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https://issues.apache.org/jira/browse/SOLR-8420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15107737#comment-15107737
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Tomás Fernández Löbbe commented on SOLR-8420:
---------------------------------------------
bq. I wonder if DateStatsValues's private long sum = 0; might perhaps become
double also (similar to NumericStatsValues's sum being a double already).
Yes, I think it should. This should also change the output, currently it's a
date like:
{code:xml}
<date name="sum">122366-06-12T21:06:06Z</date>
{code}
> Date statistics: sumOfSquares overflows long
> --------------------------------------------
>
> Key: SOLR-8420
> URL: https://issues.apache.org/jira/browse/SOLR-8420
> Project: Solr
> Issue Type: Bug
> Components: SearchComponents - other
> Affects Versions: 5.4
> Reporter: Tom Hill
> Priority: Minor
> Attachments: 0001-Fix-overflow-in-date-statistics.patch,
> 0001-Fix-overflow-in-date-statistics.patch, StdDev.java
>
>
> The values for Dates are large enough that squaring them overflows a "long"
> field. This should be converted to a double.
> StatsValuesFactory.java, line 755 DateStatsValues#updateTypeSpecificStats Add
> a cast to double
> sumOfSquares += ( (double)value * value * count);
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