JESSE CHEN created SPARK-13858:
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Summary: TPCDS query 21 returns wrong results compared to TPC
official result set
Key: SPARK-13858
URL: https://issues.apache.org/jira/browse/SPARK-13858
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 1.6.0
Reporter: JESSE CHEN
Majority of the TPCDS queries ran faster in 1.6.0 than in 1.4.1, average about
9% faster. There are a few degraded, and one that is definitely not within
error margin is query 66.
Query 66 in 1.4.1: 699 seconds
Query 66 in 1.6.0: 918 seconds
30% worse.
Collected the physical plans from both versions - drastic difference maybe
partially from using Tungsten in 1.6, but anything else at play here?
Please see plans here:
https://ibm.box.com/spark-sql-q66-debug-160plan
https://ibm.box.com/spark-sql-q66-debug-141plan
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