rmuir commented on code in PR #14433:
URL: https://github.com/apache/lucene/pull/14433#discussion_r2034196400
##########
lucene/queries/src/java/org/apache/lucene/queries/function/IndexReaderFunctions.java:
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@@ -301,6 +304,17 @@ public static DoubleValuesSource docCount(String field) {
return new IndexReaderDoubleValuesSource(r -> r.getDocCount(field),
"docCount(" + field + ")");
}
+ /**
+ * Creates a value source that returns a field's length measured in number
of term positions. It
+ * comes from the "norm", and it's approximated, as determined by {@link
+ * Similarity#computeNorm(FieldInvertState)}.
+ *
+ * @see org.apache.lucene.index.LeafReader#getNormValues(String)
+ */
+ public static LongValuesSource fieldLength(String field) {
Review Comment:
please rename this as there is nothing that requires the norm to be this.
for example in some scoring methods it is the number of unique terms
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