jaisonbi edited a comment on pull request #2213:
URL: https://github.com/apache/lucene-solr/pull/2213#issuecomment-771296030
If I understood correctly, the route via PerFieldDocValuesFormat need to
change the usage of SortedSetDocValues.
The idea is adding another constructor for enabling terms dict compression,
as below:
```
public SortedSetDocValuesField(String name, BytesRef bytes, boolean
compression) {
super(name, compression ? COMPRESSION_TYPE: TYPE);
fieldsData = bytes;
}
```
And below is the definition of COMPRESSION_TYPE:
```
public static final FieldType COMPRESSION_TYPE = new FieldType();
static {
COMPRESSION_TYPE.setDocValuesType(DocValuesType.SORTED_SET);
// add one new attribute for telling PerFieldDocValuesFormat that terms
dict compression is enabled for this field
COMPRESSION_TYPE.putAttribute("docvalue.sortedset.compression", "true");
COMPRESSION_TYPE.freeze();
}
```
Not sure if I've got it right :)
@msokolov @bruno-roustant
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