[ https://issues.apache.org/jira/browse/SOLR-8220?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ishan Chattopadhyaya updated SOLR-8220: --------------------------------------- Attachment: SOLR-8220.patch Updated the patch to have the useDocValuesAsStored attribute on a per field basis (instead of being at schema's top level). > Read field from docValues for non stored fields > ----------------------------------------------- > > Key: SOLR-8220 > URL: https://issues.apache.org/jira/browse/SOLR-8220 > Project: Solr > Issue Type: Improvement > Reporter: Keith Laban > Attachments: SOLR-8220-5x.patch, SOLR-8220-ishan.patch, > SOLR-8220-ishan.patch, SOLR-8220-ishan.patch, SOLR-8220-ishan.patch, > SOLR-8220.patch, SOLR-8220.patch, SOLR-8220.patch, SOLR-8220.patch, > SOLR-8220.patch, SOLR-8220.patch, SOLR-8220.patch, SOLR-8220.patch, > SOLR-8220.patch, SOLR-8220.patch, SOLR-8220.patch, SOLR-8220.patch, > SOLR-8220.patch, SOLR-8220.patch, SOLR-8220.patch, SOLR-8220.patch, > SOLR-8220.patch > > > Many times a value will be both stored="true" and docValues="true" which > requires redundant data to be stored on disk. Since reading from docValues is > both efficient and a common practice (facets, analytics, streaming, etc), > reading values from docValues when a stored version of the field does not > exist would be a valuable disk usage optimization. > The only caveat with this that I can see would be for multiValued fields as > they would always be returned sorted in the docValues approach. I believe > this is a fair compromise. > I've done a rough implementation for this as a field transform, but I think > it should live closer to where stored fields are loaded in the > SolrIndexSearcher. > Two open questions/observations: > 1) There doesn't seem to be a standard way to read values for docValues, > facets, analytics, streaming, etc, all seem to be doing their own ways, > perhaps some of this logic should be centralized. > 2) What will the API behavior be? (Below is my proposed implementation) > Parameters for fl: > - fl="docValueField" > -- return field from docValue if the field is not stored and in docValues, > if the field is stored return it from stored fields > - fl="*" > -- return only stored fields > - fl="+" > -- return stored fields and docValue fields > 2a - would be easiest implementation and might be sufficient for a first > pass. 2b - is current behavior -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org