Alexander Block created SOLR-6430:
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Summary: Date sort order for null and dates < 1970 is wrong
Key: SOLR-6430
URL: https://issues.apache.org/jira/browse/SOLR-6430
Project: Solr
Issue Type: Bug
Affects Versions: 4.9
Reporter: Alexander Block
I have a date field as follows:
<field name="ETD" type="date" indexed="true" stored="true" multiValued="false"
/>
...
<fieldType name="date" class="solr.TrieDateField" precisionStep="0"
positionIncrementGap="0"/>
In my data set I have unset fields (null), dates which are pre EPOCH (e.g.
1930-02-13T23:00:00Z) and dates which are post EPOCH (e.g.
2000-12-31T23:00:00Z). When sorting in ascending order, I would expect the null
fields to be considered the ones with the lowest values, for example:
null
1930-02-13T23:00:00Z
2000-12-31T23:00:00Z
What I get however is:
1930-02-13T23:00:00Z
null
2000-12-31T23:00:00Z
It looks like null is not handled as the lowest possible value for a date field.
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