StatsComponent should support hierarchical facets
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Key: SOLR-2472
URL: https://issues.apache.org/jira/browse/SOLR-2472
Project: Solr
Issue Type: New Feature
Affects Versions: 3.1
Reporter: Dmitry Drozdov
It is currently possible to get only single layer of faceting in StatsComponent.
The proposal is it make it possible to specify stats.facet parameter like this:
&stats=true&stats.field=sField&stats.facet=fField1,fField2
and get the response like this:
<lst name="stats">
<lst name="stats_fields">
<lst name="sField">
<double name="min">1.0</double>
<double name="max">1.0</double>
<double name="sum">4.0</double>
<long name="count">4</long>
<long name="missing">0</long>
<double name="sumOfSquares">xxxxxxxx</double>
<double name="mean">xxxxxxxx</double>
<double name="stddev">xxxxxxxx</double>
<lst name="facets">
<lst name="fField1">
<lst name="fField1Value1">
<double name="min">1.0</double>
<double name="max">1.0</double>
<double name="sum">2.0</double>
<long name="count">2</long>
<long name="missing">0</long>
<double name="sumOfSquares">xxxxxxxx</double>
<double name="mean">xxxxxxxx</double>
<double name="stddev">xxxxxxxx</double>
<lst name="facets">
<lst name="fField2">
<lst name="fField2Value1">
<double name="min">1.0</double>
<double name="max">1.0</double>
<double name="sum">1.0</double>
<long name="count">1</long>
<long name="missing">0</long>
<double name="sumOfSquares">xxxxxxxx</double>
<double name="mean">xxxxxxxx</double>
<double name="stddev">xxxxxxxx</double>
</lst>
<lst name="fField2Value2">
<double name="min">1.0</double>
<double name="max">1.0</double>
<double name="sum">1.0</double>
<long name="count">1</long>
<long name="missing">0</long>
<double name="sumOfSquares">xxxxxxxx</double>
<double name="mean">xxxxxxxx</double>
<double name="stddev">xxxxxxxx</double>
</lst>
</lst>
</lst>
</lst>
<lst name="fField1Value2">
<double name="min">1.0</double>
<double name="max">1.0</double>
<double name="sum">2.0</double>
<long name="count">2</long>
<long name="missing">0</long>
<double name="sumOfSquares">xxxxxxxx</double>
<double name="mean">xxxxxxxx</double>
<double name="stddev">xxxxxxxx</double>
<lst name="facets">
<lst name="fField2">
<lst name="fField2Value1">
<double name="min">1.0</double>
<double name="max">1.0</double>
<double name="sum">1.0</double>
<long name="count">1</long>
<long name="missing">0</long>
<double name="sumOfSquares">xxxxxxxx</double>
<double name="mean">xxxxxxxx</double>
<double name="stddev">xxxxxxxx</double>
</lst>
<lst name="fField2Value2">
<double name="min">1.0</double>
<double name="max">1.0</double>
<double name="sum">1.0</double>
<long name="count">1</long>
<long name="missing">0</long>
<double name="sumOfSquares">xxxxxxxx</double>
<double name="mean">xxxxxxxx</double>
<double name="stddev">xxxxxxxx</double>
</lst>
</lst>
</lst>
</lst>
</lst>
</lst>
</lst>
</lst>
</lst>
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