Charles Draper created SOLR-8264:
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Summary: Date boosting losing to constant value in min function
when date value is null
Key: SOLR-8264
URL: https://issues.apache.org/jira/browse/SOLR-8264
Project: Solr
Issue Type: Bug
Affects Versions: 5.3
Reporter: Charles Draper
Priority: Minor
I am following https://wiki.apache.org/solr/FunctionQuery#Date_Boosting for
date boosting. This works great except when the date field is non-existent and
I attempt to set a maximum value. As I understand it, a non-existent date field
will default to the start of the epoch for functions. And so the following
boost works even though date_s doesn't exist for the particular record:
{code}
recip(ms(NOW/YEAR,date_s),3.16e-11,1,1)
0.021798734 =
1.0/(3.16E-11*float(ms(const(1420070400000),date(date_s)=null))+1.0)
{code}
However, when I try to apply a min function, the constant value is always
selected whether it is greater or less than the recip calculation:
{code}
min(1,recip(ms(NOW/YEAR,date_s),3.16e-11,1,1))
1.0 =
min(const(1),1.0/(3.16E-11*float(ms(const(1420070400000),date(date_s)=null))+1.0))
{code}
I am currently getting around the issue by supplying a default value for the
field in my schema.xml.
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