[SPARK-22626] Wrong Hive table statistics may trigger OOM if enables CBO

• Type: Sub-task
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.3.0
• Fix Version/s: 2.3.0
• Component/s: SQL
• Assignee: Yuming Wang
• Reporter: Yuming Wang
• Created: 28/Nov/17 10:31
• Updated: 04/Dec/17 16:02
• Resolved: 03/Dec/17 15:14

Description

How to reproduce:

bin/spark-shell --conf spark.sql.cbo.enabled=true

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)

The result is BuildRight, but the right side is the big table.

Issue Links

• links to: [Github] Pull Request #19831 (wangyum)
• links to: [Github] Pull Request #19880 (wzhfy)