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https://issues.apache.org/jira/browse/DRILL-6123?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16359154#comment-16359154
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ASF GitHub Bot commented on DRILL-6123:
---------------------------------------
Github user ppadma commented on a diff in the pull request:
https://github.com/apache/drill/pull/1107#discussion_r167380394
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/spill/RecordBatchSizer.java
---
@@ -137,10 +137,10 @@ public ColumnSize(ValueVector v, String prefix) {
case MAP:
case UNION:
// No standard size for Union type
- dataSize = v.getPayloadByteCount(valueCount);
+ dataSize = valueCount == 0 ? 0 : v.getPayloadByteCount(valueCount);
--- End diff --
When we get empty batch, getPayloadByteCount will throw out of bounds
exception if the underlying method tries to read the value vector for index 0
i.e. when it is trying to read offset vector. I added the check in those
methods and removed here.
I still have to retain the check here for the case when we are trying to
read the offset vector.
> Limit batch size for Merge Join based on memory
> -----------------------------------------------
>
> Key: DRILL-6123
> URL: https://issues.apache.org/jira/browse/DRILL-6123
> Project: Apache Drill
> Issue Type: Improvement
> Components: Execution - Flow
> Affects Versions: 1.12.0
> Reporter: Padma Penumarthy
> Assignee: Padma Penumarthy
> Priority: Major
> Fix For: 1.13.0
>
>
> Merge join limits output batch size to 32K rows irrespective of row size.
> This can create very large or very small batches (in terms of memory),
> depending upon average row width. Change this to figure out output row count
> based on memory specified with the new outputBatchSize option and average row
> width of incoming left and right batches. Output row count will be minimum of
> 1 and max of 64k.
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