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Posted to issues@spark.apache.org by "Herman van Hovell (JIRA)" <ji...@apache.org> on 2016/11/16 15:37:58 UTC
[jira] [Closed] (SPARK-8466) Bug in SQL Optimizer: Unresolved
Attribute after pushing Filter below Project
[ https://issues.apache.org/jira/browse/SPARK-8466?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Herman van Hovell closed SPARK-8466.
------------------------------------
Resolution: Not A Problem
> Bug in SQL Optimizer: Unresolved Attribute after pushing Filter below Project
> -----------------------------------------------------------------------------
>
> Key: SPARK-8466
> URL: https://issues.apache.org/jira/browse/SPARK-8466
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.3.1, 1.4.0
> Reporter: Kai Zeng
> Priority: Critical
>
> Input Data: a parquet file stored in hdfs://xxxx/data with two columns (lifeAverageBitrateKbps int, playtimems int)
> =================================
> Scripts used in spark-shell:
> {code}
> val df = sqlContext.parquetFile("hdfs://xxxx/data")
> import org.apache.spark.sql.types._
> val cols = df.schema.fields.map { f =>
> val dataType = f.dataType match {
> case DoubleType | FloatType => DecimalType.Unlimited
> case t => t
> }
> df.col(f.name).cast(dataType).as(f.name)
> }
> df.select(cols: _*).registerTempTable("t")
> val query =
> """
> |SELECT avg(cleanedplaytimems),
> | count(1)
> |FROM
> | (SELECT 0 key,
> | avg(lifeAverageBitrateKbps) avgbitrate
> | FROM anon_sdm2_ss
> | WHERE lifeAverageBitrateKbps > 0) t1,
> | (SELECT 0 key,
> | lifeAverageBitrateKbps,
> | if(playtimems > 0, playtimems, 0) cleanedplaytimems
> | FROM anon_sdm2_ss
> | WHERE lifeAverageBitrateKbps > 0) t2
> |WHERE t1.key=t2.key
> | AND t2.lifeAverageBitrateKbps < 0.5 * t1.avgbitrate
> """.stripMargin
> sqlContext.sql(query).explain(true)
> {code}
> ===========================
> Output:
> {code}
> == Analyzed Logical Plan ==
> Aggregate [], [AVG(CAST(cleanedplaytimems#110, LongType)) AS _c0#111,COUNT(1) AS _c1#112L]
> Filter ((key#107 = key#109) && (CAST(lifeAverageBitrateKbps#105, DoubleType) < (0.5 * avgbitrate#108)))
> Join Inner, None
> Subquery t1
> Aggregate [], [0 AS key#107,AVG(CAST(lifeAverageBitrateKbps#105, LongType)) AS avgbitrate#108]
> Filter (lifeAverageBitrateKbps#105 > 0)
> Subquery anon_sdm2_ss
> Project [CAST(lifeaveragebitratekbps#27, IntegerType) AS lifeaveragebitratekbps#105,CAST(playtimems#89, IntegerType) AS playtimems#106]
> Relation[lifeaveragebitratekbps#27,playtimems#89] ParquetRelation2(WrappedArray(hdfs://xxxx/data),Map(),None,None)
> Subquery t2
> Project [0 AS key#109,lifeAverageBitrateKbps#105,HiveGenericUdf#org.apache.hadoop.hive.ql.udf.generic.GenericUDFIf((playtimems#106 > 0),playtimems#106,0) AS cleanedplaytimems#110]
> Filter (lifeAverageBitrateKbps#105 > 0)
> Subquery anon_sdm2_ss
> Project [CAST(lifeaveragebitratekbps#27, IntegerType) AS lifeaveragebitratekbps#105,CAST(playtimems#89, IntegerType) AS playtimems#106]
> Relation[lifeaveragebitratekbps#27,playtimems#89] ParquetRelation2(WrappedArray(hdfs://xxxx/data),Map(),None,None)
> == Optimized Logical Plan ==
> Aggregate [], [AVG(CAST(cleanedplaytimems#110, LongType)) AS _c0#111,COUNT(1) AS _c1#112L]
> Project [cleanedplaytimems#110]
> Join Inner, Some(((key#107 = key#109) && (CAST(lifeAverageBitrateKbps#105, DoubleType) < (0.5 * avgbitrate#108))))
> Aggregate [], [0 AS key#107,AVG(CAST(lifeAverageBitrateKbps#105, LongType)) AS avgbitrate#108]
> Project [lifeaveragebitratekbps#27 AS lifeaveragebitratekbps#105]
> !Filter (lifeAverageBitrateKbps#105 > 0)
> Relation[lifeaveragebitratekbps#27,playtimems#89] ParquetRelation2(WrappedArray(hdfs://xxxx/data),Map(),None,None)
> Project [0 AS key#109,lifeaveragebitratekbps#27 AS lifeaveragebitratekbps#105,HiveGenericUdf#org.apache.hadoop.hive.ql.udf.generic.GenericUDFIf((playtimems#89 AS playtimems#106 > 0),playtimems#89 AS playtimems#106,0) AS cleanedplaytimems#110]
> !Filter (lifeAverageBitrateKbps#105 > 0)
> Relation[lifeaveragebitratekbps#27,playtimems#89] ParquetRelation2(WrappedArray(hdfs://xxxx/data),Map(),None,None)
> {code}
> Note:
> Filter is unresolved
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