Yadong Qi created SPARK-12167: --------------------------------- Summary: Invoke the right sameResult function when plan is warpped with SubQueries Key: SPARK-12167 URL: https://issues.apache.org/jira/browse/SPARK-12167 Project: Spark Issue Type: Bug Components: SQL Affects Versions: 1.5.2 Reporter: Yadong Qi
I find this bug when I use cache table, ``` spark-sql> create table src_p(key int, value int) stored as parquet; OK Time taken: 3.144 seconds spark-sql> cache table src_p; Time taken: 1.452 seconds spark-sql> explain extended select count(*) from src_p; ``` I got the wrong physical plan ``` == Physical Plan == TungstenAggregate(key=[], functions=[(count(1),mode=Final,isDistinct=false)], output=[_c0#28L]) TungstenExchange SinglePartition TungstenAggregate(key=[], functions=[(count(1),mode=Partial,isDistinct=false)], output=[currentCount#33L]) Scan ParquetRelation[hdfs://9.91.8.131:9000/user/hive/warehouse/src_p][] ``` and the right physical plan is ``` == Physical Plan == TungstenAggregate(key=[], functions=[(count(1),mode=Final,isDistinct=false)], output=[_c0#47L]) TungstenExchange SinglePartition TungstenAggregate(key=[], functions=[(count(1),mode=Partial,isDistinct=false)], output=[currentCount#62L]) InMemoryColumnarTableScan (InMemoryRelation [key#45,value#46], true, 10000, StorageLevel(true, true, false, true, 1), (Scan ParquetRelation[hdfs://9.91.8.131:9000/user/hive/warehouse/src_p][key#9,value#10]), Some(src_p)) ``` When the implementation classes of `MultiInstanceRelation`(eg. `LogicalRelation`, `LocalRelation`) are warpped with SubQueries, they can't invoke the right `sameResult` function in their own implementation. So we need to eliminate SubQueries first and then try to invoke `sameResult` function in their own implementation. Like: When plan is `Subquery(LogicalRelation(relation:ParquetRelation[hdfs://9.91.8.131:9000/user/hive/warehouse/src_p], expectedOutputAttributes:Some(ArrayBuffer(key#0, value#1))))`, first eliminate SubQueries, and then will invoke the `sameResult` function in `LogicalRelation` instead of `LogicalPlan`. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org