Yuming Wang created SPARK-22489:
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Summary: Shouldn't change broadcast join buildSide if user clearly
specified
Key: SPARK-22489
URL: https://issues.apache.org/jira/browse/SPARK-22489
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.3.0
Reporter: Yuming Wang
How to reproduce:
{code:java}
import org.apache.spark.sql.execution.joins.BroadcastHashJoinExec
spark.createDataFrame(Seq((1, "4"), (2, "2"))).toDF("key",
"value").createTempView("table1")
spark.createDataFrame(Seq((1, "1"), (2, "2"))).toDF("key",
"value").createTempView("table2")
val bl = sql(s"SELECT /*+ MAPJOIN(t1) */ * FROM table1 t1 JOIN table2 t2 ON
t1.key = t2.key").queryExecution.executedPlan
println(bl.children.head.asInstanceOf[BroadcastHashJoinExec].buildSide)
{code}
The result is {{BuildRight}}, but should be {{BuildLeft}}
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