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From "Noble Paul (JIRA)" <j...@apache.org>
Subject [jira] Commented: (SOLR-1131) Allow a single field type to index multiple fields
Date Tue, 15 Dec 2009 09:53:18 GMT

    [ https://issues.apache.org/jira/browse/SOLR-1131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12790635#action_12790635
] 

Noble Paul commented on SOLR-1131:
----------------------------------

in FieldType#createFields(SchemaField field, FieldType delegatedType, String storageVal, boost,
String ... externalVals)
{code:java}
String name = field.getName();
      Map<String, String> props = new HashMap<String, String>();
      //Just set these, delegate everything else to the field type
      props.put("indexed", "true");
      props.put("stored", "false");
      //props.put("omitNorms", "true");
      //props.put("tokenized", "false");
      if (field.indexed()) {

        for (int j = 0; j < externalVals.length; j++) {
          //SchemaField is final, as is name, so we need to recreate each time
          //put the counter before the separator, b/c dynamic fields can't be asterisks on
both the front and the end of the String
          SchemaField sf = SchemaField.create(name  + "_" + j + POLY_FIELD_SEPARATOR + delegatedType.typeName,
delegatedType, props);
          //QUESTION: should we allow for vectors, etc?  Not sure that it makes sense
          results[j] = delegatedType.createField(sf, externalVals[j], boost);
        }
      }
{code}

It is not clear as to why can't the 'sf' instance be cached and reused? 

Why do we have a map for flags why not use a bitset?

> Allow a single field type to index multiple fields
> --------------------------------------------------
>
>                 Key: SOLR-1131
>                 URL: https://issues.apache.org/jira/browse/SOLR-1131
>             Project: Solr
>          Issue Type: New Feature
>          Components: Schema and Analysis
>            Reporter: Ryan McKinley
>            Assignee: Grant Ingersoll
>             Fix For: 1.5
>
>         Attachments: SOLR-1131-IndexMultipleFields.patch, SOLR-1131.Mattmann.121009.patch.txt,
SOLR-1131.Mattmann.121109.patch.txt, SOLR-1131.patch, SOLR-1131.patch, SOLR-1131.patch, SOLR-1131.patch,
SOLR-1131.patch, SOLR-1131.patch, SOLR-1131.patch, SOLR-1131.patch, SOLR-1131.patch
>
>
> In a few special cases, it makes sense for a single "field" (the concept) to be indexed
as a set of Fields (lucene Field).  Consider SOLR-773.  The concept "point" may be best indexed
in a variety of ways:
>  * geohash (sincle lucene field)
>  * lat field, lon field (two double fields)
>  * cartesian tiers (a series of fields with tokens to say if it exists within that region)

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