Krisztian Kasa created HIVE-28729:
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Summary: Apply nulls order setting in Reduce Sink operator of join
branches
Key: HIVE-28729
URL: https://issues.apache.org/jira/browse/HIVE-28729
Project: Hive
Issue Type: Sub-task
Reporter: Krisztian Kasa
{code:java}
set hive.default.nulls.last=false;
create table t1(key int, value string);
EXPLAIN SELECT sum(hash(a.key,a.value,b.key,b.value)) FROM t1 a INNER JOIN t1 b
on a.key = b.key;
{code}
{code:java}
STAGE DEPENDENCIES:
Stage-1 is a root stage
Stage-0 depends on stages: Stage-1
STAGE PLANS:
Stage: Stage-1
Tez
#### A masked pattern was here ####
Edges:
Reducer 2 <- Map 1 (SIMPLE_EDGE), Map 4 (SIMPLE_EDGE)
Reducer 3 <- Reducer 2 (CUSTOM_SIMPLE_EDGE)
#### A masked pattern was here ####
Vertices:
Map 1
Map Operator Tree:
TableScan
alias: a
filterExpr: key is not null (type: boolean)
Statistics: Num rows: 1 Data size: 188 Basic stats: COMPLETE
Column stats: NONE
Filter Operator
predicate: key is not null (type: boolean)
Statistics: Num rows: 1 Data size: 188 Basic stats:
COMPLETE Column stats: NONE
Select Operator
expressions: key (type: int), value (type: string)
outputColumnNames: key, value
Statistics: Num rows: 1 Data size: 188 Basic stats:
COMPLETE Column stats: NONE
Reduce Output Operator
key expressions: key (type: int)
null sort order: z
sort order: +
Map-reduce partition columns: key (type: int)
Statistics: Num rows: 1 Data size: 188 Basic stats:
COMPLETE Column stats: NONE
value expressions: value (type: string)
Execution mode: vectorized, llap
LLAP IO: all inputs
Map 4
Map Operator Tree:
TableScan
alias: b
filterExpr: key is not null (type: boolean)
Statistics: Num rows: 1 Data size: 188 Basic stats: COMPLETE
Column stats: NONE
Filter Operator
predicate: key is not null (type: boolean)
Statistics: Num rows: 1 Data size: 188 Basic stats:
COMPLETE Column stats: NONE
Select Operator
expressions: key (type: int), value (type: string)
outputColumnNames: key, value
Statistics: Num rows: 1 Data size: 188 Basic stats:
COMPLETE Column stats: NONE
Reduce Output Operator
key expressions: key (type: int)
null sort order: z
sort order: +
Map-reduce partition columns: key (type: int)
Statistics: Num rows: 1 Data size: 188 Basic stats:
COMPLETE Column stats: NONE
value expressions: value (type: string)
Execution mode: vectorized, llap
LLAP IO: all inputs
Reducer 2
Execution mode: llap
Reduce Operator Tree:
Merge Join Operator
condition map:
Inner Join 0 to 1
keys:
0 key (type: int)
1 key (type: int)
outputColumnNames: key, value, key0, value0
Statistics: Num rows: 1 Data size: 206 Basic stats: COMPLETE
Column stats: NONE
Select Operator
expressions: hash(key,value,key0,value0) (type: int)
outputColumnNames: $f0
Statistics: Num rows: 1 Data size: 206 Basic stats: COMPLETE
Column stats: NONE
Group By Operator
aggregations: sum($f0)
minReductionHashAggr: 0.99
mode: hash
outputColumnNames: _col0
Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE
Column stats: NONE
Reduce Output Operator
null sort order:
sort order:
Statistics: Num rows: 1 Data size: 8 Basic stats:
COMPLETE Column stats: NONE
value expressions: _col0 (type: bigint)
Reducer 3
Execution mode: vectorized, llap
Reduce Operator Tree:
Group By Operator
aggregations: sum(VALUE._col0)
mode: mergepartial
outputColumnNames: $f0
Statistics: Num rows: 1 Data size: 16 Basic stats: COMPLETE
Column stats: NONE
File Output Operator
compressed: false
Statistics: Num rows: 1 Data size: 16 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
Stage: Stage-0
Fetch Operator
limit: -1
Processor Tree:
ListSink
{code}
Nulls order in RS operators are NULLS LAST but is should be NULLS FIRST because
of the config {{hive.default.nulls.last=false}}
{code}
Map 1
Map Operator Tree:
...
Reduce Output Operator
key expressions: key (type: int)
null sort order: z
...
{code}
{code}
Map 4
Map Operator Tree:
...
Reduce Output Operator
key expressions: key (type: int)
null sort order: z
...
{code}
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