Sahil Takiar created HIVE-17414:
-----------------------------------
Summary: HoS DPP + Vectorization generates invalid explain plan
due to CombineEquivalentWorkResolver
Key: HIVE-17414
URL: https://issues.apache.org/jira/browse/HIVE-17414
Project: Hive
Issue Type: Sub-task
Components: Spark
Reporter: Sahil Takiar
Similar to HIVE-16948, the following query generates an invalid explain plan
when HoS DPP is enabled + vectorization:
{code:sql}
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 Plan:
{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)
#### A masked pattern was here ####
Vertices:
Map 10
Map Operator Tree:
TableScan
alias: srcpart
Statistics: Num rows: 2000 Data size: 21248 Basic stats:
COMPLETE Column stats: NONE
Select Operator
expressions: ds (type: string)
outputColumnNames: ds
Statistics: Num rows: 2000 Data size: 21248 Basic stats:
COMPLETE 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)
Execution mode: vectorized
Map 12
Map Operator Tree:
TableScan
alias: srcpart
Statistics: Num rows: 2000 Data size: 21248 Basic stats:
COMPLETE Column stats: NONE
Select Operator
expressions: ds (type: string)
outputColumnNames: ds
Statistics: Num rows: 2000 Data size: 21248 Basic stats:
COMPLETE 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)
Execution mode: vectorized
Reducer 11
Execution mode: vectorized
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
Target column: ds (string)
partition key expr: ds
Statistics: Num rows: 2 Data size: 368 Basic stats:
COMPLETE Column stats: NONE
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
Target column: ds (string)
partition key expr: ds
Statistics: Num rows: 2 Data size: 368 Basic stats:
COMPLETE Column stats: NONE
target work: Map 4
Reducer 13
Execution mode: vectorized
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
Target column: ds (string)
partition key expr: ds
Statistics: Num rows: 2 Data size: 368 Basic stats:
COMPLETE Column stats: NONE
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
Target column: ds (string)
partition key expr: ds
Statistics: Num rows: 2 Data size: 368 Basic stats:
COMPLETE Column stats: NONE
target work: Map 4
Stage: Stage-1
Spark
Edges:
Reducer 2 <- Map 1 (GROUP, 4)
Reducer 3 <- Reducer 2 (PARTITION-LEVEL SORT, 4), Reducer 2
(PARTITION-LEVEL SORT, 4), Reducer 7 (PARTITION-LEVEL SORT, 4), Reducer 9
(PARTITION-LEVEL SORT, 4)
Reducer 7 <- Map 6 (GROUP, 1)
Reducer 9 <- Map 8 (GROUP, 1)
#### A masked pattern was here ####
Vertices:
Map 1
Map Operator Tree:
TableScan
alias: srcpart
filterExpr: ds is not null (type: boolean)
Statistics: Num rows: 2000 Data size: 21248 Basic stats:
COMPLETE Column stats: NONE
Group By Operator
keys: ds (type: string)
mode: hash
outputColumnNames: _col0
Statistics: Num rows: 2000 Data size: 21248 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: 2000 Data size: 21248 Basic stats:
COMPLETE Column stats: NONE
Execution mode: vectorized
Map 6
Map Operator Tree:
TableScan
alias: srcpart
Statistics: Num rows: 2000 Data size: 21248 Basic stats:
COMPLETE Column stats: NONE
Select Operator
expressions: ds (type: string)
outputColumnNames: ds
Statistics: Num rows: 2000 Data size: 21248 Basic stats:
COMPLETE 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)
Execution mode: vectorized
Map 8
Map Operator Tree:
TableScan
alias: srcpart
Statistics: Num rows: 2000 Data size: 21248 Basic stats:
COMPLETE Column stats: NONE
Select Operator
expressions: ds (type: string)
outputColumnNames: ds
Statistics: Num rows: 2000 Data size: 21248 Basic stats:
COMPLETE 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)
Execution mode: vectorized
Reducer 2
Execution mode: vectorized
Reduce Operator Tree:
Group By Operator
keys: KEY._col0 (type: string)
mode: mergepartial
outputColumnNames: _col0
Statistics: Num rows: 1000 Data size: 10624 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: 2000 Data size: 21248 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: 2200 Data size: 23372 Basic stats:
COMPLETE Column stats: NONE
File Output Operator
compressed: false
Statistics: Num rows: 2200 Data size: 23372 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
Execution mode: vectorized
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
Execution mode: vectorized
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}
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