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[SPARK-22626][SQL] It deals with wrong Hive's statistics (zero rowCount) #19831

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[SPARK-22626][SQL] It deals with wrong Hive's statistics (zero rowCount) #19831

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ed7352f
if dataSize > 0, rowCount should bigger than 0.
wangyum Nov 28, 2017
b16f88e
add test
wangyum Nov 28, 2017
5c43b2a
fix test error
wangyum Nov 28, 2017
5b744e3
Move test to StatisticsSuite
wangyum Dec 3, 2017
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add test
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@wangyum
wangyum committed Nov 28, 2017
commit b16f88ef971040e682fafe28f0ff06877814e3df
18 changes: 17 additions & 1 deletion sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala
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Expand Up @@ -32,7 +32,7 @@ import org.apache.spark.sql.{AnalysisException, DataFrame, Row, SparkSession}
import org.apache.spark.sql.catalyst.expressions.Cast
import org.apache.spark.sql.catalyst.parser.ParseException
import org.apache.spark.sql.catalyst.plans.logical.Project
import org.apache.spark.sql.execution.joins.BroadcastNestedLoopJoinExec
import org.apache.spark.sql.execution.joins.{BroadcastHashJoinExec, BroadcastNestedLoopJoinExec, BuildLeft}
import org.apache.spark.sql.hive._
import org.apache.spark.sql.hive.test.TestHive
import org.apache.spark.sql.hive.test.TestHive._
Expand Down Expand Up @@ -1187,6 +1187,22 @@ class HiveQuerySuite extends HiveComparisonTest with SQLTestUtils with BeforeAnd
}
}
}

test("Wrong Hive table statistics may trigger OOM if enables join reorder in CBO") {
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@wzhfy wzhfy Dec 2, 2017

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IMHO you can just test the read logic for Hive's stats properties in StatisticsSuite, instead of a end-to-end test case, developers may not know what's going on by this test case.

withTable("small", "big") {
sql("CREATE TABLE small (c1 bigint)" +
"TBLPROPERTIES ('numRows'='3', 'rawDataSize'='600','totalSize'='800')")
sql("CREATE TABLE big (c1 bigint)" +
"TBLPROPERTIES ('numRows'='0', 'rawDataSize'='60000000000', 'totalSize'='8000000000000')")

withSQLConf(SQLConf.CBO_ENABLED.key -> "true", SQLConf.JOIN_REORDER_ENABLED.key -> "true") {
val plan = sql("select count(*) from small t1 join big t2 on (t1.c1 = t2.c1)")
.queryExecution.executedPlan
val buildSide = plan.children.head.asInstanceOf[BroadcastHashJoinExec].buildSide
assert(buildSide === BuildLeft)
}
}
}
}

// for SPARK-2180 test
Expand Down