Apache Solr Reference Guide Covering Apache Solr 6.0

it includes parentheses. For example:
_val_:myfield
_val_:"recip(rord(myfield),1,2,3)"
The Solr Query Parser offers nested query support for any type of query parser (via QParserPlugin).
Quotes are often necessary to encapsulate the nested query if it contains reserved characters. For
example:
_query_:"{!dismax qf=myfield}how now brown cow"
Although not technically a syntax difference, note that if you use the Solr TrieDateField type, any queries on
those fields (typically range queries) should use either the Complete ISO 8601 Date syntax that field supports, or
the DateMath Syntax to get relative dates. For example:
timestamp:[* TO NOW]
createdate:[1976-03-06T23:59:59.999Z TO *]
createdate:[1995-12-31T23:59:59.999Z TO 2007-03-06T00:00:00Z]
pubdate:[NOW-1YEAR/DAY TO NOW/DAY+1DAY]
createdate:[1976-03-06T23:59:59.999Z TO 1976-03-06T23:59:59.999Z+1YEAR]
createdate:[1976-03-06T23:59:59.999Z/YEAR TO 1976-03-06T23:59:59.999Z]
TO must be uppercase, or Solr will report a 'Range Group' error.
Function Queries
Function queries enable you to generate a relevancy score using the actual value of one or more numeric fields.
Function queries are supported by the DisMax, Extended DisMax, and standard query parsers.
Function queries use functions. The functions can be a constant (numeric or string literal), a field, another
function or a parameter substitution argument. You can use these functions to modify the ranking of results for
users. These could be used to change the ranking of results based on a user's location, or some other
calculation.
Function query topics covered in this section:
Using Function Query
Available Functions
Example Function Queries
Sort By Function
Related Topics
Using Function Query
Functions must be expressed as function calls (for example, sum(a,b) instead of simply a+b).
There are several ways of using function queries in a Solr query:
Via an explicit QParser that expects function arguments, such func or frange . For example:
q={!func}div(popularity,price)&fq={!frange l=1000}customer_ratings
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