.apache.org/jira/browse/SPARK-14627
Project: Spark
Issue Type: Improvement
Reporter: Liang-Chi Hsieh
Priority: Minor
Every time we call TypedAggregateExpression.update method, we call encoder's
shift method. As shift method will copy encoder and underlying BoundReference,
we should prepare the shifted encoder in advance, instead of calling shift
method every time.
BTW, we can also improve encoder's shift method to return itself when shift
delta is zero.
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