From ea342c61658ba0961063cfcd7737ad91c2f2ef67 Mon Sep 17 00:00:00 2001
From: Davies Liu <davies.liu@gmail.com>
Date: Fri, 17 Jun 2016 12:53:12 -0700
Subject: [PATCH] fix checking results and bump to 0.4.9

---
 src/main/scala/com/databricks/spark/sql/perf/Query.scala | 9 +++------
 version.sbt                                              | 2 +-
 2 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/src/main/scala/com/databricks/spark/sql/perf/Query.scala b/src/main/scala/com/databricks/spark/sql/perf/Query.scala
index 498835f..3868efd 100644
--- a/src/main/scala/com/databricks/spark/sql/perf/Query.scala
+++ b/src/main/scala/com/databricks/spark/sql/perf/Query.scala
@@ -127,13 +127,10 @@ class Query(
           case ExecutionMode.WriteParquet(location) =>
             dataFrame.write.parquet(s"$location/$name.parquet")
           case ExecutionMode.HashResults =>
-            val columnStr = dataFrame.schema.map(_.name).mkString(",")
-            // SELECT SUM(HASH(col1, col2, ...)) FROM (benchmark query)
+            // SELECT SUM(CRC32(CONCAT_WS(", ", *))) FROM (benchmark query)
             val row =
               dataFrame
-                .selectExpr(s"hash($columnStr) as hashValue")
-                .groupBy()
-                .sum("hashValue")
+                .selectExpr(s"sum(crc32(concat_ws(',', *)))")
                 .head()
             result = if (row.isNullAt(0)) None else Some(row.getLong(0))
         }
@@ -169,4 +166,4 @@ class Query(
   def checkResult: Query = {
     new Query(name, buildDataFrame, description, sqlText, ExecutionMode.HashResults)
   }
-}
\ No newline at end of file
+}
diff --git a/version.sbt b/version.sbt
index 1524105..f4273b3 100644
--- a/version.sbt
+++ b/version.sbt
@@ -1 +1 @@
-version in ThisBuild := "0.4.8-SNAPSHOT"
+version in ThisBuild := "0.4.9-SNAPSHOT"