[jira] [Created] (SOLR-8273) deprecate implicitly uninverted fields, force people to either use docValues, or be explicit that they want query time uninversion

["Hoss Man (JIRA)" <ji...@apache.org>]

Hoss Man created SOLR-8273:
------------------------------

             Summary: deprecate implicitly uninverted fields, force people to either use docValues, or be explicit that they want query time uninversion
                 Key: SOLR-8273
                 URL: https://issues.apache.org/jira/browse/SOLR-8273
             Project: Solr
          Issue Type: Improvement
            Reporter: Hoss Man


once upon a time, there was nothing we could do to *stop* people from using the FieldCache - even if they didn't realize they were using it.

Then DocValues was added - and now people have a choice: they can set {{docValues=true}} on a field/fieldtype and know that when they do functions/sorting/faceting on that field, it won't require a big hunk of ram and a big stall everytime a reader was reopened.  But it's easy to overlook when clients might be doing something that required the FieldCache w/o realizing it -- and there is no way to stop them, because Solr automatically uses UninvertingReader under the covers and automatically allows every field to be uninverted in this way.

we should change that.

----

Straw man proposal...

* introduce a new boolean fieldType/field property {{uninvertable}}
* all existing FieldType classes should default to {{uninvertable==false}}
* a field or fieldType that contains {{indexed="false" uninvertable="true"}} should be an error.
* the Schema {{version}} value should be incremented, such that any Schema with an older version is treated as if every field with {{docValues==false}} has an implict {{uninvertable="true"}} on it.
* the Map passed to UninvertedReader should now only list items that have an effective value of {{uninvertable==true}}
* sample schemas should be updated to use docValues on any field where the examples using those schemas suggest using those fields in that way (ie: sorting, faceting, etc...)




--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org