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https://issues.apache.org/jira/browse/HIVE-24761?focusedWorklogId=585550&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-585550
]
ASF GitHub Bot logged work on HIVE-24761:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 20/Apr/21 04:26
Start Date: 20/Apr/21 04:26
Worklog Time Spent: 10m
Work Description: ramesh0201 commented on a change in pull request #2099:
URL: https://github.com/apache/hive/pull/2099#discussion_r616334377
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/optimizer/physical/Vectorizer.java
##########
@@ -3005,6 +3003,19 @@ private boolean validatePTFOperator(PTFOperator op,
VectorizationContext vContex
}
}
}
+ if (vectorPTFDesc.getOrderExprNodeDescs().length > 1) {
+ /*
+ * Currently, we need to rule out here all cases where a range
boundary scanner can run,
+ * basically: 1. bounded start 2. bounded end which is not current row
+ */
+ if (windowFrameDef.getWindowType() == WindowType.RANGE
+ && (!windowFrameDef.isStartUnbounded() ||
!windowFrameDef.getEnd().isCurrentRow())) {
Review comment:
I am not much aware of the range boundary scanner, but do we have any
issue vectorizing UNBOUNDED FOLLOWING? Can you help me understand how does
range boundary scanner affects the vectorization
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Issue Time Tracking
-------------------
Worklog Id: (was: 585550)
Time Spent: 20m (was: 10m)
> Vectorization: Support PTF - bounded start windows
> --------------------------------------------------
>
> Key: HIVE-24761
> URL: https://issues.apache.org/jira/browse/HIVE-24761
> Project: Hive
> Issue Type: Sub-task
> Reporter: László Bodor
> Assignee: László Bodor
> Priority: Major
> Labels: pull-request-available
> Time Spent: 20m
> Remaining Estimate: 0h
>
> {code}
> notVectorizedReason: PTF operator: *** only UNBOUNDED start frame is
> supported
> {code}
> Currently, bounded windows are not supported in VectorPTFOperator. If we
> simply remove the check compile-time:
> https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/optimizer/physical/Vectorizer.java#L2911
> {code}
> if (!windowFrameDef.isStartUnbounded()) {
> setOperatorIssue(functionName + " only UNBOUNDED start frame is
> supported");
> return false;
> }
> {code}
> We get incorrect results, that's because vectorized codepath completely
> ignores boundaries, and simply iterates through all the input batches in
> [VectorPTFGroupBatches|https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/exec/vector/ptf/VectorPTFGroupBatches.java#L172]:
> {code}
> for (VectorPTFEvaluatorBase evaluator : evaluators) {
> evaluator.evaluateGroupBatch(batch);
> if (isLastGroupBatch) {
> evaluator.doLastBatchWork();
> }
> }
> {code}
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