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https://issues.apache.org/jira/browse/HIVE-16948?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16104374#comment-16104374
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Rui Li commented on HIVE-16948:
-------------------------------
[~kellyzly], I'm not talking about the 3 places. Here's an example:
{noformat}
set hive.cbo.enable=false;
explain select * from (select srcpart.ds,srcpart.key from srcpart join src on
srcpart.ds=src.key) a join (select srcpart.ds,srcpart.key from srcpart join src
on srcpart.ds=src.key) b on a.key=b.key;
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
DagName: lirui_20170728110559_4c2bc0ba-ab9a-428b-bf09-23f1b19b068f:16
Vertices:
Map 8
Map Operator Tree:
TableScan
alias: src
Statistics: Num rows: 58 Data size: 5812 Basic stats:
COMPLETE Column stats: NONE
Filter Operator
predicate: key is not null (type: boolean)
Statistics: Num rows: 58 Data size: 5812 Basic stats:
COMPLETE Column stats: NONE
Select Operator
expressions: key (type: string)
outputColumnNames: _col0
Statistics: Num rows: 58 Data size: 5812 Basic stats:
COMPLETE Column stats: NONE
Group By Operator
keys: _col0 (type: string)
mode: hash
outputColumnNames: _col0
Statistics: Num rows: 58 Data size: 5812 Basic stats:
COMPLETE Column stats: NONE
Spark Partition Pruning Sink Operator
partition key expr: ds
Statistics: Num rows: 58 Data size: 5812 Basic stats:
COMPLETE Column stats: NONE
target column name: ds
target work: Map 1
Execution mode: vectorized
Map 9
Map Operator Tree:
TableScan
alias: src
Statistics: Num rows: 58 Data size: 5812 Basic stats:
COMPLETE Column stats: NONE
Filter Operator
predicate: key is not null (type: boolean)
Statistics: Num rows: 58 Data size: 5812 Basic stats:
COMPLETE Column stats: NONE
Select Operator
expressions: key (type: string)
outputColumnNames: _col0
Statistics: Num rows: 58 Data size: 5812 Basic stats:
COMPLETE Column stats: NONE
Group By Operator
keys: _col0 (type: string)
mode: hash
outputColumnNames: _col0
Statistics: Num rows: 58 Data size: 5812 Basic stats:
COMPLETE Column stats: NONE
Spark Partition Pruning Sink Operator
partition key expr: ds
Statistics: Num rows: 58 Data size: 5812 Basic stats:
COMPLETE Column stats: NONE
target column name: ds
target work: Map 5
Execution mode: vectorized
Stage: Stage-1
Spark
Edges:
Reducer 2 <- Map 1 (PARTITION-LEVEL SORT, 1), Map 4 (PARTITION-LEVEL
SORT, 1)
Reducer 3 <- Reducer 2 (PARTITION-LEVEL SORT, 1), Reducer 6
(PARTITION-LEVEL SORT, 1)
Reducer 6 <- Map 1 (PARTITION-LEVEL SORT, 1), Map 4 (PARTITION-LEVEL
SORT, 1)
DagName: lirui_20170728110559_4c2bc0ba-ab9a-428b-bf09-23f1b19b068f:15
Vertices:
Map 1
Map Operator Tree:
TableScan
alias: srcpart
Statistics: Num rows: 2000 Data size: 21248 Basic stats:
COMPLETE Column stats: NONE
Filter Operator
predicate: key is not null (type: boolean)
Statistics: Num rows: 2000 Data size: 21248 Basic stats:
COMPLETE Column stats: NONE
Reduce Output Operator
key expressions: ds (type: string)
sort order: +
Map-reduce partition columns: ds (type: string)
Statistics: Num rows: 2000 Data size: 21248 Basic stats:
COMPLETE Column stats: NONE
value expressions: key (type: string)
Execution mode: vectorized
Map 4
Map Operator Tree:
TableScan
alias: src
Statistics: Num rows: 58 Data size: 5812 Basic stats:
COMPLETE Column stats: NONE
Filter Operator
predicate: key is not null (type: boolean)
Statistics: Num rows: 58 Data size: 5812 Basic stats:
COMPLETE Column stats: NONE
Reduce Output Operator
key expressions: key (type: string)
sort order: +
Map-reduce partition columns: key (type: string)
Statistics: Num rows: 58 Data size: 5812 Basic stats:
COMPLETE Column stats: NONE
Execution mode: vectorized
Reducer 2
Reduce Operator Tree:
Join Operator
condition map:
Inner Join 0 to 1
keys:
0 ds (type: string)
1 key (type: string)
outputColumnNames: _col0, _col2
Statistics: Num rows: 2200 Data size: 23372 Basic stats:
COMPLETE Column stats: NONE
Select Operator
expressions: _col2 (type: string), _col0 (type: string)
outputColumnNames: _col0, _col1
Statistics: Num rows: 2200 Data size: 23372 Basic stats:
COMPLETE Column stats: NONE
Reduce Output Operator
key expressions: _col1 (type: string)
sort order: +
Map-reduce partition columns: _col1 (type: string)
Statistics: Num rows: 2200 Data size: 23372 Basic stats:
COMPLETE Column stats: NONE
value expressions: _col0 (type: string)
Reducer 3
Reduce Operator Tree:
Join Operator
condition map:
Inner Join 0 to 1
keys:
0 _col1 (type: string)
1 _col1 (type: string)
outputColumnNames: _col0, _col1, _col2, _col3
Statistics: Num rows: 2420 Data size: 25709 Basic stats:
COMPLETE Column stats: NONE
File Output Operator
compressed: false
Statistics: Num rows: 2420 Data size: 25709 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 6
Reduce Operator Tree:
Join Operator
condition map:
Inner Join 0 to 1
keys:
0 ds (type: string)
1 key (type: string)
outputColumnNames: _col0, _col2
Statistics: Num rows: 2200 Data size: 23372 Basic stats:
COMPLETE Column stats: NONE
Select Operator
expressions: _col2 (type: string), _col0 (type: string)
outputColumnNames: _col0, _col1
Statistics: Num rows: 2200 Data size: 23372 Basic stats:
COMPLETE Column stats: NONE
Reduce Output Operator
key expressions: _col1 (type: string)
sort order: +
Map-reduce partition columns: _col1 (type: string)
Statistics: Num rows: 2200 Data size: 23372 Basic stats:
COMPLETE Column stats: NONE
value expressions: _col0 (type: string)
{noformat}
Map1 and Map5 are equivalent and Map5 is removed. Therefore the whole Map9
should be removed. But I think your patch won't work because Map9 doesn't have
branches.
> 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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