Dooyoung Hwang created SPARK-25353:
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Summary: Refactoring executeTake(n: Int) in SparkPlan
Key: SPARK-25353
URL: https://issues.apache.org/jira/browse/SPARK-25353
Project: Spark
Issue Type: Sub-task
Components: SQL
Affects Versions: 2.3.1
Reporter: Dooyoung Hwang
In some cases, executeTake in SparkPlan could deserialize more than necessary.
For example, df.limit(1000).collect() is executed.
+- executeTake in SparkPlan is called with arg 1000.
+- If total rows count from partitions is 2000, executeTake deserialize
them and create array of InternalRow whose size is 2000.
+- Slice the first 1000 rows, and return them. 1000 rows in the rear are
not used.
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