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https://issues.apache.org/jira/browse/HIVE-4106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13593767#comment-13593767
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Namit Jain commented on HIVE-4106:
----------------------------------
// check if the join operator encountered is a candidate for being converted
// to a sort-merge join
private NodeProcessor getCheckCandidateJoin() {
return new NodeProcessor() {
@Override
public Object process(Node nd, Stack<Node> stack, NodeProcessorCtx
procCtx,
Object... nodeOutputs) throws SemanticException {
SortBucketJoinProcCtx smbJoinContext = (SortBucketJoinProcCtx)procCtx;
JoinOperator joinOperator = (JoinOperator)nd;
int size = stack.size();
if (!(stack.get(size-1) instanceof JoinOperator) ||
!(stack.get(size-2) instanceof ReduceSinkOperator)) {
smbJoinContext.getRejectedJoinOps().add(joinOperator);
return null;
}
// If any operator in the stack does not support a auto-conversion,
this join should
// not be converted.
for (int pos = size -3; pos >= 0; pos--) {
Operator<? extends OperatorDesc> op = (Operator<? extends
OperatorDesc>)stack.get(pos);
if (!op.supportAutomaticSortMergeJoin()) {
smbJoinContext.getRejectedJoinOps().add(joinOperator);
return null;
}
}
return null;
}
};
}
It should be done above - file SortedMergeBucketMapJoinOptimizer.java.
Can you try your testcase, and see if it being added to rejectJoinOps ?
> SMB joins fail in multi-way joins
> ---------------------------------
>
> Key: HIVE-4106
> URL: https://issues.apache.org/jira/browse/HIVE-4106
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Affects Versions: 0.11.0
> Reporter: Vikram Dixit K
> Assignee: Vikram Dixit K
> Attachments: HIVE-4106.patch
>
>
> I see array out of bounds exception in case of multi way smb joins. This is
> related to changes that went in as part of HIVE-3403. This issue has been
> discussed in HIVE-3891.
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