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https://issues.apache.org/jira/browse/SPARK-22626?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16276988#comment-16276988
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Apache Spark commented on SPARK-22626:
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User 'wzhfy' has created a pull request for this issue:
https://github.com/apache/spark/pull/19880
> Wrong Hive table statistics may trigger OOM if enables CBO
> ----------------------------------------------------------
>
> Key: SPARK-22626
> URL: https://issues.apache.org/jira/browse/SPARK-22626
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 2.3.0
> Reporter: Yuming Wang
> Assignee: Yuming Wang
> Priority: Minor
> Fix For: 2.3.0
>
>
> How to reproduce:
> {code}
> bin/spark-shell --conf spark.sql.cbo.enabled=true
> {code}
> {code:java}
> import org.apache.spark.sql.execution.joins.BroadcastHashJoinExec
> spark.sql("CREATE TABLE small (c1 bigint) TBLPROPERTIES ('numRows'='3',
> 'rawDataSize'='600','totalSize'='800')")
> // Big table with wrong statistics, numRows=0
> spark.sql("CREATE TABLE big (c1 bigint) TBLPROPERTIES ('numRows'='0',
> 'rawDataSize'='60000000000', 'totalSize'='8000000000000')")
> val plan = spark.sql("select * from small t1 join big t2 on (t1.c1 =
> t2.c1)").queryExecution.executedPlan
> val buildSide =
> plan.children.head.asInstanceOf[BroadcastHashJoinExec].buildSide
> println(buildSide)
> {code}
> The result is {{BuildRight}}, but the right side is the big table.
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