Hoss Man created SOLR-11854:
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Summary: multiValued PrimitiveFieldType should implicitly sort on
min/max based on the asc/desc keyword
Key: SOLR-11854
URL: https://issues.apache.org/jira/browse/SOLR-11854
Project: Solr
Issue Type: Improvement
Security Level: Public (Default Security Level. Issues are Public)
Environment:
Back in SOLR-2522, I added new syntax for (numeric) fields such that the
{{field(someMultivaluedFieldName,min|max)}} syntax could be used to select
either the min or max value of a multivalued (docvalues) field for use in other
functions -- or for sorting.
A little while back, it occured to me that a good "default" behavior for all
primative multivalued fields would be:
* automatically use the "min" value when {{sort=someMultivaluedFieldName asc}}
is attempted
* automatically use the "max" value when {{sort=someMultivaluedFieldName desc}}
is attempted
These defaults seem like they would be a big improvement over the current
"throw an error" default behavior -- especially since it naturally reduces down
in the trivial case where all docs have at most 1 value anyway -- and would
align in practice with how most people I've talked to seem to think "sorting on
a multivalued field" should work in theory. If users don't like these
dafaults, they can always use the explicit {{field(foo,min|max)}} syntax
instead (ex: if users always want multivalued fields to sort on the 'min'
value, regardless of the asc|desc selector)
I've been experimenting with this off and on for a while, working up a POC
patch -- I think it's worth doing
(details to follow in comment)
Reporter: Hoss Man
Assignee: Hoss Man
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