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https://issues.apache.org/jira/browse/HIVE-13082?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15163759#comment-15163759
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Chaoyu Tang commented on HIVE-13082:
------------------------------------
[~gopalv] I wonder if you were saying that a cross-product should not be
generated for a left semi join, otherwise, the query should be invalidated (or
corrected, or failed)? It seems that HIVE-12477 you linked was trying to solve
the case where the predicate 1=1 lead to a cross-product in semi join. Is it
right?
> Enable constant propagation optimization in query with left semi join
> ---------------------------------------------------------------------
>
> Key: HIVE-13082
> URL: https://issues.apache.org/jira/browse/HIVE-13082
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Affects Versions: 2.0.0
> Reporter: Chaoyu Tang
> Assignee: Chaoyu Tang
> Fix For: 1.3.0, 2.1.0
>
> Attachments: HIVE-13082.1.patch, HIVE-13082.2.patch,
> HIVE-13082.3.patch, HIVE-13082.branch-1.patch, HIVE-13082.patch
>
>
> Currently constant folding is only allowed for inner or unique join, I think
> it is also applicable and allowed for left semi join. Otherwise the query
> like following having multiple joins with left semi joins will fail:
> {code}
> select table1.id, table1.val, table2.val2 from table1 inner join table2 on
> table1.val = 't1val01' and table1.id = table2.id left semi join table3 on
> table1.dimid = table3.id;
> {code}
> with errors:
> {code}
> java.lang.Exception: java.lang.RuntimeException: Error in configuring object
> at
> org.apache.hadoop.mapred.LocalJobRunner$Job.runTasks(LocalJobRunner.java:462)
> ~[hadoop-mapreduce-client-common-2.6.0.jar:?]
> at
> org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:522)
> [hadoop-mapreduce-client-common-2.6.0.jar:?]
> Caused by: java.lang.RuntimeException: Error in configuring object
> at
> org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:109)
> ~[hadoop-common-2.6.0.jar:?]
> at
> org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:75)
> ~[hadoop-common-2.6.0.jar:?]
> at
> org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)
> ~[hadoop-common-2.6.0.jar:?]
> at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:446)
> ~[hadoop-mapreduce-client-core-2.6.0.jar:?]
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
> ~[hadoop-mapreduce-client-core-2.6.0.jar:?]
> at
> org.apache.hadoop.mapred.LocalJobRunner$Job$MapTaskRunnable.run(LocalJobRunner.java:243)
> ~[hadoop-mapreduce-client-common-2.6.0.jar:?]
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
> ~[?:1.7.0_45]
> at java.util.concurrent.FutureTask.run(FutureTask.java:262)
> ~[?:1.7.0_45]
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> ~[?:1.7.0_45]
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> ~[?:1.7.0_45]
> at java.lang.Thread.run(Thread.java:744) ~[?:1.7.0_45]
> ...
> Caused by: java.lang.IndexOutOfBoundsException: Index: 3, Size: 3
> at java.util.ArrayList.rangeCheck(ArrayList.java:635) ~[?:1.7.0_45]
> at java.util.ArrayList.get(ArrayList.java:411) ~[?:1.7.0_45]
> at
> org.apache.hadoop.hive.serde2.objectinspector.StandardStructObjectInspector.init(StandardStructObjectInspector.java:118)
> ~[hive-exec-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
> at
> org.apache.hadoop.hive.serde2.objectinspector.StandardStructObjectInspector.<init>(StandardStructObjectInspector.java:109)
> ~[hive-exec-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
> at
> org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorFactory.getStandardStructObjectInspector(ObjectInspectorFactory.java:326)
> ~[hive-exec-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
> at
> org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorFactory.getStandardStructObjectInspector(ObjectInspectorFactory.java:311)
> ~[hive-exec-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
> at
> org.apache.hadoop.hive.ql.exec.CommonJoinOperator.getJoinOutputObjectInspector(CommonJoinOperator.java:181)
> ~[hive-exec-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
> at
> org.apache.hadoop.hive.ql.exec.CommonJoinOperator.initializeOp(CommonJoinOperator.java:319)
> ~[hive-exec-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
> at
> org.apache.hadoop.hive.ql.exec.AbstractMapJoinOperator.initializeOp(AbstractMapJoinOperator.java:78)
> ~[hive-exec-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
> at
> org.apache.hadoop.hive.ql.exec.MapJoinOperator.initializeOp(MapJoinOperator.java:138)
> ~[hive-exec-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
> at
> org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:355)
> ~[hive-exec-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
> at
> org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:504)
> ~[hive-exec-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
> {code}
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