I have a simple set of docs containing two fields, an id and a price.
When I run a constant score query, such as *:*, I, of course, get a
score back of 1 for all the docs.
If I add a simple Field Value function query to the constant score
query, as in: *:* _val_:price_f, the query norm comes into play and I
don't get back what I thought I would, which is the score would be the
value of the field:
<lst name="debug">
<str name="rawquerystring">*:* _val_:price_f</str>
<str name="querystring">*:* _val_:price_f</str>
<str name="parsedquery">+MatchAllDocsQuery(*:*) +FunctionQuery(float
(price_f))</str>
<str name="parsedquery_toString">+*:* +float(price_f)</str>
<lst name="explain">
<str name="7">
70712.48 = (MATCH) sum of:
0.70710677 = (MATCH) MatchAllDocsQuery, product of:
0.70710677 = queryNorm
70711.766 = (MATCH) FunctionQuery(float(price_f)), product of:
100001.54 = float(price_f)=100001.54
1.0 = boost
0.70710677 = queryNorm
</str>
As a workaround, I can do: *:*^0 _val_:price_f, which gets rid of the
query norm factor.
I realize I could override the similarity or use the workaround, but I
was just curious about what other people think of this.
Thanks,
Grant
