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Posted to issues@spark.apache.org by "Wenchen Fan (JIRA)" <ji...@apache.org> on 2017/05/26 15:07:04 UTC

[jira] [Created] (SPARK-20897) cached self-join should not fail

Wenchen Fan created SPARK-20897:
-----------------------------------

             Summary: cached self-join should not fail
                 Key: SPARK-20897
                 URL: https://issues.apache.org/jira/browse/SPARK-20897
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 2.2.0
            Reporter: Wenchen Fan
            Assignee: Wenchen Fan


code to reproduce this bug:
{code}
// force to plan sort merge join
spark.conf.set("spark.sql.autoBroadcastJoinThreshold", "0")
val df = Seq(1 -> "a").toDF("i", "j")
val df1 = df.as("t1")
val df2 = df.as("t2")
assert(df1.join(df2, $"t1.i" === $"t2.i").cache().count() == 1)
{code}



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