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Posted to issues@hive.apache.org by "Chengxiang Li (JIRA)" <ji...@apache.org> on 2016/01/12 08:43:39 UTC
[jira] [Updated] (HIVE-12736) It seems that result of Hive on Spark
be mistaken and result of Hive and Hive on Spark are not the same
[ https://issues.apache.org/jira/browse/HIVE-12736?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Chengxiang Li updated HIVE-12736:
---------------------------------
Attachment: HIVE-12736.1-spark.patch
{{SparkMapJoinProcessor}} miss some validation during {{convertMapJoin}}, for Spark mode, the query should work the same way as MR.
> It seems that result of Hive on Spark be mistaken and result of Hive and Hive on Spark are not the same
> -------------------------------------------------------------------------------------------------------
>
> Key: HIVE-12736
> URL: https://issues.apache.org/jira/browse/HIVE-12736
> Project: Hive
> Issue Type: Bug
> Affects Versions: 1.1.1, 1.2.1
> Reporter: JoneZhang
> Assignee: Chengxiang Li
> Attachments: HIVE-12736.1-spark.patch
>
>
> select * from staff;
> 1 jone 22 1
> 2 lucy 21 1
> 3 hmm 22 2
> 4 james 24 3
> 5 xiaoliu 23 3
> select id,date_ from trade union all select id,"test" from trade ;
> 1 201510210908
> 2 201509080234
> 2 201509080235
> 1 test
> 2 test
> 2 test
> set hive.execution.engine=spark;
> set spark.master=local;
> select /*+mapjoin(t)*/ * from staff s join
> (select id,date_ from trade union all select id,"test" from trade ) t on s.id=t.id;
> 1 jone 22 1 1 201510210908
> 2 lucy 21 1 2 201509080234
> 2 lucy 21 1 2 201509080235
> set hive.execution.engine=mr;
> select /*+mapjoin(t)*/ * from staff s join
> (select id,date_ from trade union all select id,"test" from trade ) t on s.id=t.id;
> FAILED: SemanticException [Error 10227]: Not all clauses are supported with mapjoin hint. Please remove mapjoin hint.
> I have two questions
> 1.Why result of hive on spark not include the following record?
> 1 jone 22 1 1 test
> 2 lucy 21 1 2 test
> 2 lucy 21 1 2 test
> 2.Why there are two different ways of dealing same query?
> explain 1:
> set hive.execution.engine=spark;
> set spark.master=local;
> explain
> select id,date_ from trade union all select id,"test" from trade;
> OK
> STAGE DEPENDENCIES:
> Stage-1 is a root stage
> Stage-0 depends on stages: Stage-1
> STAGE PLANS:
> Stage: Stage-1
> Spark
> DagName: jonezhang_20151222191643_5301d90a-caf0-4934-8092-d165c87a4190:1
> Vertices:
> Map 1
> Map Operator Tree:
> TableScan
> alias: trade
> Statistics: Num rows: 6 Data size: 48 Basic stats: COMPLETE Column stats: NONE
> Select Operator
> expressions: id (type: int), date_ (type: string)
> outputColumnNames: _col0, _col1
> Statistics: Num rows: 6 Data size: 48 Basic stats: COMPLETE Column stats: NONE
> File Output Operator
> compressed: false
> Statistics: Num rows: 12 Data size: 96 Basic stats: COMPLETE Column stats: NONE
> table:
> input format: org.apache.hadoop.mapred.TextInputFormat
> output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
> serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
> Map 2
> Map Operator Tree:
> TableScan
> alias: trade
> Statistics: Num rows: 6 Data size: 48 Basic stats: COMPLETE Column stats: NONE
> Select Operator
> expressions: id (type: int), 'test' (type: string)
> outputColumnNames: _col0, _col1
> Statistics: Num rows: 6 Data size: 48 Basic stats: COMPLETE Column stats: NONE
> File Output Operator
> compressed: false
> Statistics: Num rows: 12 Data size: 96 Basic stats: COMPLETE Column stats: NONE
> table:
> input format: org.apache.hadoop.mapred.TextInputFormat
> output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
> serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
> Stage: Stage-0
> Fetch Operator
> limit: -1
> Processor Tree:
> ListSink
> explain 2:
> set hive.execution.engine=spark;
> set spark.master=local;
> explain
> select /*+mapjoin(t)*/ * from staff s join
> (select id,date_ from trade union all select id,"test" from trade ) t on s.id=t.id;
> OK
> 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: jonezhang_20151222191716_be7eac84-b5b6-4478-b88f-9f59e2b1b1a8:3
> Vertices:
> Map 1
> Map Operator Tree:
> TableScan
> alias: trade
> Statistics: Num rows: 6 Data size: 48 Basic stats: COMPLETE Column stats: NONE
> Filter Operator
> predicate: id is not null (type: boolean)
> Statistics: Num rows: 3 Data size: 24 Basic stats: COMPLETE Column stats: NONE
> Select Operator
> expressions: id (type: int), date_ (type: string)
> outputColumnNames: _col0, _col1
> Statistics: Num rows: 3 Data size: 24 Basic stats: COMPLETE Column stats: NONE
> Spark HashTable Sink Operator
> keys:
> 0 id (type: int)
> 1 _col0 (type: int)
> Local Work:
> Map Reduce Local Work
> Stage: Stage-1
> Spark
> DagName: jonezhang_20151222191716_be7eac84-b5b6-4478-b88f-9f59e2b1b1a8:2
> Vertices:
> Map 2
> Map Operator Tree:
> TableScan
> alias: s
> Statistics: Num rows: 1 Data size: 66 Basic stats: COMPLETE Column stats: NONE
> Filter Operator
> predicate: id is not null (type: boolean)
> Statistics: Num rows: 1 Data size: 66 Basic stats: COMPLETE Column stats: NONE
> Map Join Operator
> condition map:
> Inner Join 0 to 1
> keys:
> 0 id (type: int)
> 1 _col0 (type: int)
> outputColumnNames: _col0, _col1, _col2, _col3, _col7, _col8
> input vertices:
> 1 Map 1
> Statistics: Num rows: 6 Data size: 52 Basic stats: COMPLETE Column stats: NONE
> Select Operator
> expressions: _col0 (type: int), _col1 (type: string), _col2 (type: int), _col3 (type: int), _col7 (type: int), _col8 (type: string)
> outputColumnNames: _col0, _col1, _col2, _col3, _col4, _col5
> Statistics: Num rows: 6 Data size: 52 Basic stats: COMPLETE Column stats: NONE
> File Output Operator
> compressed: false
> Statistics: Num rows: 6 Data size: 52 Basic stats: COMPLETE Column stats: NONE
> table:
> input format: org.apache.hadoop.mapred.TextInputFormat
> output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
> serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
> Local Work:
> Map Reduce Local Work
> Stage: Stage-0
> Fetch Operator
> limit: -1
> Processor Tree:
> ListSink
> I can't find any information about union "test" in explain 2.
> Some properties on hive-site.xml is
> <property>
> <name>hive.ignore.mapjoin.hint</name>
> <value>false</value>
> </property>
> <property>
> <name>hive.auto.convert.join</name>
> <value>true</value>
> </property>
> <property>
> <name>hive.auto.convert.join.noconditionaltask</name>
> <value>true</value>
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