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From "Rui Li (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-16948) Invalid explain when running dynamic partition pruning query in Hive On Spark
Date Thu, 27 Jul 2017 06:05:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-16948?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16102762#comment-16102762
] 

Rui Li commented on HIVE-16948:
-------------------------------

Is it possible that the DPP work doesn't contain branches, and therefore when the target work
is gone, the whole DPP work/task should be removed?

> Invalid explain when running dynamic partition pruning query in Hive On Spark
> -----------------------------------------------------------------------------
>
>                 Key: HIVE-16948
>                 URL: https://issues.apache.org/jira/browse/HIVE-16948
>             Project: Hive
>          Issue Type: Bug
>            Reporter: liyunzhang_intel
>            Assignee: liyunzhang_intel
>         Attachments: HIVE-16948_1.patch, HIVE-16948.patch
>
>
> in [union_subquery.q|https://github.com/apache/hive/blob/master/ql/src/test/queries/clientpositive/spark_dynamic_partition_pruning.q#L107]
in spark_dynamic_partition_pruning.q
> {code}
> set hive.optimize.ppd=true;
> set hive.ppd.remove.duplicatefilters=true;
> set hive.spark.dynamic.partition.pruning=true;
> set hive.optimize.metadataonly=false;
> set hive.optimize.index.filter=true;
> set hive.strict.checks.cartesian.product=false;
> explain select ds from (select distinct(ds) as ds from srcpart union all select distinct(ds)
as ds from srcpart) s where s.ds in (select max(srcpart.ds) from srcpart union all select
min(srcpart.ds) from srcpart);
> {code}
> explain 
> {code}
> STAGE DEPENDENCIES:
>   Stage-2 is a root stage
>   Stage-1 depends on stages: Stage-2
>   Stage-0 depends on stages: Stage-1
> STAGE PLANS:
>   Stage: Stage-2
>     Spark
>       Edges:
>         Reducer 11 <- Map 10 (GROUP, 1)
>         Reducer 13 <- Map 12 (GROUP, 1)
>       DagName: root_20170622231525_20a777e5-e659-4138-b605-65f8395e18e2:2
>       Vertices:
>         Map 10 
>             Map Operator Tree:
>                 TableScan
>                   alias: srcpart
>                   Statistics: Num rows: 1 Data size: 23248 Basic stats: PARTIAL Column
stats: NONE
>                   Select Operator
>                     expressions: ds (type: string)
>                     outputColumnNames: ds
>                     Statistics: Num rows: 1 Data size: 23248 Basic stats: PARTIAL Column
stats: NONE
>                     Group By Operator
>                       aggregations: max(ds)
>                       mode: hash
>                       outputColumnNames: _col0
>                       Statistics: Num rows: 1 Data size: 184 Basic stats: COMPLETE Column
stats: NONE
>                       Reduce Output Operator
>                         sort order: 
>                         Statistics: Num rows: 1 Data size: 184 Basic stats: COMPLETE
Column stats: NONE
>                         value expressions: _col0 (type: string)
>         Map 12 
>             Map Operator Tree:
>                 TableScan
>                   alias: srcpart
>                   Statistics: Num rows: 1 Data size: 23248 Basic stats: PARTIAL Column
stats: NONE
>                   Select Operator
>                     expressions: ds (type: string)
>                     outputColumnNames: ds
>                     Statistics: Num rows: 1 Data size: 23248 Basic stats: PARTIAL Column
stats: NONE
>                     Group By Operator
>                       aggregations: min(ds)
>                       mode: hash
>                       outputColumnNames: _col0
>                       Statistics: Num rows: 1 Data size: 184 Basic stats: COMPLETE Column
stats: NONE
>                       Reduce Output Operator
>                         sort order: 
>                         Statistics: Num rows: 1 Data size: 184 Basic stats: COMPLETE
Column stats: NONE
>                         value expressions: _col0 (type: string)
>         Reducer 11 
>             Reduce Operator Tree:
>               Group By Operator
>                 aggregations: max(VALUE._col0)
>                 mode: mergepartial
>                 outputColumnNames: _col0
>                 Statistics: Num rows: 1 Data size: 184 Basic stats: COMPLETE Column stats:
NONE
>                 Filter Operator
>                   predicate: _col0 is not null (type: boolean)
>                   Statistics: Num rows: 1 Data size: 184 Basic stats: COMPLETE Column
stats: NONE
>                   Group By Operator
>                     keys: _col0 (type: string)
>                     mode: hash
>                     outputColumnNames: _col0
>                     Statistics: Num rows: 2 Data size: 368 Basic stats: COMPLETE Column
stats: NONE
>                     Select Operator
>                       expressions: _col0 (type: string)
>                       outputColumnNames: _col0
>                       Statistics: Num rows: 2 Data size: 368 Basic stats: COMPLETE Column
stats: NONE
>                       Group By Operator
>                         keys: _col0 (type: string)
>                         mode: hash
>                         outputColumnNames: _col0
>                         Statistics: Num rows: 2 Data size: 368 Basic stats: COMPLETE
Column stats: NONE
>                         Spark Partition Pruning Sink Operator
>                           partition key expr: ds
>                           Statistics: Num rows: 2 Data size: 368 Basic stats: COMPLETE
Column stats: NONE
>                           target column name: ds
>                           target work: Map 1
>                     Select Operator
>                       expressions: _col0 (type: string)
>                       outputColumnNames: _col0
>                       Statistics: Num rows: 2 Data size: 368 Basic stats: COMPLETE Column
stats: NONE
>                       Group By Operator
>                         keys: _col0 (type: string)
>                         mode: hash
>                         outputColumnNames: _col0
>                         Statistics: Num rows: 2 Data size: 368 Basic stats: COMPLETE
Column stats: NONE
>                         Spark Partition Pruning Sink Operator
>                           partition key expr: ds
>                           Statistics: Num rows: 2 Data size: 368 Basic stats: COMPLETE
Column stats: NONE
>                           target column name: ds
>                           target work: Map 4
>         Reducer 13 
>             Reduce Operator Tree:
>               Group By Operator
>                 aggregations: min(VALUE._col0)
>                 mode: mergepartial
>                 outputColumnNames: _col0
>                 Statistics: Num rows: 1 Data size: 184 Basic stats: COMPLETE Column stats:
NONE
>                 Filter Operator
>                   predicate: _col0 is not null (type: boolean)
>                   Statistics: Num rows: 1 Data size: 184 Basic stats: COMPLETE Column
stats: NONE
>                   Group By Operator
>                     keys: _col0 (type: string)
>                     mode: hash
>                     outputColumnNames: _col0
>                     Statistics: Num rows: 2 Data size: 368 Basic stats: COMPLETE Column
stats: NONE
>                     Select Operator
>                       expressions: _col0 (type: string)
>                       outputColumnNames: _col0
>                       Statistics: Num rows: 2 Data size: 368 Basic stats: COMPLETE Column
stats: NONE
>                       Group By Operator
>                         keys: _col0 (type: string)
>                         mode: hash
>                         outputColumnNames: _col0
>                         Statistics: Num rows: 2 Data size: 368 Basic stats: COMPLETE
Column stats: NONE
>                         Spark Partition Pruning Sink Operator
>                           partition key expr: ds
>                           Statistics: Num rows: 2 Data size: 368 Basic stats: COMPLETE
Column stats: NONE
>                           target column name: ds
>                           target work: Map 1
>                     Select Operator
>                       expressions: _col0 (type: string)
>                       outputColumnNames: _col0
>                       Statistics: Num rows: 2 Data size: 368 Basic stats: COMPLETE Column
stats: NONE
>                       Group By Operator
>                         keys: _col0 (type: string)
>                         mode: hash
>                         outputColumnNames: _col0
>                         Statistics: Num rows: 2 Data size: 368 Basic stats: COMPLETE
Column stats: NONE
>                         Spark Partition Pruning Sink Operator
>                           partition key expr: ds
>                           Statistics: Num rows: 2 Data size: 368 Basic stats: COMPLETE
Column stats: NONE
>                           target column name: ds
>                           target work: Map 4
>   Stage: Stage-1
>     Spark
>       Edges:
>         Reducer 2 <- Map 1 (GROUP, 2)
>         Reducer 3 <- Reducer 2 (PARTITION-LEVEL SORT, 2), Reducer 2 (PARTITION-LEVEL
SORT, 2), Reducer 7 (PARTITION-LEVEL SORT, 2), Reducer 9 (PARTITION-LEVEL SORT, 2)
>         Reducer 7 <- Map 6 (GROUP, 1)
>         Reducer 9 <- Map 8 (GROUP, 1)
>       DagName: root_20170622231525_20a777e5-e659-4138-b605-65f8395e18e2:1
>       Vertices:
>         Map 1 
>             Map Operator Tree:
>                 TableScan
>                   alias: srcpart
>                   filterExpr: ds is not null (type: boolean)
>                   Statistics: Num rows: 1 Data size: 23248 Basic stats: PARTIAL Column
stats: NONE
>                   Group By Operator
>                     keys: ds (type: string)
>                     mode: hash
>                     outputColumnNames: _col0
>                     Statistics: Num rows: 1 Data size: 23248 Basic stats: COMPLETE Column
stats: NONE
>                     Reduce Output Operator
>                       key expressions: _col0 (type: string)
>                       sort order: +
>                       Map-reduce partition columns: _col0 (type: string)
>                       Statistics: Num rows: 1 Data size: 23248 Basic stats: COMPLETE
Column stats: NONE
>         Map 6 
>             Map Operator Tree:
>                 TableScan
>                   alias: srcpart
>                   Statistics: Num rows: 1 Data size: 23248 Basic stats: PARTIAL Column
stats: NONE
>                   Select Operator
>                     expressions: ds (type: string)
>                     outputColumnNames: ds
>                     Statistics: Num rows: 1 Data size: 23248 Basic stats: PARTIAL Column
stats: NONE
>                     Group By Operator
>                       aggregations: max(ds)
>                       mode: hash
>                       outputColumnNames: _col0
>                       Statistics: Num rows: 1 Data size: 184 Basic stats: COMPLETE Column
stats: NONE
>                       Reduce Output Operator
>                         sort order: 
>                         Statistics: Num rows: 1 Data size: 184 Basic stats: COMPLETE
Column stats: NONE
>                         value expressions: _col0 (type: string)
>         Map 8 
>             Map Operator Tree:
>                 TableScan
>                   alias: srcpart
>                   Statistics: Num rows: 1 Data size: 23248 Basic stats: PARTIAL Column
stats: NONE
>                   Select Operator
>                     expressions: ds (type: string)
>                     outputColumnNames: ds
>                     Statistics: Num rows: 1 Data size: 23248 Basic stats: PARTIAL Column
stats: NONE
>                     Group By Operator
>                       aggregations: min(ds)
>                       mode: hash
>                       outputColumnNames: _col0
>                       Statistics: Num rows: 1 Data size: 184 Basic stats: COMPLETE Column
stats: NONE
>                       Reduce Output Operator
>                         sort order: 
>                         Statistics: Num rows: 1 Data size: 184 Basic stats: COMPLETE
Column stats: NONE
>                         value expressions: _col0 (type: string)
>         Reducer 2 
>             Reduce Operator Tree:
>               Group By Operator
>                 keys: KEY._col0 (type: string)
>                 mode: mergepartial
>                 outputColumnNames: _col0
>                 Statistics: Num rows: 1 Data size: 23248 Basic stats: COMPLETE Column
stats: NONE
>                 Reduce Output Operator
>                   key expressions: _col0 (type: string)
>                   sort order: +
>                   Map-reduce partition columns: _col0 (type: string)
>                   Statistics: Num rows: 2 Data size: 46496 Basic stats: COMPLETE Column
stats: NONE
>         Reducer 3 
>             Reduce Operator Tree:
>               Join Operator
>                 condition map:
>                      Left Semi Join 0 to 1
>                 keys:
>                   0 _col0 (type: string)
>                   1 _col0 (type: string)
>                 outputColumnNames: _col0
>                 Statistics: Num rows: 2 Data size: 51145 Basic stats: COMPLETE Column
stats: NONE
>                 File Output Operator
>                   compressed: false
>                   Statistics: Num rows: 2 Data size: 51145 Basic stats: COMPLETE Column
stats: NONE
>                   table:
>                       input format: org.apache.hadoop.mapred.SequenceFileInputFormat
>                       output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
>                       serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
>         Reducer 7 
>             Reduce Operator Tree:
>               Group By Operator
>                 aggregations: max(VALUE._col0)
>                 mode: mergepartial
>                 outputColumnNames: _col0
>                 Statistics: Num rows: 1 Data size: 184 Basic stats: COMPLETE Column stats:
NONE
>                 Filter Operator
>                   predicate: _col0 is not null (type: boolean)
>                   Statistics: Num rows: 1 Data size: 184 Basic stats: COMPLETE Column
stats: NONE
>                   Group By Operator
>                     keys: _col0 (type: string)
>                     mode: hash
>                     outputColumnNames: _col0
>                     Statistics: Num rows: 2 Data size: 368 Basic stats: COMPLETE Column
stats: NONE
>                     Reduce Output Operator
>                       key expressions: _col0 (type: string)
>                       sort order: +
>                       Map-reduce partition columns: _col0 (type: string)
>                       Statistics: Num rows: 2 Data size: 368 Basic stats: COMPLETE Column
stats: NONE
>         Reducer 9 
>             Reduce Operator Tree:
>               Group By Operator
>                 aggregations: min(VALUE._col0)
>                 mode: mergepartial
>                 outputColumnNames: _col0
>                 Statistics: Num rows: 1 Data size: 184 Basic stats: COMPLETE Column stats:
NONE
>                 Filter Operator
>                   predicate: _col0 is not null (type: boolean)
>                   Statistics: Num rows: 1 Data size: 184 Basic stats: COMPLETE Column
stats: NONE
>                   Group By Operator
>                     keys: _col0 (type: string)
>                     mode: hash
>                     outputColumnNames: _col0
>                     Statistics: Num rows: 2 Data size: 368 Basic stats: COMPLETE Column
stats: NONE
>                     Reduce Output Operator
>                       key expressions: _col0 (type: string)
>                       sort order: +
>                       Map-reduce partition columns: _col0 (type: string)
>                       Statistics: Num rows: 2 Data size: 368 Basic stats: COMPLETE Column
stats: NONE
>   Stage: Stage-0
>     Fetch Operator
>       limit: -1
>       Processor Tree:
>         ListSink
> {code}
> the target work of Reducer11 and Reducer13 is Map4 , but Map4 does not exist in the explain




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