Apache Solr Reference Guide Covering Apache Solr 6.0

Intervals must begin with either '(' or '[', be followed by the start value, then a comma (','), the end value, and
finally a closing ')' or ']’.
For example:
(1,10) -> will include values greater than 1 and lower than 10
[1,10) -> will include values greater or equal to 1 and lower than 10
[1,10] -> will include values greater or equal to 1 and lower or equal to 10
The initial and end values cannot be empty. If the interval needs to be unbounded, the special character '*'
can be used for both, start and end limit. When using '*', '(' and '[', and ')' and ']' will be treated equal. [*,*] will
include all documents with a value in the field. The interval limits may be strings but there is no need to add
quotes. All the text until the comma will be treated as the start limit, and the text after that will be the end limit.
For example: [Buenos Aires,New York]. Keep in mind that a string-like comparison will be done to match
documents in string intervals (case-sensitive). The comparator can't be changed.
Commas, brackets and square brackets can be escaped by using '\' in front of them. Whitespaces before and
after the values will be omitted. The start limit can't be grater than the end limit. Equal limits are allowed, this
allows you to indicate the specific values that you want to count, like [A,A], [B,B] and [C,Z].
Interval faceting supports output key replacement described below. Output keys can be replaced in both the f
acet.interval parameter and in the facet.interval.set parameter. For example:
&facet.interval={!key=popularity}some_field
&facet.interval.set={!key=bad}[0,5]
&facet.interval.set={!key=good}[5,*]
&facet=true
Local Parameters for Faceting
The LocalParams syntax allows overriding global settings. It can also provide a method of adding metadata to
other parameter values, much like XML attributes.
Tagging and Excluding Filters
You can tag specific filters and exclude those filters when faceting. This is useful when doing multi-select
faceting.
Consider the following example query with faceting:
q=mainquery&fq=status:public&fq=doctype:pdf&facet=true&facet.field=doctyp
e
Because everything is already constrained by the filter doctype:pdf, the facet.field=doctype facet
command is currently redundant and will return 0 counts for everything except doctype:pdf.
To implement a multi-select facet for doctype, a GUI may want to still display the other doctype values and
their associated counts, as if the doctype:pdf constraint had not yet been applied. For example:
=== Document Type ===
[ ] Word (42)
[x] PDF (96)
[ ] Excel(11)
[ ] HTML (63)
To return counts for doctype values that are currently not selected, tag filters that directly constrain doctype,
Apache Solr Reference Guide 6.0
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