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https://issues.apache.org/jira/browse/BEAM-7013?focusedWorklogId=309035&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-309035
]
ASF GitHub Bot logged work on BEAM-7013:
----------------------------------------
Author: ASF GitHub Bot
Created on: 09/Sep/19 16:22
Start Date: 09/Sep/19 16:22
Worklog Time Spent: 10m
Work Description: zfraa commented on pull request #9519: [BEAM-7013] Use
a 0-length byte array to represent empty sketch in HllCount
URL: https://github.com/apache/beam/pull/9519#discussion_r322333589
##########
File path:
sdks/java/extensions/zetasketch/src/main/java/org/apache/beam/sdk/extensions/zetasketch/HllCountMergePartialFn.java
##########
@@ -94,9 +99,9 @@ private HllCountMergePartialFn() {}
@Override
public byte[] extractOutput(@Nullable HyperLogLogPlusPlus<HllT> accumulator)
{
if (accumulator == null) {
- throw new IllegalStateException(
- "HllCountMergePartialFn.extractOutput() should not be called on a
null accumulator.");
+ return new byte[0];
Review comment:
We don't need a defaultValue() implementation in this class because the
accumulator is different and can encode "we haven't seen any input yet..." --
correct? (Ideally, we'd have more symmetry between Init and MergePartial, but
that's a detail).
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Issue Time Tracking
-------------------
Worklog Id: (was: 309035)
> A new count distinct transform based on BigQuery compatible HyperLogLog++
> implementation
> ----------------------------------------------------------------------------------------
>
> Key: BEAM-7013
> URL: https://issues.apache.org/jira/browse/BEAM-7013
> Project: Beam
> Issue Type: New Feature
> Components: extensions-java-sketching, sdk-java-core
> Reporter: Yueyang Qiu
> Assignee: Yueyang Qiu
> Priority: Major
> Fix For: 2.16.0
>
> Time Spent: 30h
> Remaining Estimate: 0h
>
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